{
  "schemaVersion": 3,
  "reportDate": "2026-10-18",
  "generatedAt": "2026-10-18T17:01:38+00:00",
  "currentSnapshotAt": "2026-10-18T16:31:00+00:00",
  "previousSnapshotAt": "2026-10-17T16:31:00+00:00",
  "sourceSnapshots": {
    "current": {
      "id": 698301,
      "timestamp": "2026-10-18T16:31:00+00:00"
    },
    "previous": {
      "id": 688233,
      "timestamp": "2026-10-17T16:31:00+00:00"
    }
  },
  "windowHours": 24.0,
  "currency": "BTC",
  "methodology": {
    "source": "Derivasys proprietary historical SVI surface and canonical BTC index databases",
    "comparison": "Nearest successful surface snapshots approximately 24 hours apart",
    "rrConvention": "25-delta call IV minus 25-delta put IV",
    "bfConvention": "Average 25-delta wing IV minus ATM forward IV",
    "greeks": "Black forward Greeks for a normalized one-BTC ATM-forward call, zero rate, fitted SVI IV",
    "commentary": "Metrics and takeaways are deterministic. Daily headlines and introductions may be model-assisted, constrained to the same stored facts; weekly prose is deterministic.",
    "fixedTenors": "Fixed-tenor measures are published only when listed expiries bracket the target at both comparison snapshots. Targets outside either observable range are suppressed, not extrapolated; headline rankings use only supported tenors.",
    "smileReconstruction": "Listed-expiry smiles are reconstructed from stored SVI total-variance parameters on a fixed log-moneyness grid.",
    "ultraShortExpiry": "Expiries with fewer than 2 full days remaining stay in detailed tables but are excluded from headline rankings. Settlement proximity, time decay, changing liquidity and fewer quotes can exaggerate their changes.",
    "causalClaims": "The report describes observed surface and realised-volatility changes only and does not infer unsupported market drivers, flows or forecasts.",
    "realisedVolatility": "Annualised root-mean-square of one-minute canonical BTC-USD index log returns using a 365-day basis; all windows end at the current snapshot."
  },
  "realisedVolatility": {
    "source": "canonical/BTC-USD-INDEX (DERIBIT and OKX indexes)",
    "fallbackObservations": 60,
    "fallbackPolicy": "Missing canonical minutes use the stored Deribit index first, then the stored OKX index; canonical bars always take precedence.",
    "samplingInterval": "1 minute",
    "annualizationBasis": "365 days",
    "windowEnd": "2026-10-18T16:31:00+00:00",
    "spotWindowStart": "2026-10-17T16:31:00+00:00",
    "spotMetric": "spot-index return",
    "spotUnit": "percent",
    "spotMove24hPercent": -0.15,
    "rv24hPercent": 23.59,
    "rv7dPercent": 34.83,
    "rv30dPercent": 33.13,
    "observations": {
      "24h": 1440,
      "7d": 10080,
      "30d": 43200
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    "coverage": {
      "24h": {
        "status": "complete",
        "observedReturns": 1440,
        "expectedReturns": 1440,
        "coveragePercent": 100.0,
        "missingPriceMinutes": 0,
        "missingIntervals": 0,
        "largestMissingRunMinutes": 0,
        "unavailableReason": null
      },
      "7d": {
        "status": "complete",
        "observedReturns": 10080,
        "expectedReturns": 10080,
        "coveragePercent": 100.0,
        "missingPriceMinutes": 0,
        "missingIntervals": 0,
        "largestMissingRunMinutes": 0,
        "unavailableReason": null
      },
      "30d": {
        "status": "complete",
        "observedReturns": 43200,
        "expectedReturns": 43200,
        "coveragePercent": 100.0,
        "missingPriceMinutes": 0,
        "missingIntervals": 0,
        "largestMissingRunMinutes": 0,
        "unavailableReason": null
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    "coveragePolicy": {
      "version": "observed-minute-returns-v1",
      "minimumCoveragePercent": null,
      "minimumCoveragePercentByWindow": {
        "24h": 98.0,
        "7d": 97.0,
        "30d": 99.5
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      "maximumMissingRunMinutes": 60,
      "methodology": "Each RV window qualifies independently. RV annualises the mean squared observed one-minute log return; returns spanning gaps are excluded, not interpolated or zero-filled. Partial estimates assume observed minutes are representative and may miss volatility during gaps."
    },
    "spotUnavailableReason": null,
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    "source": "codex",
    "model": "gpt-6.1-sol",
    "headline": "Bitcoin options: 1w ATM implied volatility rises 3.17 points",
    "executiveSummary": "Bitcoin's 1W ATM implied volatility was 0.30 volatility points below seven-day realised volatility of 34.83%, measured using one-minute returns through the surface cutoff. That comparison does not establish whether options are cheap or expensive. Bitcoin's spot index returned -0.15% over 24 hours, a separate observation that does not explain the volatility increase.",
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    "newsSummary": "In underlying-market news, [Decrypt reported](https://decrypt.co/381246/bitcoin-etfs-shed-nearly-1-billion-two-weeks-uptober-red) Bitcoin ETF net outflows of $228.6 million for the week, following $681.1 million in the preceding week. The provisional, single-source report describes successive weekly flows, rather than flows over the daily options window. It provides context without establishing a causal link to the 1W implied-volatility move.",
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        "label": "Implied versus realised",
        "text": "At the 16:31 UTC cutoff, 1W ATM IV was 34.53%, broadly in line with seven-day realised volatility of 34.83%; 24-hour realised volatility was 23.59% and 30-day realised volatility was 33.13%."
      },
      {
        "id": "front-atm",
        "label": "Front end",
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      },
      {
        "id": "back-atm",
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      },
      {
        "id": "rr25",
        "label": "Skew",
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      },
      {
        "id": "bf25",
        "label": "Convexity",
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        "label": "Largest standard-tenor move",
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        "value": 3.17
      },
      {
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        "label": "24h spot-index return",
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        "source": "realisedVolatility.spotReturns.windows.24h"
      },
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validated dispersion lower tail <= 10 uses scale 1\",\"historicalBonus\":0.0,\"historicalMagnitudeScale\":0.075,\"magnitudeScale\":2.0,\"magnitudeScore\":0.15,\"normalizedMagnitude\":0.075,\"rarity\":{\"magnitudeIndependent\":false,\"percentile\":8.5,\"policyVersion\":1,\"tail\":\"none\",\"tailDistance\":0.0},\"selectionAdjustment\":0.0,\"selectionScore\":0.15,\"totalScore\":0.15,\"unit\":\"percent\",\"version\":3},\"selectionReason\":\"Deterministic metric-scaled magnitude, matching historical rarity, evidence availability and validated coordination/crossings; ties ordered by candidate ID\",\"selectionScore\":0.15,\"source\":\"realisedVolatility.spotMove24hPercent\",\"spotReturnEvidence\":{\"endAt\":\"2026-10-18T16:31:00+00:00\",\"endEndpoint\":{\"fallback\":false,\"instrument\":\"BTC-USD-INDEX\",\"price\":81037.4,\"sourceInstrument\":\"btc_usd\",\"sourceVenue\":\"deribit\",\"timestamp\":\"2026-10-18T16:31:00+00:00\",\"unavailableReason\":null,\"venue\":\"canonical\"},\"sourceSha256\":\"faeac3ac8a760a62ca6b5536bad7e51d48318b043b64fba44602706e21231e1f\",\"startAt\":\"2026-10-17T16:31:00+00:00\",\"startEndpoint\":{\"fallback\":false,\"instrument\":\"BTC-USD-INDEX\",\"price\":81158.64,\"sourceInstrument\":\"btc_usd\",\"sourceVenue\":\"deribit\",\"timestamp\":\"2026-10-17T16:31:00+00:00\",\"unavailableReason\":null,\"venue\":\"canonical\"},\"status\":\"available\",\"unavailableReason\":null,\"valuePercent\":-0.15},\"story\":\"BTC spot-index return was -0.15% over 24 hours\",\"tenor\":null},{\"asset\":\"BTC\",\"change\":null,\"current\":-0.3,\"expiry\":null,\"headlinePolicyVersion\":2,\"historicalContext\":{\"basis\":\"matching stored history unavailable\",\"minimumObservations\":20,\"observationKind\":\"level\",\"observations\":null,\"percentile\":null,\"sourceRefs\":[\"realisedVolatility.oneWeekIvMinus7dRvPoints\"],\"status\":\"unavailable\",\"unavailableReason\":\"history-status-unavailable-or-invalid\",\"window\":{\"end\":null,\"start\":null}},\"historicalLevelPercentile\":null,\"historicalPercentile\":null,\"historicalZScore\":null,\"id\":\"btc-implied-realised-7d\",\"laggard\":null,\"leader\":null,\"metric\":\"impliedRealised\",\"metricLabel\":\"implied-versus-realised spread\",\"observationKind\":\"level\",\"previous\":null,\"relativeChangePercent\":null,\"scope\":\"single-asset\",\"score\":0.06,\"scoreComponents\":{\"evidenceQuality\":1.0,\"formula\":\"(2 * min(abs(observation) / metric scale, 20) + rarity * historical magnitude scale) * evidence quality; validated dispersion lower tail <= 10 uses scale 1\",\"historicalBonus\":0.0,\"historicalMagnitudeScale\":0.03,\"magnitudeScale\":10.0,\"magnitudeScore\":0.06,\"normalizedMagnitude\":0.03,\"rarity\":{\"magnitudeIndependent\":false,\"percentile\":null,\"policyVersion\":1,\"tail\":\"none\",\"tailDistance\":0.0},\"selectionAdjustment\":0.0,\"selectionScore\":0.06,\"totalScore\":0.06,\"unit\":\"volatility points\",\"version\":3},\"selectionReason\":\"Deterministic metric-scaled magnitude, matching historical rarity, evidence availability and validated coordination/crossings; ties ordered by candidate ID\",\"selectionScore\":0.06,\"source\":\"realisedVolatility.oneWeekIvMinus7dRvPoints\",\"story\":\"BTC 1W implied-versus-realised spread stood at -0.30\",\"tenor\":\"1W\"},{\"asset\":\"BTC\",\"change\":-9.469,\"current\":null,\"expiry\":\"21OCT26\",\"headlineEligibility\":{\"basis\":\"Native rotation classification and expiry-distance eligibility alone do not qualify a headline\",\"sourceRefs\":[\"surfaceEvents[rotation]\",\"listedExpiries[].rankingEligible\",\"fitQuality\"],\"status\":\"unavailable\",\"unavailableReason\":\"expiry-specific-fit-quality-and-matching-rotation-history-unavailable\",\"version\":1},\"headlineEligible\":false,\"headlinePolicyVersion\":2,\"historicalContext\":{\"basis\":\"matching stored history unavailable\",\"minimumObservations\":20,\"observationKind\":\"change\",\"observations\":null,\"percentile\":null,\"sourceRefs\":[\"surfaceEvents[rotation]\"],\"status\":\"unavailable\",\"unavailableReason\":\"history-status-unavailable-or-invalid\",\"window\":{\"end\":null,\"start\":null}},\"historicalLevelPercentile\":null,\"historicalPercentile\":null,\"historicalZScore\":null,\"id\":\"btc-smile-rotation\",\"laggard\":null,\"leader\":null,\"metric\":\"smileRotation\",\"metricLabel\":\"smile rotation\",\"observationKind\":\"change\",\"previous\":null,\"relativeChangePercent\":null,\"scope\":\"single-asset\",\"score\":18.938,\"scoreComponents\":{\"evidenceQuality\":1.0,\"formula\":\"(2 * min(abs(observation) / metric scale, 20) + rarity * historical magnitude scale) * evidence quality; validated dispersion lower tail <= 10 uses scale 1\",\"historicalBonus\":0.0,\"historicalMagnitudeScale\":1.0,\"magnitudeScale\":1.0,\"magnitudeScore\":18.938,\"normalizedMagnitude\":9.469,\"rarity\":{\"magnitudeIndependent\":false,\"percentile\":null,\"policyVersion\":1,\"tail\":\"none\",\"tailDistance\":0.0},\"selectionAdjustment\":-19.938,\"selectionScore\":-1.0,\"totalScore\":18.938,\"unit\":\"volatility points\",\"version\":3},\"selectionReason\":\"expiry-specific-fit-quality-and-matching-rotation-history-unavailable\",\"selectionScore\":-1.0,\"source\":\"surfaceEvents[rotation]\",\"story\":\"BTC 21OCT26 smile rotation moved lower by 9.47\",\"tenor\":null}],\"chosenStoryId\":\"btc-largestAtmMove\",\"nativeFacts\":{\"asset\":\"BTC\",\"cadence\":\"daily\",\"comparison_status\":null,\"current_snapshot_at\":\"2026-10-18T16:31:00+00:00\",\"previous_snapshot_at\":\"2026-10-17T16:31:00+00:00\",\"report_date\":\"2026-10-18\",\"source_snapshots\":{\"current\":{\"id\":698301,\"timestamp\":\"2026-10-18T16:31:00+00:00\"},\"previous\":{\"id\":688233,\"timestamp\":\"2026-10-17T16:31:00+00:00\"}},\"tenors\":[{\"atmIv\":{\"change\":3.17,\"current\":34.53,\"percentChange\":10.11,\"previous\":31.36},\"availability\":\"available\",\"bf25\":{\"change\":0.13,\"current\":2.13,\"percentChange\":6.5,\"previous\":2.0},\"rr25\":{\"change\":0.35,\"current\":-4.11,\"percentChange\":7.85,\"previous\":-4.46},\"tenor\":\"1W\",\"unavailableReason\":null},{\"atmIv\":{\"change\":2.3,\"current\":35.79,\"percentChange\":6.87,\"previous\":33.49},\"availability\":\"available\",\"bf25\":{\"change\":-0.03,\"current\":2.01,\"percentChange\":-1.47,\"previous\":2.04},\"rr25\":{\"change\":0.45,\"current\":-3.75,\"percentChange\":10.71,\"previous\":-4.2},\"tenor\":\"2W\",\"unavailableReason\":null},{\"atmIv\":{\"change\":1.01,\"current\":36.77,\"percentChange\":2.82,\"previous\":35.76},\"availability\":\"available\",\"bf25\":{\"change\":-0.08,\"current\":2.06,\"percentChange\":-3.74,\"previous\":2.14},\"rr25\":{\"change\":-0.2,\"current\":-3.32,\"percentChange\":-6.41,\"previous\":-3.12},\"tenor\":\"1M\",\"unavailableReason\":null},{\"atmIv\":{\"change\":0.28,\"current\":36.95,\"percentChange\":0.76,\"previous\":36.67},\"availability\":\"available\",\"bf25\":{\"change\":-0.05,\"current\":2.17,\"percentChange\":-2.25,\"previous\":2.22},\"rr25\":{\"change\":-0.27,\"current\":-2.55,\"percentChange\":-11.84,\"previous\":-2.28},\"tenor\":\"3M\",\"unavailableReason\":null},{\"atmIv\":{\"change\":0.05,\"current\":37.74,\"percentChange\":0.13,\"previous\":37.69},\"availability\":\"available\",\"bf25\":{\"change\":-0.16,\"current\":2.06,\"percentChange\":-7.21,\"previous\":2.22},\"rr25\":{\"change\":-0.16,\"current\":-1.78,\"percentChange\":-9.88,\"previous\":-1.62},\"tenor\":\"6M\",\"unavailableReason\":null},{\"atmIv\":{\"change\":0.01,\"current\":38.23,\"percentChange\":0.03,\"previous\":38.22},\"availability\":\"available\",\"bf25\":{\"change\":-0.14,\"current\":2.11,\"percentChange\":-6.22,\"previous\":2.25},\"rr25\":{\"change\":-0.16,\"current\":-1.57,\"percentChange\":-11.35,\"previous\":-1.41},\"tenor\":\"9M\",\"unavailableReason\":null},{\"atmIv\":{\"change\":null,\"current\":null,\"percentChange\":null,\"previous\":null},\"availability\":\"unavailable\",\"bf25\":{\"change\":null,\"current\":null,\"percentChange\":null,\"previous\":null},\"rr25\":{\"change\":null,\"current\":null,\"percentChange\":null,\"previous\":null},\"tenor\":\"1Y\",\"unavailableReason\":\"The target tenor falls outside the listed-expiry range at one or both snapshots; extrapolated values are suppressed.\"}],\"window_hours\":24.0}}"
    },
    "events": [
      {
        "event_cluster_id": "market-event-13107e951d78",
        "status": "selected",
        "eventCategory": "unknown",
        "relevance": "broader crypto",
        "relationship": "neutral",
        "causal_confidence": "low",
        "matched_signals": [
          "Forward 21OCT26: -173.23 USD (-0.21%) to 81101.80 USD"
        ],
        "selection_reason": "Retained as contemporaneous price context alongside Forward 21OCT26: -173.23 USD (-0.21%) to 81101.80 USD; the surface data does not establish a causal relationship.",
        "primary_article": {
          "id": "16be05e3-4bd2-4fc2-af36-e46dc75bfc9a",
          "sourceId": "decrypt",
          "publisher": "Decrypt",
          "title": "Bitcoin ETFs Shed Nearly $1 Billion in Two Weeks as Uptober Stays Red",
          "url": "https://decrypt.co/381246/bitcoin-etfs-shed-nearly-1-billion-two-weeks-uptober-red",
          "publishedAt": "2026-10-18T15:01:04+00:00",
          "summary": "Bitcoin ETFs lost a net $228.6 million this week, following a $681.1 million drain the week before and pushing October deep into the red.",
          "matchedTerms": [
            "BTC",
            "Bitcoin",
            "Bitcoin ETFs Shed Nearly",
            "Two Weeks",
            "Uptober Stays Red Bitcoin"
          ],
          "topics": [
            "institutional",
            "etf_flow"
          ],
          "sourceKind": "media",
          "rightsStatus": "link-and-summary",
          "selectionScore": 35,
          "quality": {
            "eligible": true,
            "score": 34.6,
            "checks": {
              "verifiedSourceMetadata": true,
              "contentKind": true,
              "status": true
            },
            "sourceCount": 1,
            "sourceQuality": 0.6025,
            "signals": {
              "confidence": 0.53,
              "importance": 0.39,
              "novelty": 1.0,
              "corroboration": 0.0,
              "sourceQuality": 0.6025,
              "effectiveSourceQuality": 0.6025,
              "catalystScore": 0.0747,
              "effectiveCatalystScore": 0.0747,
              "contentKind": "reporting",
              "status": "developing"
            },
            "thresholds": {
              "minimumConfidence": null,
              "minimumImportance": null,
              "minimumSourceQuality": 0.58,
              "minimumCatalystScore": null,
              "minimumMediaReliability": 0.6
            },
            "policy": "source-backed-context-v1",
            "role": "context",
            "attributionRequired": true
          },
          "relevanceReasons": [
            "Retained as contemporaneous price context alongside Forward 21OCT26: -173.23 USD (-0.21%) to 81101.80 USD; the surface data does not establish a causal relationship."
          ],
          "selectionReason": "Retained as contemporaneous price context alongside Forward 21OCT26: -173.23 USD (-0.21%) to 81101.80 USD; the surface data does not establish a causal relationship.",
          "canonicalEventId": "16be05e3-4bd2-4fc2-af36-e46dc75bfc9a",
          "status": "selected",
          "eventCategory": "unknown",
          "relevance": "broader crypto",
          "relationship": "neutral",
          "causal_confidence": "low",
          "matched_signals": [
            "Forward 21OCT26: -173.23 USD (-0.21%) to 81101.80 USD"
          ],
          "selection_reason": "Retained as contemporaneous price context alongside Forward 21OCT26: -173.23 USD (-0.21%) to 81101.80 USD; the surface data does not establish a causal relationship.",
          "event_cluster_id": "market-event-13107e951d78"
        },
        "additional_coverage": []
      }
    ]
  },
  "newsContext": {
    "outcome": "Relevant context found; no confirmed catalyst",
    "highest_causal_confidence": "low",
    "section_heading": "Relevant market event",
    "events": [
      {
        "event_cluster_id": "market-event-13107e951d78",
        "status": "selected",
        "eventCategory": "unknown",
        "relevance": "broader crypto",
        "relationship": "neutral",
        "causal_confidence": "low",
        "matched_signals": [
          "Forward 21OCT26: -173.23 USD (-0.21%) to 81101.80 USD"
        ],
        "selection_reason": "Retained as contemporaneous price context alongside Forward 21OCT26: -173.23 USD (-0.21%) to 81101.80 USD; the surface data does not establish a causal relationship.",
        "primary_article": {
          "id": "16be05e3-4bd2-4fc2-af36-e46dc75bfc9a",
          "sourceId": "decrypt",
          "publisher": "Decrypt",
          "title": "Bitcoin ETFs Shed Nearly $1 Billion in Two Weeks as Uptober Stays Red",
          "url": "https://decrypt.co/381246/bitcoin-etfs-shed-nearly-1-billion-two-weeks-uptober-red",
          "publishedAt": "2026-10-18T15:01:04+00:00",
          "summary": "Bitcoin ETFs lost a net $228.6 million this week, following a $681.1 million drain the week before and pushing October deep into the red.",
          "matchedTerms": [
            "BTC",
            "Bitcoin",
            "Bitcoin ETFs Shed Nearly",
            "Two Weeks",
            "Uptober Stays Red Bitcoin"
          ],
          "topics": [
            "institutional",
            "etf_flow"
          ],
          "sourceKind": "media",
          "rightsStatus": "link-and-summary",
          "selectionScore": 35,
          "quality": {
            "eligible": true,
            "score": 34.6,
            "checks": {
              "verifiedSourceMetadata": true,
              "contentKind": true,
              "status": true
            },
            "sourceCount": 1,
            "sourceQuality": 0.6025,
            "signals": {
              "confidence": 0.53,
              "importance": 0.39,
              "novelty": 1.0,
              "corroboration": 0.0,
              "sourceQuality": 0.6025,
              "effectiveSourceQuality": 0.6025,
              "catalystScore": 0.0747,
              "effectiveCatalystScore": 0.0747,
              "contentKind": "reporting",
              "status": "developing"
            },
            "thresholds": {
              "minimumConfidence": null,
              "minimumImportance": null,
              "minimumSourceQuality": 0.58,
              "minimumCatalystScore": null,
              "minimumMediaReliability": 0.6
            },
            "policy": "source-backed-context-v1",
            "role": "context",
            "attributionRequired": true
          },
          "relevanceReasons": [
            "Retained as contemporaneous price context alongside Forward 21OCT26: -173.23 USD (-0.21%) to 81101.80 USD; the surface data does not establish a causal relationship."
          ],
          "selectionReason": "Retained as contemporaneous price context alongside Forward 21OCT26: -173.23 USD (-0.21%) to 81101.80 USD; the surface data does not establish a causal relationship.",
          "canonicalEventId": "16be05e3-4bd2-4fc2-af36-e46dc75bfc9a",
          "status": "selected",
          "eventCategory": "unknown",
          "relevance": "broader crypto",
          "relationship": "neutral",
          "causal_confidence": "low",
          "matched_signals": [
            "Forward 21OCT26: -173.23 USD (-0.21%) to 81101.80 USD"
          ],
          "selection_reason": "Retained as contemporaneous price context alongside Forward 21OCT26: -173.23 USD (-0.21%) to 81101.80 USD; the surface data does not establish a causal relationship.",
          "event_cluster_id": "market-event-13107e951d78"
        },
        "additional_coverage": []
      }
    ],
    "coverage_status": "healthy",
    "coverage_basis": "monitored-source-search"
  },
  "marketRead": {
    "text": "1W ATM IV rose 3.17 volatility points to 34.53%, a notable move at the 87th percentile among 23 comparable historical observations. At the cutoff, realised volatility measured 23.59% over 24 hours, 34.83% over seven days and 33.13% over 30 days. Front-end ATM IV averaged 35.70%, +2.16 points from the prior snapshot, while the long end averaged 37.74%, +0.05 points. 2W RR25 moved 0.45 volatility points toward calls to -3.75%, leaving puts richer than calls. 6M BF25 fell 0.16 volatility points to 2.06%. 24-hour spot-index: -0.15%; nearest eligible forward 21OCT26: -0.21% to $81,101.80. Relevant context found; no confirmed catalyst; the strongest assessed relationship has low causal confidence.",
    "wordCount": 106,
    "source": "deterministic structured report facts",
    "evidenceFields": [
      "summaryMetrics.largestAtmMove",
      "realisedVolatility.spotMove24hPercent",
      "realisedVolatility.rv24hPercent",
      "realisedVolatility.rv7dPercent",
      "realisedVolatility.rv30dPercent",
      "summaryMetrics.frontEndAverageAtm",
      "summaryMetrics.longEndAverageAtm",
      "summaryMetrics.largestRr25Move",
      "summaryMetrics.largestBf25Move",
      "summaryMetrics.nearestEligibleForwardMove",
      "newsContext.outcome",
      "newsContext.highest_causal_confidence"
    ]
  },
  "facts": [
    {
      "id": "realised-vol",
      "label": "Implied versus realised",
      "text": "At the 16:31 UTC cutoff, 1W ATM IV was 34.53%, broadly in line with seven-day realised volatility of 34.83%; 24-hour realised volatility was 23.59% and 30-day realised volatility was 33.13%."
    },
    {
      "id": "front-atm",
      "label": "Front end",
      "text": "Front-end ATM IV increased, averaging +2.16 volatility points to 35.70% across 1W, 2W and 1M."
    },
    {
      "id": "back-atm",
      "label": "Long end",
      "text": "Long-dated ATM IV was broadly unchanged, averaging +0.05 volatility points to 37.74% across 6M and 1Y."
    },
    {
      "id": "rr25",
      "label": "Skew",
      "text": "RR25 was broadly unchanged, averaging +0.03 volatility points to -3.10% across the six headline tenors."
    },
    {
      "id": "bf25",
      "label": "Convexity",
      "text": "BF25 was broadly unchanged, averaging -0.04 volatility points to 2.09% across the six headline tenors."
    },
    {
      "id": "largest-standard-tenor",
      "label": "Largest standard-tenor move",
      "text": "The largest standard-tenor ATM IV move was +3.17 volatility points at 1W, to 34.53%.",
      "tenor": "1W",
      "value": 3.17
    },
    {
      "id": "spot-index-24h",
      "label": "24h spot-index return",
      "text": "BTC spot-index return was -0.15% over 24 hours.",
      "source": "realisedVolatility.spotReturns.windows.24h"
    },
    {
      "id": "spot-index-7d",
      "label": "7d spot-index return",
      "text": "BTC spot-index return was -3.27% over seven days.",
      "source": "realisedVolatility.spotReturns.windows.7d"
    }
  ],
  "summaryMetrics": {
    "basis": "Fixed-tenor endpoint comparison",
    "unit": "volatility points",
    "atmIvChange": 1.36,
    "rr25Change": 0.03,
    "bf25Change": -0.04,
    "largestAtmMove": {
      "tenor": "1W",
      "current": 34.53,
      "previous": 31.36,
      "change": 3.17,
      "historicalSignificance": {
        "absoluteMove": 3.17,
        "currentLevel": 34.53,
        "movePercentile30d": 87.0,
        "movePercentileFullHistory": 78.6,
        "currentLevelPercentileFullHistory": 69.6,
        "classificationPercentile": 87.0,
        "label": "notable",
        "observations30d": 23,
        "observationsFullHistory": 42,
        "levelObservationsFullHistory": 46,
        "provenance": {
          "schemaVersion": 2,
          "reportDate": "2026-10-18",
          "currentSnapshotAt": "2026-10-18T16:31:00+00:00",
          "previousSnapshotAt": "2026-10-17T16:31:00+00:00",
          "eligibilityPolicy": "known native timestamps; end <= current start; matching UTC endpoint clocks and supported horizon",
          "sourceEndpoints": [
            {
              "date": "2026-08-29",
              "snapshotAt": "2026-08-29T16:31:00+00:00",
              "fitRunId": 205442,
              "value": 32.74,
              "observationDigest": "sha256:2593ecf8c0ce7a70fec5dd5ee2452fb65464b2676c9e667abbf7533ea30b65aa"
            },
            {
              "date": "2026-08-30",
              "snapshotAt": "2026-08-30T16:31:00+00:00",
              "fitRunId": 215528,
              "value": 33.47,
              "observationDigest": "sha256:8461ecfb7b4a25d123a93264d822ffd6829c6daed45a6647baa7af8c3a4d1ee3"
            },
            {
              "date": "2026-08-31",
              "snapshotAt": "2026-08-31T16:31:00+00:00",
              "fitRunId": 225570,
              "value": 33.84,
              "observationDigest": "sha256:4bb99cf6674d62c5dcc01fd1e0be3caea47497f8a22c85589c6fb5d99ea45386"
            },
            {
              "date": "2026-09-01",
              "snapshotAt": "2026-09-01T16:31:00+00:00",
              "fitRunId": 235598,
              "value": 33.32,
              "observationDigest": "sha256:8432ddb6c638ade24719f4c987109c268ce224796b5526153ef2cfd61a8642e9"
            },
            {
              "date": "2026-09-02",
              "snapshotAt": "2026-09-02T16:31:00+00:00",
              "fitRunId": 245673,
              "value": 31.18,
              "observationDigest": "sha256:16bb2fe8cb59c89ea9d2a19eae4df1ebac1350797747c4c8df8fbea97b50d271"
            },
            {
              "date": "2026-09-03",
              "snapshotAt": "2026-09-03T16:31:00+00:00",
              "fitRunId": 255688,
              "value": 37.25,
              "observationDigest": "sha256:20e0b1d9a11cedbc9c1dfed9285854ca537f27a965db161f42f89d58023b3702"
            },
            {
              "date": "2026-09-04",
              "snapshotAt": "2026-09-04T16:31:00+00:00",
              "fitRunId": 265757,
              "value": 31.84,
              "observationDigest": "sha256:33a5decd967231164b274ba33cacf2cfc4050e3a9a04fa4210983fef10282db5"
            },
            {
              "date": "2026-09-05",
              "snapshotAt": "2026-09-05T16:31:00+00:00",
              "fitRunId": 275834,
              "value": 33.66,
              "observationDigest": "sha256:0be0cc61d21182b9ae82f89e538e54d91dd3fa4786b95d09660332d9e5744c91"
            },
            {
              "date": "2026-09-06",
              "snapshotAt": "2026-09-06T16:31:00+00:00",
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        "window": {
          "startAt": "2026-08-29T16:31:00+00:00",
          "endAt": "2026-10-17T16:31:00+00:00"
        },
        "sourceProjection": "immutable consumed identity, timestamp, tenor availability and ATM endpoint fields; no marginal percentile inputs"
      },
      "policy": {
        "version": 2,
        "slopeDefinition": "1M ATM IV minus 1W ATM IV",
        "dailyWindowHours": {
          "minimum": 23,
          "maximum": 25
        },
        "samplingClockToleranceSeconds": 0,
        "minimumHistoryObservations": 20,
        "crossingDefinition": "strictly negative to strictly positive, or strictly positive to strictly negative",
        "zeroHandling": "an exactly zero endpoint is a zero touch, not a genuine sign crossing",
        "rarityBasis": "absolute slope changes in compatible prior daily observations of this asset and these tenors",
        "causality": "not assessed",
        "materialDeadbandVolPoints": 0.5,
        "materialCrossingDefinition": "both endpoints clear opposite sides of +/-0.5 volatility points; equality included",
        "materialPolicyStatus": "provisional; not fit-calibrated; not a rarity claim"
      },
      "statement": "BTC 1M-minus-1W ATM IV slope changed from +4.40 to +2.24 volatility points (-2.16 points). The slope did not cross zero.",
      "currentSourceCanonicalJson": "[{\"asset\":\"BTC\",\"report\":{\"cadence\":\"daily\",\"currency\":\"BTC\",\"currentSnapshotAt\":\"2026-10-18T16:31:00+00:00\",\"previousSnapshotAt\":\"2026-10-17T16:31:00+00:00\",\"reportDate\":\"2026-10-18\",\"sourceSnapshots\":{\"current\":{\"id\":698301,\"timestamp\":\"2026-10-18T16:31:00+00:00\"},\"previous\":{\"id\":688233,\"timestamp\":\"2026-10-17T16:31:00+00:00\"}},\"tenors\":[{\"atmIv\":{\"change\":3.17,\"current\":34.53,\"percentChange\":10.11,\"previous\":31.36},\"availability\":\"available\",\"tenor\":\"1W\",\"unavailableReason\":null},{\"atmIv\":{\"change\":1.01,\"current\":36.77,\"percentChange\":2.82,\"previous\":35.76},\"availability\":\"available\",\"tenor\":\"1M\",\"unavailableReason\":null}],\"windowHours\":24.0}}]",
      "currentSourceSha256": "56bebce25a918bd7b8d9199ebfea4b810c9ac67dc7b85424a4b765f88ef56bf2",
      "materialRegimeChange": false
    }
  ],
  "surfaceDiagnostics": {
    "version": 1,
    "kind": "nativeSurfaceDiagnostics",
    "policy": {
      "version": 1,
      "levelInspectionVolPoints": 10.0,
      "changeInspectionVolPoints": 5.0,
      "basis": "Explicit operational inspection thresholds; not calibrated materiality or quality limits",
      "priority": "daily change spread",
      "fitAssessment": "observations only; no pass/fail calibration",
      "quoteAssessment": "raw quotes are not saved in native report inputs",
      "confirmation": "same pair and exact window; matching signed level gap or change gap at 2W/1M"
    },
    "unit": "volatility points",
    "legs": [
      {
        "asset": "BTC",
        "snapshots": {
          "current": {
            "id": 698301,
            "timestamp": "2026-10-18T16:31:00+00:00"
          },
          "previous": {
            "id": 688233,
            "timestamp": "2026-10-17T16:31:00+00:00"
          }
        },
        "nativeProvenanceStatus": "available",
        "nativeProvenanceReason": null,
        "rawQuotes": {
          "status": "unavailable",
          "unavailableReason": "raw-quote-evidence-not-saved",
          "qualityAssessment": null
        },
        "fit": {
          "status": "available",
          "unavailableReason": null,
          "observations": {
            "currentObjective": 0.21407631,
            "previousObjective": 0.30078661,
            "currentLiveError": 231.87552912,
            "previousLiveError": 215.68016654
          },
          "qualityAssessment": null
        },
        "expiryCoverage": {
          "status": "available",
          "unavailableReason": null,
          "observations": {
            "currentListedExpiries": 12,
            "previousListedExpiries": 12,
            "comparedListedExpiries": 11,
            "fixedTenors": [
              "1W",
              "2W",
              "1M",
              "3M",
              "6M",
              "9M"
            ],
            "suppressedFixedTenors": [
              "1Y"
            ]
          },
          "bracketing": {
            "status": "unavailable",
            "unavailableReason": "listed-expiry-bounds-not-saved"
          }
        },
        "sourceRefs": [
          "rows[asset=BTC].report.sourceSnapshots",
          "rows[asset=BTC].report.fitQuality",
          "rows[asset=BTC].report.coverage",
          "rows[asset=BTC].report.tenors"
        ],
        "status": "available",
        "unavailableReason": null
      }
    ],
    "pairs": [],
    "sourceCanonicalJson": "[{\"asset\":\"BTC\",\"report\":{\"coverage\":{\"comparedListedExpiries\":11,\"currentListedExpiries\":12,\"fixedTenors\":[\"1W\",\"2W\",\"1M\",\"3M\",\"6M\",\"9M\"],\"previousListedExpiries\":12,\"suppressedFixedTenors\":[\"1Y\"]},\"currency\":\"BTC\",\"currentSnapshotAt\":\"2026-10-18T16:31:00+00:00\",\"fitQuality\":{\"currentLiveError\":231.87552912,\"currentObjective\":0.21407631,\"previousLiveError\":215.68016654,\"previousObjective\":0.30078661},\"previousSnapshotAt\":\"2026-10-17T16:31:00+00:00\",\"reportDate\":\"2026-10-18\",\"sourceSnapshots\":{\"current\":{\"id\":698301,\"timestamp\":\"2026-10-18T16:31:00+00:00\"},\"previous\":{\"id\":688233,\"timestamp\":\"2026-10-17T16:31:00+00:00\"}},\"tenors\":[{\"atmIv\":{\"change\":3.17,\"current\":34.53,\"previous\":31.36},\"availability\":\"available\",\"tenor\":\"1W\",\"unavailableReason\":null},{\"atmIv\":{\"change\":2.3,\"current\":35.79,\"previous\":33.49},\"availability\":\"available\",\"tenor\":\"2W\",\"unavailableReason\":null},{\"atmIv\":{\"change\":1.01,\"current\":36.77,\"previous\":35.76},\"availability\":\"available\",\"tenor\":\"1M\",\"unavailableReason\":null}],\"windowHours\":24.0}}]",
    "sourceSha256": "a71331060e66760d38ad19a81b504e5ac86de4fe7481aefdb3b6875ac8f090fe"
  },
  "skewWhipsaw": {
    "version": 1,
    "kind": "nativeTwoDayRr25Whipsaw",
    "tenor": "1W",
    "metric": "rr25",
    "unit": "volatility points",
    "policy": {
      "version": 1,
      "dailyWindowHours": 24,
      "minimumAbsoluteLegVolPoints": 1.0,
      "basis": "Explicit operational inspection threshold on both legs; not calibrated materiality or rarity",
      "endpointPolicy": "three native endpoints; exact adjacent UTC windows and identical shared snapshot ID/value",
      "zeroCrossing": "strict opposite endpoint signs; zero endpoint is a touch",
      "historyScope": "only the preceding native day; no nearest-date substitution or inferred endpoint"
    },
    "observations": [
      {
        "id": "btc-1w-rr25-two-day-whipsaw",
        "asset": "BTC",
        "status": "available",
        "unavailableReason": null,
        "endpoints": [
          {
            "timestamp": "2026-10-16T16:31:00+00:00",
            "snapshotId": 678204,
            "value": -2.65
          },
          {
            "timestamp": "2026-10-17T16:31:00+00:00",
            "snapshotId": 688233,
            "value": -4.46
          },
          {
            "timestamp": "2026-10-18T16:31:00+00:00",
            "snapshotId": 698301,
            "value": -4.11
          }
        ],
        "dailyMoves": [
          -1.81,
          0.35
        ],
        "oppositeMoves": true,
        "inspectionRequired": false,
        "grossMovement": 2.16,
        "netChange": -1.46,
        "zeroCrossings": [
          null,
          null
        ],
        "zeroTouches": [
          false,
          false
        ],
        "statement": "BTC 1W RR25 adjacent daily moves were -1.81 then +0.35 volatility points; gross movement 2.16 versus net -1.46. 0 strict zero crossings. The operational whipsaw inspection threshold is not met."
      }
    ],
    "sourceCanonicalJson": "{\"currentRows\":[{\"asset\":\"BTC\",\"report\":{\"currency\":\"BTC\",\"currentSnapshotAt\":\"2026-10-18T16:31:00+00:00\",\"previousSnapshotAt\":\"2026-10-17T16:31:00+00:00\",\"reportDate\":\"2026-10-18\",\"sourceSnapshots\":{\"current\":{\"id\":698301,\"timestamp\":\"2026-10-18T16:31:00+00:00\"},\"previous\":{\"id\":688233,\"timestamp\":\"2026-10-17T16:31:00+00:00\"}},\"tenors\":[{\"availability\":\"available\",\"rr25\":{\"change\":0.35,\"current\":-4.11,\"previous\":-4.46},\"tenor\":\"1W\",\"unavailableReason\":null}],\"windowHours\":24.0}}],\"historicalRows\":[{\"asset\":\"BTC\",\"report\":{\"currency\":\"BTC\",\"currentSnapshotAt\":\"2026-10-17T16:31:00+00:00\",\"previousSnapshotAt\":\"2026-10-16T16:31:00+00:00\",\"reportDate\":\"2026-10-17\",\"sourceSnapshots\":{\"current\":{\"id\":688233,\"timestamp\":\"2026-10-17T16:31:00+00:00\"},\"previous\":{\"id\":678204,\"timestamp\":\"2026-10-16T16:31:00+00:00\"}},\"tenors\":[{\"availability\":\"available\",\"rr25\":{\"change\":-1.81,\"current\":-4.46,\"previous\":-2.65},\"tenor\":\"1W\",\"unavailableReason\":null}],\"windowHours\":24.0}}]}",
    "sourceSha256": "55b43a4c16fce9d47db44af1521bc34df9ed7cb23bb17ec16fc7b1e47ede9d9b"
  },
  "marketDiary": {
    "schemaVersion": 1,
    "source": "local-news-mcp",
    "generatedAt": "2026-10-18T17:13:25+00:00",
    "window": {
      "startAt": "2026-10-17T16:31:00+00:00",
      "endAt": "2026-10-18T16:31:00+00:00",
      "endExclusive": true
    },
    "headline": "Bitcoin options: 1w ATM implied volatility rises 3.17 points",
    "standfirst": "Bitcoin's 1W ATM implied volatility rose 3.17 volatility points to 34.53% between October 17 and October 18 at 16:31 UTC, according to Derivasys data. Bitcoin's 1W ATM implied volatility had stood at 31.36% at the opening cutoff. This was the largest standard-tenor ATM IV move. The stronger front-end increase narrowed the gap between weekly and monthly implied volatility while leaving the curve positively sloped.",
    "days": [
      {
        "reportDate": "2026-10-18",
        "headline": "Bitcoin options: 1w ATM implied volatility rises 3.17 points",
        "summary": "Bitcoin's 1W ATM implied volatility reached 34.53% at the October 18 cutoff, up 3.17 volatility points from 31.36% at the October 17 cutoff—the largest standard-tenor ATM IV change. Bitcoin's 1M ATM IV rose 1.01 volatility points to 36.77%. Bitcoin's 1M-minus-1W ATM IV slope fell from +4.40 to +2.24 volatility points against the prior daily cutoff, flattening the curve while remaining positive.\n\nIn underlying-market news, [Decrypt reported](https://decrypt.co/381246/bitcoin-etfs-shed-nearly-1-billion-two-weeks-uptober-red) Bitcoin ETF net outflows of $228.6 million for the week, following $681.1 million in the preceding week. The provisional, single-source report describes successive weekly flows, rather than flows over the daily options window. It provides context without establishing a causal link to the 1W implied-volatility move.",
        "macro": {
          "summary": "No qualifying macro event was retained for this report window.",
          "events": []
        },
        "crypto": {
          "summary": "Selected canonical sources are retained below as context.",
          "events": [
            {
              "eventId": "16be05e3-4bd2-4fc2-af36-e46dc75bfc9a",
              "title": "Bitcoin ETFs Shed Nearly $1 Billion in Two Weeks as Uptober Stays Red",
              "publisher": "Decrypt",
              "url": "https://decrypt.co/381246/bitcoin-etfs-shed-nearly-1-billion-two-weeks-uptober-red",
              "publishedAt": "2026-10-18T15:01:04+00:00"
            }
          ]
        }
      }
    ]
  },
  "newsStatus": "context",
  "headline": "Bitcoin options: 1w ATM implied volatility rises 3.17 points",
  "standfirst": "Bitcoin's 1W ATM implied volatility rose 3.17 volatility points to 34.53% between October 17 and October 18 at 16:31 UTC, according to Derivasys data. Bitcoin's 1W ATM implied volatility had stood at 31.36% at the opening cutoff. This was the largest standard-tenor ATM IV move. The stronger front-end increase narrowed the gap between weekly and monthly implied volatility while leaving the curve positively sloped.",
  "leadChart": {
    "asset": "BTC",
    "metric": "atmIv",
    "eventType": "atmIv",
    "label": "1W",
    "current": 34.53,
    "previous": 31.36,
    "change": 3.17,
    "currentSnapshotAt": "2026-10-18T16:31:00+00:00",
    "previousSnapshotAt": "2026-10-17T16:31:00+00:00",
    "evidenceRef": "summaryMetrics.largestAtmMove",
    "provenance": {
      "kind": "report-event",
      "candidateId": "btc-largestAtmMove",
      "candidateSource": "summaryMetrics.largestAtmMove",
      "eventRef": "events[type=atmIv,label=1W]",
      "valuesRef": "tenors[tenor=1W].atmIv"
    },
    "event": {
      "type": "atmIv",
      "title": "Largest standard-tenor ATM IV move",
      "label": "1W",
      "value": 3.17
    }
  },
  "crossAssetMarketContext": {
    "schemaVersion": 1,
    "source": "market-context-mcp",
    "status": "available",
    "asset": "BTC",
    "sessionDate": "2026-10-16",
    "asOfTimestamp": "2026-10-16T20:00:00+00:00",
    "summary": "Latest completed common session retrieved as of 2026-10-18T16:31:00+00:00; all reported metric observation timestamps are 2026-10-16T20:00:00Z. The crypto-minus-SPX realised-volatility spread was 10.94 points, at the 5.8 percentile across 257 prior observations. The 60-session crypto-SPX return correlation was 0.34 from 60 aligned observations.",
    "regimeInsights": [
      "The crypto-minus-SPX realised-volatility spread was 10.94 points, at the 5.8 percentile across 257 prior observations.",
      "The 60-session crypto-SPX return correlation was 0.34 from 60 aligned observations."
    ],
    "metrics": {
      "cryptoAtmIv30d": 36.19,
      "vix": 19.989999771118164,
      "vix9d": 20.1200008392334,
      "vix3m": 20.5,
      "ivSpread": 16.200000228881834,
      "ivRatio": 1.8104052233301084,
      "cryptoRealisedVol20d": 21.39707521556076,
      "spxRealisedVol20": 10.453348661399076,
      "rvSpread": 10.943726554161685,
      "rvRatio": 2.0469110816683482,
      "rvSpreadPercentile": 5.836575875486381,
      "rvSpreadPercentileSampleCount": 257,
      "rvRatioPercentile": 7.782101167315175,
      "rvRatioPercentileSampleCount": 257,
      "returnCorrelation30": 0.5757910709561337,
      "returnCorrelation30SampleCount": 30,
      "returnCorrelation60": 0.3430418814938751,
      "returnCorrelation60SampleCount": 60
    },
    "methodology": "market-context-v1. Crypto snapshot and benchmark timestamps: 2026-10-16T20:00:00Z; ingestion: 2026-10-16T22:30:50.861284Z. Quality valid; freshness fresh, age 160260 seconds evaluated at 2026-10-18T16:31:00Z; alignment tolerance 600 seconds. IV is a 30-calendar-day fixed tenor nearest the US close, ACT/365 convention. Volatility levels and spreads use volatility_points; ratios use ratio; correlations use correlation_coefficient; percentiles use percentile_rank. Crypto RV uses 20 calendar-day close-to-close log returns and sqrt(365); SPX RV uses 20 US trading-session close-to-close log returns and sqrt(252). Correlations use 30/60 aligned US-session daily returns. Sources: Derivasys surface/canonical crypto index and Yahoo Finance ^VIX, ^VIX9D, ^VIX3M, ^GSPC. Other returned cross-asset readings: ivSpreadChange1d=-3.9900006866455087 volatility_points; ivRatioChange1d=-0.4162048640649352 ratio_change; rvSpreadChange1d=-0.5696639798204863 volatility_points; rvRatioChange1d=-0.15102434983895074 ratio_change; ivSpreadPercentile=null and ivRatioPercentile=null, each sampleCount=33; returnCorrelation30Percentile=61.30434782608695, sampleCount=230; returnCorrelation60Percentile=9.411764705882353, sampleCount=170. Level/change metric sampleCount values are null."
  },
  "btcVolContext": {
    "schemaVersion": 1,
    "source": "market-context-mcp",
    "type": "btc_volatility_context_latest",
    "asset": "BTC",
    "asOfTimestamp": "2026-10-18T16:31:00+00:00",
    "status": "available",
    "ds30": {
      "value": 42.69831369937705,
      "units": "volatility_points",
      "sourceTimestamp": "2026-10-18T16:31:00+00:00",
      "observedAt": null,
      "ingestedAt": null,
      "freshness": {
        "status": "fresh",
        "ageSeconds": 0.0,
        "evaluatedAt": "2026-10-18T16:31:00+00:00",
        "maxAgeSeconds": 120.0,
        "sourceMaxAgeSeconds": null,
        "rejectionReasons": []
      },
      "availability": null,
      "methodology": "Derivasys model-free 30-calendar-day implied volatility from fitted BTC SVI slices",
      "comparisonEligible": true
    },
    "bviv": {
      "value": 40.671362366205,
      "units": "volatility_points",
      "sourceTimestamp": "2026-10-18T16:29:56+00:00",
      "observedAt": "2026-10-18T16:30:00+00:00",
      "ingestedAt": "2026-10-18T16:30:00.565000+00:00",
      "freshness": {
        "status": "fresh",
        "ageSeconds": 64.0,
        "evaluatedAt": "2026-10-18T16:31:00+00:00",
        "maxAgeSeconds": 90.0,
        "sourceMaxAgeSeconds": 15.0,
        "rejectionReasons": []
      },
      "availability": "streaming",
      "methodology": "Bitfinex BVIV reference price from the status channel",
      "comparisonEligible": true
    },
    "bvivMinusDs30": {
      "value": -2.0269513331720503,
      "units": "volatility_points",
      "status": "available",
      "methodology": "BVIV minus independently selected latest eligible DS30 at or before the requested cutoff"
    }
  },
  "editorialContext": {
    "version": 2,
    "status": "active",
    "scope": "daily options-surface movements",
    "statement": null,
    "chosenStoryId": "btc-largestAtmMove",
    "preferredLeadId": null,
    "eligibilityTests": {
      "dailySingleAsset": true,
      "completeNativeDailySurface": true,
      "allSurfaceHistoryEligible": true,
      "noExceptionalSupportedSurfaceEvent": false,
      "supportedAtmLeadAvailable": true,
      "chosenAtmLead": true
    },
    "nativeObservations": [
      {
        "id": "btc-largestAtmMove",
        "tenor": "1W",
        "metric": "atmIv",
        "current": 34.53,
        "previous": 31.36,
        "change": 3.17
      },
      {
        "id": "btc-1m-minus-1w-atm-regime-change",
        "tenor": "1M minus 1W",
        "metric": "termStructureDivergence",
        "current": 2.24,
        "previous": 4.4,
        "change": -2.16
      },
      {
        "id": "btc-largestBf25Move",
        "tenor": "6M",
        "metric": "bf25",
        "current": 2.06,
        "previous": 2.22,
        "change": -0.16
      },
      {
        "id": "btc-largestRr25Move",
        "tenor": "2W",
        "metric": "rr25",
        "current": -3.75,
        "previous": -4.2,
        "change": 0.45
      }
    ],
    "strongCandidateIds": [
      "btc-largestAtmMove",
      "btc-largestBf25Move"
    ],
    "supportingContext": [
      {
        "id": "btc-spot-24h",
        "historicalContext": {
          "status": "available",
          "observationKind": "change",
          "basis": "absolute 24h exact index endpoint returns observed from stored prices in this run; same UTC clock; historical windows end at or before current period start; rolling historical windows may overlap each other; not original past published prices",
          "percentile": 8.5,
          "observations": 59,
          "minimumObservations": 20,
          "window": {
            "start": "2026-08-19T16:31:00+00:00",
            "end": "2026-10-17T16:31:00+00:00"
          },
          "sourceRefs": [
            "realisedVolatility.spotReturns.windows.24h",
            "realisedVolatility.spotReturns.points"
          ],
          "unavailableReason": null,
          "sourceSha256": "faeac3ac8a760a62ca6b5536bad7e51d48318b043b64fba44602706e21231e1f"
        }
      },
      {
        "id": "btc-implied-realised-7d",
        "historicalContext": {
          "status": "unavailable",
          "observationKind": "level",
          "basis": "matching stored history unavailable",
          "percentile": null,
          "observations": null,
          "minimumObservations": 20,
          "window": {
            "start": null,
            "end": null
          },
          "sourceRefs": [
            "realisedVolatility.oneWeekIvMinus7dRvPoints"
          ],
          "unavailableReason": "history-status-unavailable-or-invalid"
        }
      },
      {
        "id": "btc-smile-rotation",
        "historicalContext": {
          "status": "unavailable",
          "observationKind": "change",
          "basis": "matching stored history unavailable",
          "percentile": null,
          "observations": null,
          "minimumObservations": 20,
          "window": {
            "start": null,
            "end": null
          },
          "sourceRefs": [
            "surfaceEvents[rotation]"
          ],
          "unavailableReason": "history-status-unavailable-or-invalid"
        }
      }
    ],
    "policy": {
      "version": 2,
      "routinePercentileUpperExclusive": 80,
      "minimumHistoryObservations": 20,
      "basis": "Operational routine threshold; not calibrated market materiality or a trading recommendation"
    },
    "sourceSha256": "02425565a3a0265a299ed38d12198f705f2db1978681320b674d8c2408388177",
    "sourceCanonicalJson": "{\"candidates\":[{\"asset\":\"BTC\",\"change\":3.17,\"current\":34.53,\"expiry\":null,\"headlinePolicyVersion\":2,\"historicalContext\":{\"basis\":\"absolute matching cadence moves in prior 30 days\",\"minimumObservations\":20,\"observationKind\":\"change\",\"observations\":23,\"percentile\":87.0,\"provenance\":{\"observationHorizonDays\":1,\"periodsOverlap\":false,\"sampleCount\":23,\"sampleWindow\":{\"endDate\":\"2026-10-17\",\"endSnapshotAt\":\"2026-10-17T16:31:00+00:00\",\"startDate\":\"2026-09-17\",\"startSnapshotAt\":\"2026-09-17T16:31:00+00:00\"},\"samplingCadence\":\"daily UTC observations\",\"sourceDigest\":\"sha256:1333424d57af51ec0a39754b3672e16b9669c4329baacd71cb01a4877e0719ec\"},\"sourceRefs\":[\"summaryMetrics.largestAtmMove.historicalSignificance.movePercentile30d\"],\"status\":\"available\",\"unavailableReason\":null,\"window\":{\"end\":null,\"start\":null}},\"historicalLevelPercentile\":null,\"historicalPercentile\":87.0,\"historicalZScore\":1.1264,\"id\":\"btc-largestAtmMove\",\"laggard\":null,\"leader\":null,\"metric\":\"atmIv\",\"metricLabel\":\"ATM IV\",\"observationKind\":\"change\",\"previous\":31.36,\"relativeChangePercent\":10.1084,\"scope\":\"single-asset\",\"score\":34.172,\"scoreComponents\":{\"evidenceQuality\":1.0,\"formula\":\"(2 * min(abs(observation) / metric scale, 20) + rarity * historical magnitude scale) * evidence quality; validated dispersion lower tail <= 10 uses scale 1\",\"historicalBonus\":27.832,\"historicalMagnitudeScale\":1.0,\"magnitudeScale\":1.0,\"magnitudeScore\":6.34,\"normalizedMagnitude\":3.17,\"rarity\":{\"magnitudeIndependent\":false,\"percentile\":87.0,\"policyVersion\":1,\"tail\":\"upper\",\"tailDistance\":37.0},\"selectionAdjustment\":0.0,\"selectionScore\":34.172,\"totalScore\":34.172,\"unit\":\"volatility points\",\"version\":3},\"selectionReason\":\"Deterministic metric-scaled magnitude, matching historical rarity, evidence availability and validated coordination/crossings; ties ordered by candidate ID\",\"selectionScore\":34.172,\"source\":\"summaryMetrics.largestAtmMove\",\"story\":\"BTC 1W ATM IV moved higher by 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          "sourceProjection": "immutable consumed identity, timestamp, tenor availability and ATM endpoint fields; no marginal percentile inputs"
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        "statement": "BTC 1M-minus-1W ATM IV slope changed from +4.40 to +2.24 volatility points (-2.16 points). The slope did not cross zero.",
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      "headlinePolicyVersion": 2
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    {
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      "asset": "BTC",
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      "metricLabel": "BF25",
      "tenor": "6M",
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        "sourceRefs": [
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        "formula": "(2 * min(abs(observation) / metric scale, 20) + rarity * historical magnitude scale) * evidence quality; validated dispersion lower tail <= 10 uses scale 1",
        "selectionAdjustment": -10.771,
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      "story": "BTC 6M BF25 moved lower by 0.16",
      "source": "summaryMetrics.largestBf25Move",
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      "selectionScore": 3.590325,
      "selectionReason": "A butterfly adjustment below 0.25 points is supporting detail",
      "headlinePolicyVersion": 2
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    {
      "id": "btc-largestRr25Move",
      "asset": "BTC",
      "metric": "rr25",
      "metricLabel": "RR25",
      "tenor": "2W",
      "expiry": null,
      "observationKind": "change",
      "change": 0.45,
      "current": -3.75,
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        "window": {
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        "sourceRefs": [
          "summaryMetrics.largestRr25Move.historicalSignificance.movePercentileFullHistory"
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        "unavailableReason": null,
        "provenance": {
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          "samplingCadence": "daily UTC observations",
          "periodsOverlap": false,
          "sampleWindow": {
            "startDate": "2026-08-29",
            "endDate": "2026-10-17",
            "startSnapshotAt": "2026-08-29T16:31:00+00:00",
            "endSnapshotAt": "2026-10-17T16:31:00+00:00"
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          "sourceDigest": "sha256:3ee6d1606c01139b75e09b4d97d3b3ddb1bfd162efe0c523c0271c28010e8b81"
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      "scoreComponents": {
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        "historicalBonus": 0.0,
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        "rarity": {
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        "formula": "(2 * min(abs(observation) / metric scale, 20) + rarity * historical magnitude scale) * evidence quality; validated dispersion lower tail <= 10 uses scale 1",
        "selectionAdjustment": 0.0,
        "selectionScore": 0.9
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      "story": "BTC 2W RR25 moved higher by 0.45",
      "source": "summaryMetrics.largestRr25Move",
      "scope": "single-asset",
      "leader": null,
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      "selectionScore": 0.9,
      "selectionReason": "Deterministic metric-scaled magnitude, matching historical rarity, evidence availability and validated coordination/crossings; ties ordered by candidate ID",
      "headlinePolicyVersion": 2
    },
    {
      "id": "btc-spot-24h",
      "asset": "BTC",
      "metric": "spot",
      "metricLabel": "spot",
      "tenor": null,
      "expiry": null,
      "observationKind": "change",
      "change": -0.15,
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      "historicalZScore": -1.3722,
      "score": 0.15,
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        "observationKind": "change",
        "basis": "absolute 24h exact index endpoint returns observed from stored prices in this run; same UTC clock; historical windows end at or before current period start; rolling historical windows may overlap each other; not original past published prices",
        "percentile": 8.5,
        "observations": 59,
        "minimumObservations": 20,
        "window": {
          "start": "2026-08-19T16:31:00+00:00",
          "end": "2026-10-17T16:31:00+00:00"
        },
        "sourceRefs": [
          "realisedVolatility.spotReturns.windows.24h",
          "realisedVolatility.spotReturns.points"
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        "unavailableReason": null,
        "sourceSha256": "faeac3ac8a760a62ca6b5536bad7e51d48318b043b64fba44602706e21231e1f"
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      "scoreComponents": {
        "version": 3,
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        "magnitudeScale": 2.0,
        "normalizedMagnitude": 0.075,
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        "historicalMagnitudeScale": 0.075,
        "historicalBonus": 0.0,
        "evidenceQuality": 1.0,
        "totalScore": 0.15,
        "rarity": {
          "policyVersion": 1,
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          "percentile": 8.5,
          "tailDistance": 0.0,
          "magnitudeIndependent": false
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        "formula": "(2 * min(abs(observation) / metric scale, 20) + rarity * historical magnitude scale) * evidence quality; validated dispersion lower tail <= 10 uses scale 1",
        "selectionAdjustment": 0.0,
        "selectionScore": 0.15
      },
      "story": "BTC spot-index return was -0.15% over 24 hours",
      "source": "realisedVolatility.spotMove24hPercent",
      "scope": "single-asset",
      "leader": null,
      "laggard": null,
      "metricWindow": "24h",
      "spotReturnEvidence": {
        "status": "available",
        "startAt": "2026-10-17T16:31:00+00:00",
        "endAt": "2026-10-18T16:31:00+00:00",
        "startEndpoint": {
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          "price": 81158.64,
          "venue": "canonical",
          "instrument": "BTC-USD-INDEX",
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          "sourceVenue": "deribit",
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        "endEndpoint": {
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          "price": 81037.4,
          "venue": "canonical",
          "instrument": "BTC-USD-INDEX",
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          "sourceVenue": "deribit",
          "sourceInstrument": "btc_usd",
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        "valuePercent": -0.15,
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      "selectionScore": 0.15,
      "selectionReason": "Deterministic metric-scaled magnitude, matching historical rarity, evidence availability and validated coordination/crossings; ties ordered by candidate ID",
      "headlinePolicyVersion": 2
    },
    {
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s_lower_expiry\":true,\"has_upper_expiry\":true,\"is_extrapolated\":false,\"label\":\"1W\",\"risk_reversal_nodes_json\":{\"10C\":{\"delta\":0.09999999987911765,\"delta_error\":-1.2088235967766536e-10,\"label\":\"10C\",\"log_moneyness\":0.05269396854440253,\"option_type\":\"call\",\"strike\":86003.0993784133,\"target_delta\":0.1,\"vol\":29.4},\"10P\":{\"delta\":-0.10000000533693364,\"delta_error\":-5.336933631139296e-09,\"label\":\"10P\",\"log_moneyness\":-0.060847982416851513,\"option_type\":\"put\",\"strike\":76772.10698823616,\"target_delta\":-0.1,\"vol\":35.25},\"15C\":{\"delta\":0.150000007171018,\"delta_error\":7.1710180016282266e-09,\"label\":\"15C\",\"log_moneyness\":0.04183179297605691,\"option_type\":\"call\",\"strike\":85073.97391088468,\"target_delta\":0.15,\"vol\":28.78},\"15P\":{\"delta\":-0.14999999545486012,\"delta_error\":4.54513987557803e-09,\"label\":\"15P\",\"log_moneyness\":-0.04615295566902421,\"option_type\":\"put\",\"strike\":77908.6051376964,\"target_delta\":-0.15,\"vol\":33.17},\"20C\":{\"delta\":0.19999999983699615,\"delta_error\":-1.630038604094608e-10,\"label\":\"20C\",\"log_moneyness\":0.033746777195015724,\"option_type\":\"call\",\"strike\":84388.92254647473,\"target_delta\":0.2,\"vol\":28.48},\"20P\":{\"delta\":-0.2000000061396268,\"delta_error\":-6.1396267792002135e-09,\"label\":\"20P\",\"log_moneyness\":-0.03587936591765374,\"option_type\":\"put\",\"strike\":78713.13179715916,\"target_delta\":-0.2,\"vol\":31.89},\"25C\":{\"delta\":0.250000002852496,\"delta_error\":2.8524960171694147e-09,\"label\":\"25C\",\"log_moneyness\":0.027060753208710073,\"option_type\":\"call\",\"strike\":83826.57820489648,\"target_delta\":0.25,\"vol\":28.34},\"25P\":{\"delta\":-0.24999999324133768,\"delta_error\":6.7586623242466e-09,\"label\":\"25P\",\"log_moneyness\":-0.02778888522215134,\"option_type\":\"put\",\"strike\":79352.54195043849,\"target_delta\":-0.25,\"vol\":30.99},\"30C\":{\"delta\":0.2999999957295884,\"delta_error\":-4.270411579909705e-09,\"label\":\"30C\",\"log_moneyness\":0.02118010421374268,\"option_type\":\"call\",\"strike\":83335.0701316975,\"target_delta\":0.3,\"vol\":28.31},\"30P\":{\"delta\":-0.30000000501462054,\"delta_error\":-5.014620552135085e-09,\"label\":\"30P\",\"log_moneyness\":-0.02096128196983474,\"option_type\":\"put\",\"strike\":79896.18339611852,\"target_delta\":-0.3,\"vol\":30.33},\"35C\":{\"delta\":0.35000000564662337,\"delta_error\":5.646623391086791e-09,\"label\":\"35C\",\"log_moneyness\":0.015786734928475855,\"option_type\":\"call\",\"strike\":82886.8231912702,\"target_delta\":0.35,\"vol\":28.35},\"35P\":{\"delta\":-0.3499999988534541,\"delta_error\":1.1465458582549104e-09,\"label\":\"35P\",\"log_moneyness\":-0.014925591891903634,\"option_type\":\"put\",\"strike\":80379.87022101822,\"target_delta\":-0.35,\"vol\":29.81},\"40C\":{\"delta\":0.40000000586087114,\"delta_error\":5.860871121754485e-09,\"label\":\"40C\",\"log_moneyness\":0.010681785837584855,\"option_type\":\"call\",\"strike\":82464.76837931713,\"target_delta\":0.4,\"vol\":28.45},\"40P\":{\"delta\":-0.3999999986333619,\"delta_error\":1.3666381359911384e-09,\"label\":\"40P\",\"log_moneyness\":-0.009403061559689561,\"option_type\":\"put\",\"strike\":80824.99847825884,\"target_delta\":-0.4,\"vol\":29.4},\"5C\":{\"delta\":0.0499999929759894,\"delta_error\":-7.024010602318942e-09,\"label\":\"5C\",\"log_moneyness\":0.0711659193647169,\"option_type\":\"call\",\"strike\":87606.50785002127,\"target_delta\":0.05,\"vol\":31.01},\"5P\":{\"delta\":-0.049999998489464986,\"delta_error\":1.5105350165134368e-09,\"label\":\"5P\",\"log_moneyness\":-0.08832262658509121,\"option_type\":\"put\",\"strike\":74691.53305707611,\"target_delta\":-0.05,\"vol\":39.76},\"AMTF\":{\"delta\":0.5000000066045236,\"delta_error\":6.6045235946887715e-09,\"label\":\"AMTF\",\"log_moneyness\":0.0,\"option_type\":\"call\",\"strike\":81588.58531533008,\"target_delta\":0.5,\"vol\":28.8}},\"risk_reversals_json\":{\"rr_05\":-8.75,\"rr_10\":-5.85,\"rr_15\":-4.39,\"rr_20\":-3.41,\"rr_25\":-2.65,\"rr_30\":-2.02,\"rr_35\":-1.46,\"rr_40\":-0.95},\"row_kind\":\"fixed_tenor\"}],\"qualityPolicy\":\"fixed_tenor; non-extrapolated; listed expiry bracket on both sides\",\"source\":\"native-fixed-tenor-history\",\"sourceDigest\":\"sha256:be5bb7a69b1a0a1c871c7ad4dd1739a32c8d46a7526f6ee5246d47245a4f121e\",\"timestamp\":\"2026-10-16T16:31:00+00:00\"}},\"tenors\":[{\"atmIv\":{\"change\":2.56,\"current\":31.36,\"percentChange\":8.89,\"previous\":28.8},\"availability\":\"available\",\"tenor\":\"1W\",\"unavailableReason\":null},{\"atmIv\":{\"change\":0.59,\"current\":35.76,\"percentChange\":1.68,\"previous\":35.17},\"availability\":\"available\",\"tenor\":\"1M\",\"unavailableReason\":null}],\"windowHours\":24}}]]",
          "window": {
            "startAt": "2026-08-29T16:31:00+00:00",
            "endAt": "2026-10-17T16:31:00+00:00"
          },
          "sourceProjection": "immutable consumed identity, timestamp, tenor availability and ATM endpoint fields; no marginal percentile inputs"
        },
        "policy": {
          "version": 2,
          "slopeDefinition": "1M ATM IV minus 1W ATM IV",
          "dailyWindowHours": {
            "minimum": 23,
            "maximum": 25
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          "samplingClockToleranceSeconds": 0,
          "minimumHistoryObservations": 20,
          "crossingDefinition": "strictly negative to strictly positive, or strictly positive to strictly negative",
          "zeroHandling": "an exactly zero endpoint is a zero touch, not a genuine sign crossing",
          "rarityBasis": "absolute slope changes in compatible prior daily observations of this asset and these tenors",
          "causality": "not assessed",
          "materialDeadbandVolPoints": 0.5,
          "materialCrossingDefinition": "both endpoints clear opposite sides of +/-0.5 volatility points; equality included",
          "materialPolicyStatus": "provisional; not fit-calibrated; not a rarity claim"
        },
        "statement": "BTC 1M-minus-1W ATM IV slope changed from +4.40 to +2.24 volatility points (-2.16 points). The slope did not cross zero.",
        "currentSourceCanonicalJson": "[{\"asset\":\"BTC\",\"report\":{\"cadence\":\"daily\",\"currency\":\"BTC\",\"currentSnapshotAt\":\"2026-10-18T16:31:00+00:00\",\"previousSnapshotAt\":\"2026-10-17T16:31:00+00:00\",\"reportDate\":\"2026-10-18\",\"sourceSnapshots\":{\"current\":{\"id\":698301,\"timestamp\":\"2026-10-18T16:31:00+00:00\"},\"previous\":{\"id\":688233,\"timestamp\":\"2026-10-17T16:31:00+00:00\"}},\"tenors\":[{\"atmIv\":{\"change\":3.17,\"current\":34.53,\"percentChange\":10.11,\"previous\":31.36},\"availability\":\"available\",\"tenor\":\"1W\",\"unavailableReason\":null},{\"atmIv\":{\"change\":1.01,\"current\":36.77,\"percentChange\":2.82,\"previous\":35.76},\"availability\":\"available\",\"tenor\":\"1M\",\"unavailableReason\":null}],\"windowHours\":24.0}}]",
        "currentSourceSha256": "56bebce25a918bd7b8d9199ebfea4b810c9ac67dc7b85424a4b765f88ef56bf2",
        "materialRegimeChange": false
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    ]
  },
  "editorialRead": {
    "version": 3,
    "kind": "reportEditorialRead",
    "identity": {
      "family": "BTC",
      "cadence": "daily",
      "reportDate": "2026-10-18",
      "currentSnapshotAt": "2026-10-18T16:31:00+00:00",
      "previousSnapshotAt": "2026-10-17T16:31:00+00:00",
      "assets": [
        "BTC"
      ]
    },
    "source": {
      "encoding": "ieee754-binary64-hex-v1",
      "currentProjection": {
        "nativeIdentity": {
          "currency": "BTC",
          "reportDate": "2026-10-18",
          "currentSnapshotAt": "2026-10-18T16:31:00+00:00",
          "previousSnapshotAt": "2026-10-17T16:31:00+00:00",
          "windowHours": 24.0,
          "sourceSnapshots": {
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              "id": 698301,
              "timestamp": "2026-10-18T16:31:00+00:00"
            },
            "previous": {
              "id": 688233,
              "timestamp": "2026-10-17T16:31:00+00:00"
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          }
        },
        "identity": {
          "family": "BTC",
          "cadence": "daily",
          "reportDate": "2026-10-18",
          "currentSnapshotAt": "2026-10-18T16:31:00+00:00",
          "previousSnapshotAt": "2026-10-17T16:31:00+00:00",
          "assets": [
            "BTC"
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        },
        "rows": [
          {
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            "report": {
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              "reportDate": "2026-10-18",
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                  "timestamp": "2026-10-17T16:31:00+00:00"
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              },
              "tenors": [
                {
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                  "unavailableReason": null,
                  "atmIv": {
                    "current": 34.53,
                    "previous": 31.36,
                    "change": 3.17
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                  "rr25": {
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                    "change": 0.35
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                  "bf25": {
                    "current": 2.13,
                    "previous": 2.0,
                    "change": 0.13
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                },
                {
                  "tenor": "2W",
                  "availability": "available",
                  "unavailableReason": null,
                  "atmIv": {
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                    "previous": 33.49,
                    "change": 2.3
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                  "rr25": {
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                    "change": 0.45
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                  "bf25": {
                    "current": 2.01,
                    "previous": 2.04,
                    "change": -0.03
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                },
                {
                  "tenor": "1M",
                  "availability": "available",
                  "unavailableReason": null,
                  "atmIv": {
                    "current": 36.77,
                    "previous": 35.76,
                    "change": 1.01
                  },
                  "rr25": {
                    "current": -3.32,
                    "previous": -3.12,
                    "change": -0.2
                  },
                  "bf25": {
                    "current": 2.06,
                    "previous": 2.14,
                    "change": -0.08
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                },
                {
                  "tenor": "3M",
                  "availability": "available",
                  "unavailableReason": null,
                  "atmIv": {
                    "current": 36.95,
                    "previous": 36.67,
                    "change": 0.28
                  },
                  "rr25": {
                    "current": -2.55,
                    "previous": -2.28,
                    "change": -0.27
                  },
                  "bf25": {
                    "current": 2.17,
                    "previous": 2.22,
                    "change": -0.05
                  }
                },
                {
                  "tenor": "6M",
                  "availability": "available",
                  "unavailableReason": null,
                  "atmIv": {
                    "current": 37.74,
                    "previous": 37.69,
                    "change": 0.05
                  },
                  "rr25": {
                    "current": -1.78,
                    "previous": -1.62,
                    "change": -0.16
                  },
                  "bf25": {
                    "current": 2.06,
                    "previous": 2.22,
                    "change": -0.16
                  }
                },
                {
                  "tenor": "9M",
                  "availability": "available",
                  "unavailableReason": null,
                  "atmIv": {
                    "current": 38.23,
                    "previous": 38.22,
                    "change": 0.01
                  },
                  "rr25": {
                    "current": -1.57,
                    "previous": -1.41,
                    "change": -0.16
                  },
                  "bf25": {
                    "current": 2.11,
                    "previous": 2.25,
                    "change": -0.14
                  }
                },
                {
                  "tenor": "1Y",
                  "availability": "unavailable",
                  "unavailableReason": "The target tenor falls outside the listed-expiry range at one or both snapshots; extrapolated values are suppressed.",
                  "atmIv": {
                    "current": null,
                    "previous": null,
                    "change": null
                  },
                  "rr25": {
                    "current": null,
                    "previous": null,
                    "change": null
                  },
                  "bf25": {
                    "current": null,
                    "previous": null,
                    "change": null
                  }
                }
              ],
              "realisedVolatility": {
                "spotMove24hPercent": -0.15,
                "spotMove7dPercent": -3.27,
                "spotReturns": {
                  "schemaVersion": 1,
                  "asset": "BTC",
                  "cutoffAt": "2026-10-18T16:31:00+00:00",
                  "windows": {
                    "24h": {
                      "status": "available",
                      "startAt": "2026-10-17T16:31:00+00:00",
                      "endAt": "2026-10-18T16:31:00+00:00",
                      "startEndpoint": {
                        "timestamp": "2026-10-17T16:31:00+00:00",
                        "price": 81158.64,
                        "venue": "canonical",
                        "instrument": "BTC-USD-INDEX",
                        "fallback": false,
                        "sourceVenue": "deribit",
                        "sourceInstrument": "btc_usd",
                        "unavailableReason": null
                      },
                      "endEndpoint": {
                        "timestamp": "2026-10-18T16:31:00+00:00",
                        "price": 81037.4,
                        "venue": "canonical",
                        "instrument": "BTC-USD-INDEX",
                        "fallback": false,
                        "sourceVenue": "deribit",
                        "sourceInstrument": "btc_usd",
                        "unavailableReason": null
                      },
                      "valuePercent": -0.15,
                      "unavailableReason": null
                    }
                  }
                }
              }
            }
          }
        ],
        "lead": {
          "asset": "BTC",
          "metric": "atmIv",
          "tenor": "1W"
        }
      },
      "currentProjectionSha256": "c089760aef8ee30b0dc9dbd3327a51ef1e96958d5b80d77a7f69939ccb4a8d33",
      "prior": {
        "artifactPath": "/v1/btc/daily/2026-10-17/ae4c22a3bec4943fda109e927e3e192ffdfe18ea9f65bafa6585fd0081e6702f.json",
        "sha256": "ae4c22a3bec4943fda109e927e3e192ffdfe18ea9f65bafa6585fd0081e6702f",
        "reportDate": "2026-10-17",
        "family": "BTC",
        "cadence": "daily",
        "projection": {
          "nativeIdentity": {
            "currency": "BTC",
            "reportDate": "2026-10-17",
            "currentSnapshotAt": "2026-10-17T16:31:00+00:00",
            "previousSnapshotAt": "2026-10-16T16:31:00+00:00",
            "windowHours": 24.0,
            "sourceSnapshots": {
              "current": {
                "id": 688233,
                "timestamp": "2026-10-17T16:31:00+00:00"
              },
              "previous": {
                "id": 678204,
                "timestamp": "2026-10-16T16:31:00+00:00"
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            }
          },
          "identity": {
            "family": "BTC",
            "cadence": "daily",
            "reportDate": "2026-10-17",
            "currentSnapshotAt": "2026-10-17T16:31:00+00:00",
            "previousSnapshotAt": "2026-10-16T16:31:00+00:00",
            "assets": [
              "BTC"
            ]
          },
          "rows": [
            {
              "asset": "BTC",
              "report": {
                "currency": "BTC",
                "reportDate": "2026-10-17",
                "currentSnapshotAt": "2026-10-17T16:31:00+00:00",
                "previousSnapshotAt": "2026-10-16T16:31:00+00:00",
                "windowHours": 24.0,
                "sourceSnapshots": {
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                    "timestamp": "2026-10-17T16:31:00+00:00"
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