{
  "schemaVersion": 3,
  "reportDate": "2026-10-17",
  "generatedAt": "2026-10-17T17:02:48+00:00",
  "currentSnapshotAt": "2026-10-17T16:31:00+00:00",
  "previousSnapshotAt": "2026-10-10T16:31:00+00:00",
  "sourceSnapshots": {
    "current": {
      "id": 688233,
      "timestamp": "2026-10-17T16:31:00+00:00"
    },
    "previous": {
      "id": 617952,
      "timestamp": "2026-10-10T16:31:00+00:00"
    }
  },
  "windowHours": 168.0,
  "currency": "BTC",
  "methodology": {
    "source": "Derivasys proprietary historical SVI surface and canonical BTC index databases",
    "comparison": "Nearest successful surface snapshots approximately seven days 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.",
    "snapshotSelection": "The final successful BTC surface on each observed UTC date is included. This report contains 8 daily snapshots; an approximately seven-day window contains eight observations when both the start and end dates are present.",
    "dailyReportInputs": "The weekly edition reuses 8 stored daily reports from 2026-10-10 through 2026-10-17; their stored headlines, reader summaries, news outcomes and principal ATM facts form the daily report trail. Daily report trail coverage is complete. Published historical inputs are SHA-256 verified and pinned with their manifest; offline replay reuses those exact bytes. Daily surface observations are separate from stored daily reports.",
    "realisedVolatilityInput": "Full same-date frozen daily BTC realised-volatility object, validated against the same current snapshot cutoff, canonical index source, declared 7d coverage policy and current 1W ATM IV. Missing, stale or ineligible inputs remain unavailable.",
    "spotReturns": "Exact seven-day index endpoint return ending at each asset's current snapshot; surface comparisons may span a different interval; not a forecast."
  },
  "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": "2026-10-17T16:31:00+00:00",
    "spotWindowStart": "2026-10-16T16:31:00+00:00",
    "spotMetric": "spot-index return",
    "spotUnit": "percent",
    "spotMove24hPercent": -0.42,
    "rv24hPercent": 26.31,
    "rv7dPercent": 34.07,
    "rv30dPercent": 33.68,
    "observations": {
      "24h": 1440,
      "7d": 10080,
      "30d": 43200
    },
    "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
      }
    },
    "coveragePolicy": {
      "version": "observed-minute-returns-v1",
      "minimumCoveragePercent": null,
      "minimumCoveragePercentByWindow": {
        "24h": 98.0,
        "7d": 97.0,
        "30d": 99.5
      },
      "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,
    "spotReturns": {
      "schemaVersion": 1,
      "asset": "BTC",
      "cutoffAt": "2026-10-17T16:31:00+00:00",
      "sourceSha256": "a0afe50d528dec2d8f14ddd1405b4aa451d4a5d00a48a8ea026e36cbbd75b508",
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    "model": "gpt-6.1-sol",
    "headline": "Bitcoin options: 1w RR25 falls further toward puts",
    "executiveSummary": "From October 10, 2026 at 16:31 UTC to October 17, 2026 at 16:31 UTC, Bitcoin 1W RR25 moved from -3.02 to -4.46 volatility points, a decline of 1.44 points. The more negative call-minus-put reading indicates higher put volatility relative to calls. RR25 also declined across Bitcoin’s other available headline tenors, broadening the weekly skew adjustment.\n\nBitcoin’s seven-day spot-index return was -2.14%. Meanwhile, 2W ATM implied volatility rose 1.43 volatility points to 33.49%, the largest standard-tenor ATM increase over the reporting interval. At the cutoff, 1W ATM implied volatility stood at 31.36%, 2.71 volatility points below seven-day realised volatility of 34.07%; that gap alone does not establish whether options are cheap or expensive.",
    "evidenceIds": [
      "rr25",
      "front-atm",
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      "spot-index-7d"
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    "newsSummary": "In developing, single-source coverage published October 15, [Cointelegraph reported](https://cointelegraph.com/markets/bitcoin-etf-outflow-btc-below-82k) $151 million in net Bitcoin ETF outflows since Monday, following $681 million withdrawn the preceding week. Those partial-week fund flows provide context for Bitcoin’s institutional backdrop, but the reporting does not establish a measured link to the weekly skew change.",
    "marketContextSummary": "",
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        "label": "Implied versus realised",
        "text": "At the 16:31 UTC cutoff, 1W ATM IV was 31.36%, 2.71 volatility points below seven-day realised volatility of 34.07%; 24-hour realised volatility was 26.31% and 30-day realised volatility was 33.68%."
      },
      {
        "id": "front-atm",
        "label": "Front end",
        "text": "Front-end ATM IV increased, averaging +0.93 volatility points to 33.54% across 1W, 2W and 1M."
      },
      {
        "id": "back-atm",
        "label": "Long end",
        "text": "Long-dated ATM IV decreased, averaging -0.32 volatility points to 37.69% across 6M and 1Y."
      },
      {
        "id": "rr25",
        "label": "Skew",
        "text": "RR25 moved towards puts, averaging -0.78 volatility points to -3.14% across the six headline tenors."
      },
      {
        "id": "bf25",
        "label": "Convexity",
        "text": "BF25 increased, averaging +0.13 volatility points to 2.12% across the six headline tenors."
      },
      {
        "id": "largest-standard-tenor",
        "label": "Largest standard-tenor move",
        "text": "The largest standard-tenor ATM IV move was +1.43 volatility points at 2W, to 33.49%.",
        "tenor": "2W",
        "value": 1.43
      },
      {
        "id": "spot-index-24h",
        "label": "24h spot-index return",
        "text": "BTC spot-index return was -0.42% over 24 hours.",
        "source": "realisedVolatility.spotReturns.windows.24h"
      },
      {
        "id": "spot-index-7d",
        "label": "7d spot-index return",
        "text": "BTC spot-index return was -2.14% over seven days.",
        "source": "realisedVolatility.spotReturns.windows.7d"
      }
    ]
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        "selection_reason": "Retained as contemporaneous price context alongside Forward 23OCT26: -1794.87 USD (-2.16%) to 81307.08 USD; the surface data does not establish a causal relationship.",
        "primary_article": {
          "id": "ec254fba-3e6b-499b-aa20-221216cc6108",
          "sourceId": "cointelegraph",
          "publisher": "Cointelegraph",
          "title": "Bitcoin ETFs shed $261M as XRP funds buck weekly outflow trend",
          "url": "https://cointelegraph.com/markets/bitcoin-etf-outflow-btc-below-82k",
          "publishedAt": "2026-10-15T07:23:43+00:00",
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          "matchedTerms": [
            "BTC",
            "Bitcoin",
            "Bitcoin ETFs",
            "XRP"
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          "selection_reason": "Retained as contemporaneous price context alongside Forward 23OCT26: -1794.87 USD (-2.16%) to 81307.08 USD; the surface data does not establish a causal relationship.",
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      "snapshotAt": "2026-10-10T23:59:00+00:00",
      "tenors": {
        "1W": {
          "atmIv": 31.38,
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          "bf25": 1.74
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        "2W": {
          "atmIv": 32.47,
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        "1M": {
          "atmIv": 35.15,
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          "bf25": 1.93
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        "3M": {
          "atmIv": 37.16,
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          "bf25": 2.25
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        "6M": {
          "atmIv": 38.05,
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        "9M": {
          "atmIv": 38.59,
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        "1Y": {
          "atmIv": 39.08,
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    {
      "date": "2026-10-11",
      "snapshotAt": "2026-10-11T23:59:00+00:00",
      "tenors": {
        "1W": {
          "atmIv": 32.14,
          "rr25": -3.14,
          "bf25": 1.84
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        "2W": {
          "atmIv": 32.83,
          "rr25": -3.28,
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        "1M": {
          "atmIv": 35.41,
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          "bf25": 2.0
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        "3M": {
          "atmIv": 37.31,
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        "6M": {
          "atmIv": 38.13,
          "rr25": -1.36,
          "bf25": 2.38
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        "9M": {
          "atmIv": 38.64,
          "rr25": -1.05,
          "bf25": 2.41
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        "1Y": {
          "atmIv": 39.06,
          "rr25": -0.57,
          "bf25": 2.43
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    {
      "date": "2026-10-12",
      "snapshotAt": "2026-10-12T23:59:00+00:00",
      "tenors": {
        "1W": {
          "atmIv": 33.79,
          "rr25": -2.78,
          "bf25": 1.8
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        "2W": {
          "atmIv": 33.94,
          "rr25": -3.39,
          "bf25": 1.81
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        "1M": {
          "atmIv": 35.98,
          "rr25": -2.56,
          "bf25": 1.96
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        "3M": {
          "atmIv": 37.54,
          "rr25": -1.72,
          "bf25": 2.26
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        "6M": {
          "atmIv": 38.35,
          "rr25": -1.38,
          "bf25": 2.34
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        "9M": {
          "atmIv": 38.83,
          "rr25": -1.13,
          "bf25": 2.39
        },
        "1Y": {
          "atmIv": 39.29,
          "rr25": -0.67,
          "bf25": 2.41
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    },
    {
      "date": "2026-10-13",
      "snapshotAt": "2026-10-13T23:59:00+00:00",
      "tenors": {
        "1W": {
          "atmIv": 33.54,
          "rr25": -4.65,
          "bf25": 1.99
        },
        "2W": {
          "atmIv": 33.86,
          "rr25": -5.29,
          "bf25": 1.99
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        "1M": {
          "atmIv": 35.98,
          "rr25": -3.4,
          "bf25": 2.18
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        "3M": {
          "atmIv": 37.63,
          "rr25": -2.11,
          "bf25": 2.41
        },
        "6M": {
          "atmIv": 38.49,
          "rr25": -1.53,
          "bf25": 2.49
        },
        "9M": {
          "atmIv": 39.05,
          "rr25": -1.16,
          "bf25": 2.46
        },
        "1Y": {
          "atmIv": 39.39,
          "rr25": -0.72,
          "bf25": 2.4
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      }
    },
    {
      "date": "2026-10-14",
      "snapshotAt": "2026-10-14T23:59:00+00:00",
      "tenors": {
        "1W": {
          "atmIv": 34.17,
          "rr25": -4.08,
          "bf25": 2.06
        },
        "2W": {
          "atmIv": 34.75,
          "rr25": -4.65,
          "bf25": 2.29
        },
        "1M": {
          "atmIv": 36.56,
          "rr25": -3.08,
          "bf25": 2.36
        },
        "3M": {
          "atmIv": 37.68,
          "rr25": -2.22,
          "bf25": 2.44
        },
        "6M": {
          "atmIv": 38.48,
          "rr25": -1.58,
          "bf25": 2.52
        },
        "9M": {
          "atmIv": 39.05,
          "rr25": -1.25,
          "bf25": 2.55
        },
        "1Y": {
          "atmIv": 39.43,
          "rr25": -0.79,
          "bf25": 2.49
        }
      }
    },
    {
      "date": "2026-10-15",
      "snapshotAt": "2026-10-15T23:59:00+00:00",
      "tenors": {
        "1W": {
          "atmIv": 33.48,
          "rr25": -3.41,
          "bf25": 1.85
        },
        "2W": {
          "atmIv": 34.29,
          "rr25": -4.34,
          "bf25": 2.14
        },
        "1M": {
          "atmIv": 36.63,
          "rr25": -3.04,
          "bf25": 2.24
        },
        "3M": {
          "atmIv": 37.28,
          "rr25": -2.32,
          "bf25": 2.44
        },
        "6M": {
          "atmIv": 38.24,
          "rr25": -1.67,
          "bf25": 2.45
        },
        "9M": {
          "atmIv": 39.02,
          "rr25": -1.34,
          "bf25": 2.42
        },
        "1Y": {
          "atmIv": 39.35,
          "rr25": -1.0,
          "bf25": 2.42
        }
      }
    },
    {
      "date": "2026-10-16",
      "snapshotAt": "2026-10-16T23:59:00+00:00",
      "tenors": {
        "1W": {
          "atmIv": 31.16,
          "rr25": -4.61,
          "bf25": 2.41
        },
        "2W": {
          "atmIv": 33.47,
          "rr25": -4.73,
          "bf25": 2.15
        },
        "1M": {
          "atmIv": 35.81,
          "rr25": -3.18,
          "bf25": 2.26
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        "3M": {
          "atmIv": 36.77,
          "rr25": -2.33,
          "bf25": 2.27
        },
        "6M": {
          "atmIv": 37.92,
          "rr25": -1.65,
          "bf25": 2.27
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        "9M": {
          "atmIv": 38.51,
          "rr25": -1.56,
          "bf25": 2.26
        },
        "1Y": {
          "atmIv": 38.95,
          "rr25": -1.33,
          "bf25": 2.15
        }
      }
    },
    {
      "date": "2026-10-17",
      "snapshotAt": "2026-10-17T16:31:00+00:00",
      "tenors": {
        "1W": {
          "atmIv": 31.36,
          "rr25": -4.46,
          "bf25": 2.0
        },
        "2W": {
          "atmIv": 33.49,
          "rr25": -4.2,
          "bf25": 2.04
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        "1M": {
          "atmIv": 35.76,
          "rr25": -3.12,
          "bf25": 2.14
        },
        "3M": {
          "atmIv": 36.67,
          "rr25": -2.28,
          "bf25": 2.22
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        "6M": {
          "atmIv": 37.69,
          "rr25": -1.62,
          "bf25": 2.22
        },
        "9M": {
          "atmIv": 38.22,
          "rr25": -1.41,
          "bf25": 2.25
        },
        "1Y": {
          "atmIv": 38.63,
          "rr25": -1.07,
          "bf25": 2.15
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    "observedDays": 8,
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      {
        "tenor": "1W",
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          "minimum": 31.16,
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        "tenor": "6M",
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          "minimum": 37.69,
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        "tenor": "9M",
        "atmIv": {
          "minimum": 38.22,
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        "tenor": "1Y",
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      {
        "metric": "atmIv",
        "tenor": "1W",
        "fromDate": "2026-10-15",
        "toDate": "2026-10-16",
        "change": -2.32,
        "score": 2.32
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      {
        "metric": "rr25",
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        "fromDate": "2026-10-12",
        "toDate": "2026-10-13",
        "change": -1.9,
        "score": 1.9
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      {
        "metric": "rr25",
        "tenor": "1W",
        "fromDate": "2026-10-12",
        "toDate": "2026-10-13",
        "change": -1.87,
        "score": 1.87
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      {
        "metric": "atmIv",
        "tenor": "1W",
        "fromDate": "2026-10-11",
        "toDate": "2026-10-12",
        "change": 1.65,
        "score": 1.65
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      {
        "metric": "rr25",
        "tenor": "1W",
        "fromDate": "2026-10-15",
        "toDate": "2026-10-16",
        "change": -1.2,
        "score": 1.2
      },
      {
        "metric": "atmIv",
        "tenor": "2W",
        "fromDate": "2026-10-11",
        "toDate": "2026-10-12",
        "change": 1.11,
        "score": 1.11
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      {
        "metric": "atmIv",
        "tenor": "2W",
        "fromDate": "2026-10-13",
        "toDate": "2026-10-14",
        "change": 0.89,
        "score": 0.89
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      {
        "metric": "rr25",
        "tenor": "1M",
        "fromDate": "2026-10-12",
        "toDate": "2026-10-13",
        "change": -0.84,
        "score": 0.84
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      {
        "metric": "atmIv",
        "tenor": "2W",
        "fromDate": "2026-10-15",
        "toDate": "2026-10-16",
        "change": -0.82,
        "score": 0.82
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      {
        "metric": "atmIv",
        "tenor": "1M",
        "fromDate": "2026-10-15",
        "toDate": "2026-10-16",
        "change": -0.82,
        "score": 0.82
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  },
  "dailyReportInputs": [
    {
      "reportDate": "2026-10-10",
      "href": "/reports/2026-10-10",
      "currentSnapshotAt": "2026-10-10T17:02:00+00:00",
      "headline": "Bitcoin options: 1w RR25 drops 1.03 volatility points, widening put premium",
      "readerSummary": "1W RR25 moved 1.03 volatility points toward puts to -2.99%, leaving puts richer than calls; this was a routine move at the 64th percentile among 168 comparable historical observations. At the cutoff, realised volatility measured 14.51% over 24 hours, 29.73% over seven days and 34.32% over 30 days. Front-end ATM IV averaged 32.45%, -0.12 points from the prior snapshot, while the long end averaged 38.00%, -0.02 points. 1W ATM IV fell 0.87 volatility points to 30.30%. 2W BF25 rose 0.10 volatility points to 1.69%. 24-hour spot-index: +0.35%; nearest eligible forward 13OCT26: +0.27% to $82,965.56. Relevant context found; no confirmed catalyst; the strongest assessed relationship has low causal confidence.",
      "readerSummarySource": "marketRead",
      "newsOutcome": "Relevant context found; no confirmed catalyst",
      "largestAtmMove": {
        "tenor": "1W",
        "change": -0.87,
        "current": 30.3
      }
    },
    {
      "reportDate": "2026-10-11",
      "href": "/reports/2026-10-11",
      "currentSnapshotAt": "2026-10-11T16:30:00+00:00",
      "headline": "Bitcoin options: 1w ATM IV rises 1.73 volatility points, leading the curve higher",
      "readerSummary": "1W ATM IV rose 1.73 volatility points to 32.48%, a routine move at the 52nd percentile among 169 comparable historical observations. At the cutoff, realised volatility measured 13.73% over 24 hours, 29.79% over seven days and 33.32% over 30 days. Front-end ATM IV averaged 33.70%, +1.10 points from the prior snapshot, while the long end averaged 38.11%, +0.10 points. 1W RR25 moved 0.46 volatility points toward puts to -3.48%, leaving puts richer than calls. 1W BF25 rose 0.16 volatility points to 1.86%. 24-hour spot-index: +1.09%; nearest eligible forward 14OCT26: +1.08% to $83,862.51. Relevant context found; no confirmed catalyst; the strongest assessed relationship has low causal confidence.",
      "readerSummarySource": "marketRead",
      "newsOutcome": "Relevant context found; no confirmed catalyst",
      "largestAtmMove": {
        "tenor": "1W",
        "change": 1.73,
        "current": 32.48
      }
    },
    {
      "reportDate": "2026-10-12",
      "href": "/reports/2026-10-12",
      "currentSnapshotAt": "2026-10-12T16:30:00+00:00",
      "headline": "Bitcoin options: wings move closer to ATM as Bitcoin's 1w BF25 drops 0.29 volatility points",
      "readerSummary": "1W RR25 moved 0.71 volatility points toward calls to -2.77%, leaving puts richer than calls; this was a routine move at the 47th percentile among 170 comparable historical observations. At the cutoff, realised volatility measured 27.65% over 24 hours, 28.40% over seven days and 33.48% over 30 days. Front-end ATM IV averaged 33.74%, +0.04 points from the prior snapshot, while the long end averaged 38.19%, +0.08 points. 1W ATM IV fell 0.25 volatility points to 32.23%. 1W BF25 fell 0.29 volatility points to 1.57%. 24-hour spot-index: -1.32%; nearest eligible forward 15OCT26: -1.29% to $82,785.64. Relevant context found; no confirmed catalyst; the strongest assessed relationship has low causal confidence.",
      "readerSummarySource": "marketRead",
      "newsOutcome": "Relevant context found; no confirmed catalyst",
      "largestAtmMove": {
        "tenor": "1W",
        "change": -0.25,
        "current": 32.23
      }
    },
    {
      "reportDate": "2026-10-13",
      "href": "/reports/2026-10-13",
      "currentSnapshotAt": "2026-10-13T16:30:00+00:00",
      "headline": "Bitcoin options: 16oct26 smile rotation falls 5.00 volatility points",
      "readerSummary": "2W ATM IV fell 0.68 volatility points to 32.63%, a routine move at the 26th percentile among 23 comparable historical observations. At the cutoff, realised volatility measured 37.51% over 24 hours, 30.03% over seven days and 34.06% over 30 days. Front-end ATM IV averaged 33.31%, -0.43 points from the prior snapshot, while the long end averaged 38.31%, +0.12 points. 2W RR25 moved 0.40 volatility points toward puts to -3.88%, leaving puts richer than calls. 1M BF25 rose 0.17 volatility points to 2.09%. 24-hour spot-index: +0.83%; nearest eligible forward 16OCT26: +0.86% to $83,514.92. Relevant context found; no confirmed catalyst; the strongest assessed relationship has low causal confidence.",
      "readerSummarySource": "marketRead",
      "newsOutcome": "Relevant context found; no confirmed catalyst",
      "largestAtmMove": {
        "tenor": "2W",
        "change": -0.68,
        "current": 32.63
      }
    },
    {
      "reportDate": "2026-10-14",
      "href": "/reports/2026-10-14",
      "currentSnapshotAt": "2026-10-14T16:30:00+00:00",
      "headline": "Bitcoin options: wings gain relative to ATM as 2w BF25 increases 0.55 volatility points",
      "readerSummary": "1W ATM IV rose 2.19 volatility points to 34.11%, a routine move at the 61st percentile among 23 comparable historical observations. At the cutoff, realised volatility measured 38.06% over 24 hours, 30.99% over seven days and 34.18% over 30 days. Front-end ATM IV averaged 34.96%, +1.65 points from the prior snapshot, while the long end averaged 38.39%, +0.08 points. 1W RR25 moved 1.18 volatility points toward puts to -4.26%, leaving puts richer than calls. 2W BF25 rose 0.55 volatility points to 2.27%. 24-hour spot-index: -2.16%; nearest eligible forward 17OCT26: -2.17% to $81,694.70. Relevant context found; no confirmed catalyst; the strongest assessed relationship has low causal confidence.",
      "readerSummarySource": "marketRead",
      "newsOutcome": "Relevant context found; no confirmed catalyst",
      "largestAtmMove": {
        "tenor": "1W",
        "change": 2.19,
        "current": 34.11
      }
    },
    {
      "reportDate": "2026-10-15",
      "href": "/reports/2026-10-15",
      "currentSnapshotAt": "2026-10-15T16:31:00+00:00",
      "headline": "Bitcoin options: 18oct26 smile rotation rises 6.89 volatility points",
      "readerSummary": "1W ATM IV fell 0.81 volatility points to 33.30%, a routine move at the 39th percentile among 23 comparable historical observations. At the cutoff, realised volatility measured 51.15% over 24 hours, 33.44% over seven days and 34.87% over 30 days. Front-end ATM IV averaged 34.90%, -0.05 points from the prior snapshot, while the long end averaged 38.43%, +0.04 points. 1W RR25 moved 0.81 volatility points toward calls to -3.45%, leaving puts richer than calls. 1W BF25 rose 0.27 volatility points to 2.17%. 24-hour spot-index: +0.52%; nearest eligible forward 18OCT26: +0.47% to $82,097.61. Relevant context found; no confirmed catalyst; the strongest assessed relationship has low causal confidence.",
      "readerSummarySource": "marketRead",
      "newsOutcome": "Relevant context found; no confirmed catalyst",
      "largestAtmMove": {
        "tenor": "1W",
        "change": -0.81,
        "current": 33.3
      }
    },
    {
      "reportDate": "2026-10-16",
      "href": "/reports/2026-10-16",
      "currentSnapshotAt": "2026-10-16T16:31:00+00:00",
      "headline": "Bitcoin options: 1w ATM IV drops 4.50 volatility points",
      "readerSummary": "1W ATM IV fell 4.50 volatility points to 28.80%, a notable move at the 83rd percentile among 23 comparable historical observations. At the cutoff, realised volatility measured 31.53% over 24 hours, 33.07% over seven days and 34.39% over 30 days. Front-end ATM IV averaged 31.93%, -2.97 points from the prior snapshot, while the long end averaged 37.75%, -0.68 points. 1W RR25 moved 0.80 volatility points toward calls to -2.65%, leaving puts richer than calls. 1W BF25 fell 0.44 volatility points to 1.73%. 24-hour spot-index: -0.50%; nearest eligible forward 19OCT26: -0.72% to $81,521.50. Relevant context found; no confirmed catalyst; the strongest assessed relationship has low causal confidence.",
      "readerSummarySource": "marketRead",
      "newsOutcome": "Relevant context found; no confirmed catalyst",
      "largestAtmMove": {
        "tenor": "1W",
        "change": -4.5,
        "current": 28.8
      }
    },
    {
      "reportDate": "2026-10-17",
      "href": "/reports/2026-10-17",
      "currentSnapshotAt": "2026-10-17T16:31:00+00:00",
      "headline": "BTC daily surface: 1W ATM IV rises 2.56 volatility points",
      "readerSummary": "1W ATM IV rose 2.56 volatility points to 31.36%, a routine move at the 74th percentile among 23 comparable historical observations. At the cutoff, realised volatility measured 26.31% over 24 hours, 34.07% over seven days and 33.68% over 30 days. Front-end ATM IV averaged 33.54%, +1.60 points from the prior snapshot, while the long end averaged 37.69%, -0.06 points. 1W RR25 moved 1.81 volatility points toward puts to -4.46%, leaving puts richer than calls. 1W BF25 rose 0.27 volatility points to 2.00%. 24-hour spot-index: -0.42%; nearest eligible forward 20OCT26: -0.34% to $81,259.07. No sufficiently relevant context identified; the strongest assessed relationship has low causal confidence.",
      "readerSummarySource": "marketRead",
      "newsOutcome": "No sufficiently relevant context identified",
      "largestAtmMove": {
        "tenor": "1W",
        "change": 2.56,
        "current": 31.36
      }
    }
  ],
  "dailyReportReview": {
    "reportsIncluded": 8,
    "coverage": {
      "basis": "UTC calendar dates intersecting the inclusive snapshot window",
      "windowStartAt": "2026-10-10T16:31:00+00:00",
      "windowEndAt": "2026-10-17T16:31:00+00:00",
      "windowCalendarDates": [
        "2026-10-10",
        "2026-10-11",
        "2026-10-12",
        "2026-10-13",
        "2026-10-14",
        "2026-10-15",
        "2026-10-16",
        "2026-10-17"
      ],
      "includedReportDates": [
        "2026-10-10",
        "2026-10-11",
        "2026-10-12",
        "2026-10-13",
        "2026-10-14",
        "2026-10-15",
        "2026-10-16",
        "2026-10-17"
      ],
      "missingDates": [],
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                      "current": 1.71,
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                  },
                  {
                    "tenor": "2W",
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                  },
                  {
                    "tenor": "1M",
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                      "current": 34.98,
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                      "current": -2.66,
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                      "change": -1.38
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                    "bf25": {
                      "current": 1.9,
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                      "change": -0.18
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                  },
                  {
                    "tenor": "3M",
                    "availability": "available",
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                      "change": 0.53
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                    },
                    "bf25": {
                      "current": 2.23,
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                      "change": 0.09
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                  },
                  {
                    "tenor": "6M",
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                      "change": 0.5
                    },
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                      "current": -1.3,
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                      "change": -0.75
                    },
                    "bf25": {
                      "current": 2.34,
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                      "change": 0.05
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                  },
                  {
                    "tenor": "9M",
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                      "change": 0.14
                    },
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                      "change": 0.07
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                  },
                  {
                    "tenor": "1Y",
                    "availability": "unavailable",
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                          "price": 82947.16,
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                }
              }
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          ],
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        },
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        },
        {
          "asset": "BTC",
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          "sourceRefs": [
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        },
        {
          "asset": "BTC",
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