{ "schemaVersion": 2, "reportDate": "2026-06-12", "generatedAt": "2026-07-25T18:42:36+00:00", "currentSnapshotAt": "2026-06-12T23:59:00+00:00", "previousSnapshotAt": "2026-06-11T23:59:00+00:00", "windowHours": 24.0, "currency": "BTC", "methodology": { "source": "Derivasys proprietary historical SVI surface database", "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 interpolated independently at 1W, 2W, 1M, 3M, 6M, 9M and 1Y; headline rankings prioritise 1W, 2W, 1M, 3M, 6M and 1Y.", "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 changes only and does not infer unsupported market drivers, spot moves, flows or forecasts." }, "fitQuality": { "currentObjective": 0.25404004, "previousObjective": 0.04457862, "currentLiveError": 212.49751456, "previousLiveError": 349.84717175 }, "coverage": { "currentListedExpiries": 12, "previousListedExpiries": 12, "comparedListedExpiries": 11, "addedExpiries": [ "16JUN26" ], "removedExpiries": [ "12JUN26" ], "fixedTenors": [ "1W", "2W", "1M", "3M", "6M", "9M", "1Y" ] }, "commentary": { "source": "deterministic", "model": null, "headline": "BTC daily surface: 2W ATM IV falls 4.23 volatility points", "executiveSummary": "Across the six headline tenors, ATM IV averaged -2.23 volatility points, RR25 +0.33 volatility points and BF25 -0.18 volatility points between the stored endpoints.", "takeaways": [ { "id": "front-atm", "label": "Front end", "text": "Front-end ATM IV decreased, averaging -3.58 volatility points across 1W, 2W and 1M." }, { "id": "back-atm", "label": "Long end", "text": "Long-dated ATM IV decreased, averaging -0.55 volatility points across 6M and 1Y." }, { "id": "rr25", "label": "Skew", "text": "RR25 moved towards calls, averaging +0.33 volatility points across the six headline tenors." }, { "id": "bf25", "label": "Convexity", "text": "BF25 decreased, averaging -0.18 volatility points across the six headline tenors." }, { "id": "largest-standard-tenor", "label": "Largest standard-tenor move", "text": "The largest standard-tenor ATM IV move was -4.23 volatility points at 2W.", "tenor": "2W", "value": -4.23 } ], "evidenceIds": [ "front-atm", "back-atm", "rr25", "bf25", "largest-standard-tenor" ] }, "newsEvidence": null, "facts": [ { "id": "front-atm", "label": "Front end", "text": "Front-end ATM IV decreased, averaging -3.58 volatility points across 1W, 2W and 1M." }, { "id": "back-atm", "label": "Long end", "text": "Long-dated ATM IV decreased, averaging -0.55 volatility points across 6M and 1Y." }, { "id": "rr25", "label": "Skew", "text": "RR25 moved towards calls, averaging +0.33 volatility points across the six headline tenors." }, { "id": "bf25", "label": "Convexity", "text": "BF25 decreased, averaging -0.18 volatility points across the six headline tenors." }, { "id": "largest-standard-tenor", "label": "Largest standard-tenor move", "text": "The largest standard-tenor ATM IV move was -4.23 volatility points at 2W.", "tenor": "2W", "value": -4.23 } ], "summaryMetrics": { "basis": "Average change across 1W, 2W, 1M, 3M, 6M and 1Y", "unit": "volatility points", "atmIvChange": -2.23, "rr25Change": 0.33, "bf25Change": -0.18 }, "tenors": [ { "tenor": "1W", "targetExpiry": 1781913541975, "availability": "available", "unavailableReason": null, "atmIv": { "current": 36.84, "previous": 40.82, "change": -3.98, "percentChange": -9.75 }, "rr25": { "current": -3.72, "previous": -3.73, "change": 0.01, "percentChange": 0.27 }, "bf25": { "current": 1.92, "previous": 2.23, "change": -0.31, "percentChange": -13.9 } }, { "tenor": "2W", "targetExpiry": 1782518341975, "availability": "available", "unavailableReason": null, "atmIv": { "current": 37.29, "previous": 41.52, "change": -4.23, "percentChange": -10.19 }, "rr25": { "current": -4.54, "previous": -5.0, "change": 0.46, "percentChange": 9.2 }, "bf25": { "current": 2.36, "previous": 2.62, "change": -0.26, "percentChange": -9.92 } }, { "tenor": "1M", "targetExpiry": 1783900741975, "availability": "available", "unavailableReason": null, "atmIv": { "current": 38.65, "previous": 41.18, "change": -2.53, "percentChange": -6.14 }, "rr25": { "current": -5.45, "previous": -5.82, "change": 0.37, "percentChange": 6.36 }, "bf25": { "current": 2.21, "previous": 2.34, "change": -0.13, "percentChange": -5.56 } }, { "tenor": "3M", "targetExpiry": 1789171141975, "availability": "available", "unavailableReason": null, "atmIv": { 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