{"schemaVersion":1,"asset":"BTC","reportDate":"2026-10-04","timestamps":{"currentSnapshotAt":"2026-10-04T16:30:00+00:00","previousSnapshotAt":"2026-10-03T16:30:00+00:00","generatedAt":"2026-10-04T16:30:54+00:00"},"comparison":{"status":"available","note":null},"provenance":{"reportArtifact":"published daily report","sourceReport":"BTC","sourceReportHref":"/reports/2026-10-04","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","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.","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."},"tenors":[{"tenor":"1W","targetExpiry":1791736200038,"availability":"available","unavailableReason":null,"atmIv":{"current":31.9,"previous":29.03,"change":2.87,"percentChange":9.89},"rr25":{"current":0.79,"previous":-0.42,"change":1.21,"percentChange":288.1},"bf25":{"current":1.75,"previous":1.58,"change":0.17,"percentChange":10.76}},{"tenor":"2W","targetExpiry":1792341000038,"availability":"available","unavailableReason":null,"atmIv":{"current":32.4,"previous":30.61,"change":1.79,"percentChange":5.85},"rr25":{"current":0.84,"previous":-0.17,"change":1.01,"percentChange":594.12},"bf25":{"current":1.86,"previous":1.71,"change":0.15,"percentChange":8.77}},{"tenor":"1M","targetExpiry":1793723400038,"availability":"available","unavailableReason":null,"atmIv":{"current":33.99,"previous":33.41,"change":0.58,"percentChange":1.74},"rr25":{"current":-0.25,"previous":-1.13,"change":0.88,"percentChange":77.88},"bf25":{"current":2.25,"previous":2.07,"change":0.18,"percentChange":8.7}},{"tenor":"3M","targetExpiry":1798993800038,"availability":"available","unavailableReason":null,"atmIv":{"current":36.62,"previous":36.5,"change":0.12,"percentChange":0.33},"rr25":{"current":-0.77,"previous":-0.93,"change":0.16,"percentChange":17.2},"bf25":{"current":2.23,"previous":2.15,"change":0.08,"percentChange":3.72}},{"tenor":"6M","targetExpiry":1806856200038,"availability":"available","unavailableReason":null,"atmIv":{"current":37.5,"previous":37.4,"change":0.1,"percentChange":0.27},"rr25":{"current":-0.67,"previous":-0.57,"change":-0.1,"percentChange":-17.54},"bf25":{"current":2.29,"previous":2.33,"change":-0.04,"percentChange":-1.72}},{"tenor":"9M","targetExpiry":1814718600038,"availability":"available","unavailableReason":null,"atmIv":{"current":38.43,"previous":38.42,"change":0.01,"percentChange":0.03},"rr25":{"current":-0.26,"previous":-0.18,"change":-0.08,"percentChange":-44.44},"bf25":{"current":2.34,"previous":2.32,"change":0.02,"percentChange":0.86}},{"tenor":"1Y","targetExpiry":1822667400038,"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,"percentChange":null},"rr25":{"current":null,"previous":null,"change":null,"percentChange":null},"bf25":{"current":null,"previous":null,"change":null,"percentChange":null}}],"realisedVolatility":{"source":"canonical/BTC-USD-INDEX (DERIBIT and OKX indexes)","fallbackObservations":90,"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":"2026-10-04T16:30:00+00:00","spotWindowStart":"2026-10-03T16:30:00+00:00","spotMetric":"spot-index return","spotUnit":"percent","spotMove24hPercent":0.5,"rv24hPercent":12.81,"rv7dPercent":33.05,"rv30dPercent":33.61,"observations":{"24h":1440,"7d":10080,"30d":43200},"coverage":{"24h":{"status":"complete","observedReturns":1440,"expectedReturns":1440,"coveragePercent":100,"missingPriceMinutes":0,"missingIntervals":0,"largestMissingRunMinutes":0,"unavailableReason":null},"7d":{"status":"complete","observedReturns":10080,"expectedReturns":10080,"coveragePercent":100,"missingPriceMinutes":0,"missingIntervals":0,"largestMissingRunMinutes":0,"unavailableReason":null},"30d":{"status":"complete","observedReturns":43200,"expectedReturns":43200,"coveragePercent":100,"missingPriceMinutes":0,"missingIntervals":0,"largestMissingRunMinutes":0,"unavailableReason":null}},"coveragePolicy":{"version":"observed-minute-returns-v1","minimumCoveragePercent":null,"minimumCoveragePercentByWindow":{"24h":98,"7d":97,"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,"oneWeekAtmIvPercent":31.9,"oneWeekIvMinus7dRvPoints":-1.15,"oneWeekIvMinus24hRvPoints":19.09,"oneWeekIvMinus30dRvPoints":-1.71,"oneWeekIvTo7dRvRatio":null,"spreadPercentile":null},"realisedVolatilityUnavailableReason":null}