{"schemaVersion":1,"asset":"ETH","reportDate":"2026-09-26","timestamps":{"currentSnapshotAt":"2026-09-26T18:31:00+00:00","previousSnapshotAt":"2026-09-25T18:31:00+00:00","generatedAt":"2026-09-26T18:32:43+00:00"},"comparison":{"status":"available","note":null},"provenance":{"reportArtifact":"published daily report","sourceReport":"ETH","sourceReportHref":"/reports/eth/2026-09-26","source":"Derivasys proprietary historical SVI surface and canonical ETH 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 ETH-USD index log returns using a 365-day basis; all windows end at the current snapshot."},"tenors":[{"tenor":"1W","targetExpiry":1791052260302,"availability":"available","unavailableReason":null,"atmIv":{"current":40.91,"previous":39.25,"change":1.66,"percentChange":4.23},"rr25":{"current":-1.33,"previous":-1.82,"change":0.49,"percentChange":26.92},"bf25":{"current":2.41,"previous":2.3,"change":0.11,"percentChange":4.78}},{"tenor":"2W","targetExpiry":1791657060302,"availability":"available","unavailableReason":null,"atmIv":{"current":43.82,"previous":42.6,"change":1.22,"percentChange":2.86},"rr25":{"current":-1.05,"previous":-1.4,"change":0.35,"percentChange":25},"bf25":{"current":2.45,"previous":2.4,"change":0.05,"percentChange":2.08}},{"tenor":"1M","targetExpiry":1793039460302,"availability":"available","unavailableReason":null,"atmIv":{"current":47.05,"previous":46.98,"change":0.07,"percentChange":0.15},"rr25":{"current":-0.45,"previous":-0.68,"change":0.23,"percentChange":33.82},"bf25":{"current":2.33,"previous":2.26,"change":0.07,"percentChange":3.1}},{"tenor":"3M","targetExpiry":1798309860302,"availability":"available","unavailableReason":null,"atmIv":{"current":51.66,"previous":51.76,"change":-0.1,"percentChange":-0.19},"rr25":{"current":-0.08,"previous":0.38,"change":-0.46,"percentChange":-121.05},"bf25":{"current":2.98,"previous":3.02,"change":-0.04,"percentChange":-1.32}},{"tenor":"6M","targetExpiry":1806172260302,"availability":"available","unavailableReason":null,"atmIv":{"current":53.71,"previous":53.88,"change":-0.17,"percentChange":-0.32},"rr25":{"current":0.51,"previous":0.63,"change":-0.12,"percentChange":-19.05},"bf25":{"current":2.93,"previous":3.07,"change":-0.14,"percentChange":-4.56}},{"tenor":"9M","targetExpiry":1814034660302,"availability":"available","unavailableReason":null,"atmIv":{"current":54.67,"previous":54.73,"change":-0.06,"percentChange":-0.11},"rr25":{"current":1.43,"previous":1.45,"change":-0.02,"percentChange":-1.38},"bf25":{"current":2.85,"previous":2.79,"change":0.06,"percentChange":2.15}},{"tenor":"1Y","targetExpiry":1821983460302,"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/ETH-USD-INDEX (DERIBIT and OKX indexes)","fallbackObservations":72,"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":"2026-09-26T18:31:00+00:00","spotWindowStart":"2026-09-25T18:31:00+00:00","spotMetric":"spot-index return","spotUnit":"percent","spotMove24hPercent":-0.21,"rv24hPercent":20.41,"rv7dPercent":null,"rv30dPercent":null,"observations":{"24h":1440,"7d":10010,"30d":43130},"coverage":{"24h":{"status":"complete","observedReturns":1440,"expectedReturns":1440,"coveragePercent":100,"missingPriceMinutes":0,"missingIntervals":0,"largestMissingRunMinutes":0,"unavailableReason":null},"7d":{"status":"unavailable","observedReturns":10010,"expectedReturns":10080,"coveragePercent":99.3056,"missingPriceMinutes":68,"missingIntervals":2,"largestMissingRunMinutes":67,"unavailableReason":"7d RV requires at least 99.5% valid one-minute returns and no price gap over 60 minutes; coverage is 99.3056% with 68 missing price minutes across 2 intervals and a largest gap of 67 minutes."},"30d":{"status":"unavailable","observedReturns":43130,"expectedReturns":43200,"coveragePercent":99.838,"missingPriceMinutes":68,"missingIntervals":2,"largestMissingRunMinutes":67,"unavailableReason":"30d RV requires at least 99.5% valid one-minute returns and no price gap over 60 minutes; coverage is 99.8380% with 68 missing price minutes across 2 intervals and a largest gap of 67 minutes."}},"coveragePolicy":{"version":"observed-minute-returns-v1","minimumCoveragePercent":99.5,"minimumCoveragePercentByWindow":{"24h":99.5,"7d":99.5,"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":40.91,"oneWeekIvMinus7dRvPoints":null,"oneWeekIvMinus24hRvPoints":20.5,"oneWeekIvMinus30dRvPoints":null,"oneWeekIvTo7dRvRatio":null,"spreadPercentile":null},"realisedVolatilityUnavailableReason":null}