{"schemaVersion":1,"asset":"ETH","reportDate":"2026-09-27","timestamps":{"currentSnapshotAt":"2026-09-27T19:05:00+00:00","previousSnapshotAt":"2026-09-26T19:05:00+00:00","generatedAt":"2026-09-27T19:06:17+00:00"},"comparison":{"status":"available","note":null},"provenance":{"reportArtifact":"published daily report","sourceReport":"ETH","sourceReportHref":"/reports/eth/2026-09-27","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":1791140700415,"availability":"available","unavailableReason":null,"atmIv":{"current":43.69,"previous":41.68,"change":2.01,"percentChange":4.82},"rr25":{"current":-0.61,"previous":-1.1,"change":0.49,"percentChange":44.55},"bf25":{"current":2.73,"previous":2.46,"change":0.27,"percentChange":10.98}},{"tenor":"2W","targetExpiry":1791745500415,"availability":"available","unavailableReason":null,"atmIv":{"current":44.92,"previous":43.74,"change":1.18,"percentChange":2.7},"rr25":{"current":-0.31,"previous":-0.85,"change":0.54,"percentChange":63.53},"bf25":{"current":2.67,"previous":2.45,"change":0.22,"percentChange":8.98}},{"tenor":"1M","targetExpiry":1793127900415,"availability":"available","unavailableReason":null,"atmIv":{"current":47.63,"previous":46.96,"change":0.67,"percentChange":1.43},"rr25":{"current":-0.4,"previous":-0.44,"change":0.04,"percentChange":9.09},"bf25":{"current":2.42,"previous":2.36,"change":0.06,"percentChange":2.54}},{"tenor":"3M","targetExpiry":1798398300415,"availability":"available","unavailableReason":null,"atmIv":{"current":51.7,"previous":51.66,"change":0.04,"percentChange":0.08},"rr25":{"current":0.03,"previous":0.09,"change":-0.06,"percentChange":-66.67},"bf25":{"current":2.89,"previous":2.97,"change":-0.08,"percentChange":-2.69}},{"tenor":"6M","targetExpiry":1806260700415,"availability":"available","unavailableReason":null,"atmIv":{"current":53.76,"previous":53.78,"change":-0.02,"percentChange":-0.04},"rr25":{"current":0.35,"previous":0.59,"change":-0.24,"percentChange":-40.68},"bf25":{"current":2.91,"previous":2.93,"change":-0.02,"percentChange":-0.68}},{"tenor":"9M","targetExpiry":1814123100415,"availability":"available","unavailableReason":null,"atmIv":{"current":54.65,"previous":54.67,"change":-0.02,"percentChange":-0.04},"rr25":{"current":1.1,"previous":1.37,"change":-0.27,"percentChange":-19.71},"bf25":{"current":2.96,"previous":2.87,"change":0.09,"percentChange":3.14}},{"tenor":"1Y","targetExpiry":1822071900415,"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":"2026-09-27T19:05:00+00:00","spotWindowStart":"2026-09-26T19:05:00+00:00","spotMetric":"spot-index return","spotUnit":"percent","spotMove24hPercent":0.31,"rv24hPercent":25.19,"rv7dPercent":46.47,"rv30dPercent":46.81,"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":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":43.69,"oneWeekIvMinus7dRvPoints":-2.78,"oneWeekIvMinus24hRvPoints":18.5,"oneWeekIvMinus30dRvPoints":-3.12,"oneWeekIvTo7dRvRatio":null,"spreadPercentile":null},"realisedVolatilityUnavailableReason":null}