{"schemaVersion":1,"asset":"SOL","reportDate":"2026-09-22","timestamps":{"currentSnapshotAt":"2026-09-22T18:18:00+00:00","previousSnapshotAt":"2026-09-21T18:37:00+00:00","generatedAt":"2026-09-22T18:19:31+00:00"},"comparison":{"status":"available","note":null},"provenance":{"reportArtifact":"published daily report","sourceReport":"SOL","sourceReportHref":"/reports/sol/2026-09-22","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","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":null},"tenors":[{"tenor":"1W","targetExpiry":1790705880270,"availability":"available","unavailableReason":null,"atmIv":{"current":63.82,"previous":62.59,"change":1.23,"percentChange":1.97},"rr25":{"current":3.83,"previous":3.52,"change":0.31,"percentChange":8.81},"bf25":{"current":4.31,"previous":5.1,"change":-0.79,"percentChange":-15.49}},{"tenor":"2W","targetExpiry":1791310680270,"availability":"available","unavailableReason":null,"atmIv":{"current":60.47,"previous":59.09,"change":1.38,"percentChange":2.34},"rr25":{"current":3.93,"previous":3.61,"change":0.32,"percentChange":8.86},"bf25":{"current":4.13,"previous":4.89,"change":-0.76,"percentChange":-15.54}},{"tenor":"1M","targetExpiry":1792693080270,"availability":"available","unavailableReason":null,"atmIv":{"current":58.3,"previous":57.65,"change":0.65,"percentChange":1.13},"rr25":{"current":4.25,"previous":3.85,"change":0.4,"percentChange":10.39},"bf25":{"current":4.01,"previous":4.33,"change":-0.32,"percentChange":-7.39}},{"tenor":"3M","targetExpiry":1797963480270,"availability":"available","unavailableReason":null,"atmIv":{"current":56.13,"previous":56.58,"change":-0.45,"percentChange":-0.8},"rr25":{"current":4.19,"previous":4.81,"change":-0.62,"percentChange":-12.89},"bf25":{"current":5.07,"previous":5.39,"change":-0.32,"percentChange":-5.94}},{"tenor":"6M","targetExpiry":1805825880270,"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}},{"tenor":"9M","targetExpiry":1813688280270,"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}},{"tenor":"1Y","targetExpiry":1821637080270,"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":null,"realisedVolatilityUnavailableReason":"Canonical SOL index coverage for 24h is incomplete: expected 1440 one-minute returns, found 1420 (98.6111% coverage); returns spanning missing minutes are excluded"}