{"schemaVersion":1,"asset":"SOL","reportDate":"2026-09-20","timestamps":{"currentSnapshotAt":"2026-09-20T16:30:00+00:00","previousSnapshotAt":"2026-09-19T16:30:00+00:00","generatedAt":"2026-09-20T16:31:45+00:00"},"comparison":{"status":"available","note":null},"provenance":{"reportArtifact":"published daily report","sourceReport":"SOL","sourceReportHref":"/reports/sol/2026-09-20","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":1790526601191,"availability":"available","unavailableReason":null,"atmIv":{"current":55.38,"previous":53.38,"change":2,"percentChange":3.75},"rr25":{"current":1.04,"previous":1.79,"change":-0.75,"percentChange":-41.9},"bf25":{"current":4.36,"previous":3.97,"change":0.39,"percentChange":9.82}},{"tenor":"2W","targetExpiry":1791131401191,"availability":"available","unavailableReason":null,"atmIv":{"current":53.86,"previous":52.55,"change":1.31,"percentChange":2.49},"rr25":{"current":1.33,"previous":1.9,"change":-0.57,"percentChange":-30},"bf25":{"current":4.07,"previous":4.06,"change":0.01,"percentChange":0.25}},{"tenor":"1M","targetExpiry":1792513801191,"availability":"available","unavailableReason":null,"atmIv":{"current":53.39,"previous":52.92,"change":0.47,"percentChange":0.89},"rr25":{"current":2.01,"previous":2.53,"change":-0.52,"percentChange":-20.55},"bf25":{"current":4.37,"previous":4.03,"change":0.34,"percentChange":8.44}},{"tenor":"3M","targetExpiry":1797784201191,"availability":"available","unavailableReason":null,"atmIv":{"current":54.41,"previous":54.1,"change":0.31,"percentChange":0.57},"rr25":{"current":2.9,"previous":2.86,"change":0.04,"percentChange":1.4},"bf25":{"current":5.36,"previous":4.48,"change":0.88,"percentChange":19.64}},{"tenor":"6M","targetExpiry":1805646601191,"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":1813509001191,"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":1821457801191,"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 7d is incomplete: expected 10080 one-minute returns, found 10042 (99.6230% coverage); returns spanning missing minutes are excluded"}