{"schemaVersion":1,"asset":"SOL","reportDate":"2026-09-19","timestamps":{"currentSnapshotAt":"2026-09-19T16:59:00+00:00","previousSnapshotAt":"2026-09-18T16:59:00+00:00","generatedAt":"2026-09-19T17:00:49+00:00"},"comparison":{"status":"available","note":null},"provenance":{"reportArtifact":"published daily report","sourceReport":"SOL","sourceReportHref":"/reports/sol/2026-09-19","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":1790441940534,"availability":"available","unavailableReason":null,"atmIv":{"current":53.62,"previous":50.9,"change":2.72,"percentChange":5.34},"rr25":{"current":3.02,"previous":4.84,"change":-1.82,"percentChange":-37.6},"bf25":{"current":4.06,"previous":4.24,"change":-0.18,"percentChange":-4.25}},{"tenor":"2W","targetExpiry":1791046740534,"availability":"available","unavailableReason":null,"atmIv":{"current":52.49,"previous":51.25,"change":1.24,"percentChange":2.42},"rr25":{"current":2.64,"previous":4.64,"change":-2,"percentChange":-43.1},"bf25":{"current":4.12,"previous":3.98,"change":0.14,"percentChange":3.52}},{"tenor":"1M","targetExpiry":1792429140534,"availability":"available","unavailableReason":null,"atmIv":{"current":52.98,"previous":52.39,"change":0.59,"percentChange":1.13},"rr25":{"current":2.96,"previous":2.56,"change":0.4,"percentChange":15.62},"bf25":{"current":4.04,"previous":3.8,"change":0.24,"percentChange":6.32}},{"tenor":"3M","targetExpiry":1797699540534,"availability":"available","unavailableReason":null,"atmIv":{"current":54.18,"previous":54.17,"change":0.01,"percentChange":0.02},"rr25":{"current":3.12,"previous":3.06,"change":0.06,"percentChange":1.96},"bf25":{"current":4.56,"previous":4.8,"change":-0.24,"percentChange":-5}},{"tenor":"6M","targetExpiry":1805561940534,"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":1813424340534,"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":1821373140534,"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"}