{"schemaVersion":1,"asset":"SOL","reportDate":"2026-09-09","timestamps":{"currentSnapshotAt":"2026-09-09T16:30:00+00:00","previousSnapshotAt":"2026-09-08T16:30:00+00:00","generatedAt":"2026-09-09T16:32:47+00:00"},"comparison":{"status":"available","note":null},"provenance":{"reportArtifact":"published daily report","sourceReport":"SOL","sourceReportHref":"/reports/sol/2026-09-09","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":1789576200811,"availability":"available","unavailableReason":null,"atmIv":{"current":54.66,"previous":55.35,"change":-0.69,"percentChange":-1.25},"rr25":{"current":0.9,"previous":1.28,"change":-0.38,"percentChange":-29.69},"bf25":{"current":4.48,"previous":4.26,"change":0.22,"percentChange":5.16}},{"tenor":"2W","targetExpiry":1790181000811,"availability":"available","unavailableReason":null,"atmIv":{"current":52.93,"previous":53.72,"change":-0.79,"percentChange":-1.47},"rr25":{"current":1.86,"previous":1.64,"change":0.22,"percentChange":13.41},"bf25":{"current":4.1,"previous":4.04,"change":0.06,"percentChange":1.49}},{"tenor":"1M","targetExpiry":1791563400811,"availability":"available","unavailableReason":null,"atmIv":{"current":52.53,"previous":52.81,"change":-0.28,"percentChange":-0.53},"rr25":{"current":2.16,"previous":2.11,"change":0.05,"percentChange":2.37},"bf25":{"current":4.16,"previous":4.19,"change":-0.03,"percentChange":-0.72}},{"tenor":"3M","targetExpiry":1796833800811,"availability":"available","unavailableReason":null,"atmIv":{"current":51.7,"previous":51.79,"change":-0.09,"percentChange":-0.17},"rr25":{"current":3.22,"previous":2.84,"change":0.38,"percentChange":13.38},"bf25":{"current":5.14,"previous":4.76,"change":0.38,"percentChange":7.98}},{"tenor":"6M","targetExpiry":1804696200811,"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":1812558600811,"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":1820507400811,"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 10044 (99.6429% coverage); returns spanning missing minutes are excluded"}