Prior comparison unavailable: the published 2026-09-18 edition is verified but ends at 18 Sept, 16:30 UTC; this window requires 18 Sept, 16:59 UTC.
A structured watchlist was not recorded or could not be verified in the prior edition; prior-watch outcomes remain unavailable.
Next daily cutoff: measurable checks
These checks are reconstructed from this edition’s stored endpoints; they were not recorded in the original report.
Hold the observed level: SOL 1W ATM IV ≥ 53.62 percent at . Current level 53.62; threshold is the current observed endpoint.
Full retrace: SOL 1W ATM IV ≤ 50.90 percent at . Current level 53.62; threshold is the previous observed endpoint.
Measurement basis and receipt
These are observed-level conditions for the next aligned cutoff, with no forecast or trade action. Spot uses exact index endpoints where available; ATM IV is quoted in percent and its change, RR25 and BF25 in volatility points. Derived from verified legacy artifact endpoints.
RR25 is unavailable because comparable observations were not present at both snapshots. Negative RR25 denotes a richer 25-delta put wing under the call-minus-put convention.
Contracts with fewer than 2 full days to expiry remain in the tables but are excluded from headline rankings. Settlement proximity, time decay, changing liquidity and fewer quotes can exaggerate their changes.
0.6d
Smile rotation
20SEP26, +22.41 vol pts
10 · Volatility term structure
Today against the previous 24-hour snapshot.
Only fixed tenors bracketed by listed expiries at both snapshots are charted. The listed-expiry table preserves the observable exchange maturities underneath those interpolated points.
CurrentComparison snapshot
Suppressed outside the observable listed-expiry range: 6M, 9M, 1Y.
Expiry
Time left
Forward now (USD)
Forward change (USD)
ATM IV now
ATM IV change
RR25 change
BF25 change
20SEP26Expiry effect
0.6 days
111.94
+0.31 USD
47.22%
-2.38 vol pts
+1.90 vol pts
Unavailable
25SEP26
5.6 days
111.96
+0.36 USD
54.28%
+3.41 vol pts
-1.59 vol pts
Unavailable
2OCT26
12.6 days
111.99
+0.38 USD
52.39%
+1.20 vol pts
-2.18 vol pts
Unavailable
30OCT26
40.6 days
112.28
+0.40 USD
53.09%
+0.43 vol pts
+0.97 vol pts
Unavailable
25DEC26
96.6 days
112.61
+0.32 USD
54.23%
-0.02 vol pts
+0.01 vol pts
Unavailable
11 · Smile movement
Reconstructed SVI smiles for every common expiry.
Each overlay uses the stored five-parameter SVI fit and the snapshot-specific time to expiry. Ultra-short expiries are displayed but do not determine the headline ranking.
20SEP26rotation towards calls · wing steepening25SEP26parallel shift higher · rotation towards puts2OCT26rotation towards puts · wing steepening30OCT26rotation towards calls25DEC26parallel shift lower
Surface movement heatmap
Each cell is the fitted IV change in volatility points. Rows are listed expiries; columns run from the put wing through ATM to the call wing.
IV lowerIV higher
20SEP26
25SEP26
2OCT26
30OCT26
25DEC26
-0.30kATM+0.30k
Completed-session cross-asset context
Crypto volatility against US equity risk.
SOL 30-day implied volatility was 3.7 times VIX, while its 30-session return correlation with SPX was mixed at 0.39.
Implied-volatility premium
SOL 30-day ATM IV was 54.70%, against VIX at 14.81: a 39.89-point spread and 3.69× ratio.
Daily-close realised-volatility regime
SOL reported crypto realised volatility was 70.89%, versus SPX reported realised volatility of 9.38%.
Equity co-movement
Return correlation with SPX was 0.391 over 30 aligned sessions and 0.282 over 60 sessions. VIX9D, VIX and VIX3M closed at 12.27, 14.81 and 18.24.
RV comparison basis unverified: this edition does not record the recognised provider methodology for both horizons and annualisation conventions. Any historical spread rank should not be interpreted as establishing matched-horizon comparability.
As of 18 Sept 2026, 20:00 UTC. Implied volatility and completed-session realised volatility use their respective observation windows shown above.
Evidence and methodology
Crypto RV uses sqrt(365); SPX RV uses sqrt(252).
RV observation windows and sampling
The intraday RV comparison is unavailable. Recorded reason: Canonical SOL index coverage for 7d is incomplete: expected 10080 one-minute returns, found 10042 (99.6230% coverage); returns spanning missing minutes are excluded No coverage policy was recorded; its thresholds cannot be established from another report.
Evidence, source data and methodology
Report comparison baseline → current snapshot
2026-09-18 16:59:00 UTC → 2026-09-19 16:59:00 UTC
Changes use these stored market-snapshot baselines. The comparison baseline may differ from the snapshot used in the previous published edition.
Reader summary (BF-specific claims withheld)
Solana one-week ATM IV rose 2.72 volatility points to 53.62%, the largest standard-tenor volatility move in the surface. Solana two-week RR25 fell 2.00 volatility points to 2.64 volatility points, a relative rotation toward put volatility, although the positive reading still left calls richer than puts. Front-end ATM IV averaged 53.03% after a 1.52-point increase at the cutoff.
At report cutoff · Levels and stored endpoint changes
What matters now
Vol: SOL 1W ATM IV 53.62% · Δ +2.72 vol pts
Skew: SOL 1W RR25 3.02 vol pts · Δ -1.82 vol pts
Curve: SOL 3M minus 1W ATM IV spread +0.56 vol pts · spread Δ -2.71 vol pts
Vol
SOL 1W ATM IV 53.62% · Δ +2.72 vol ptspercentile rank 59.1% by absolute move · 30-day window (n=22)
Skew
SOL 1W RR25 3.02 vol pts · Δ -1.82 vol ptspercentile rank 45.5% by absolute move · 30-day window (n=22)
Wings
SOL Unavailable
IV versus RV
SOL Unavailable
Unavailable readings: SOL Wings; SOL IV versus RV. See the report’s data availability notes.
Δ compares the report’s stored surface endpoints. IV versus RV is a level comparison, not a daily change.
Historical move evidence
SOL 1W ATM IV: percentile rank 59.1% by absolute move · 30-day window (n=22)
SOL 1W RR25: percentile rank 45.5% by absolute move · 30-day window (n=22)
Technical appendix: measurement and history provenance
Original edition evidence follows unchanged. Its BF slots retain the original full fly25 or unverified basis; these receipts do not validate canonical BF25 history or ranks.
These diagnostics preserve the fitted-surface audit trail without competing with the main market story.
Show SVI parameter changes and normalized Greeks
SVI diagnostics
Daily movement in a, b, rho, m and sigma.
Among ranking-eligible expiries, the largest absolute rho change occurred at 2OCT26; the largest sigma change occurred at 25DEC26.
Expiry
Δ a
Δ b
Δ rho
Δ m
Δ sigma
Smile classification
20SEP26
+0.01100
-0.04180
+0.14000
+0.04480
+0.02330
rotation towards calls, wing steepening
25SEP26
-0.02980
+0.01730
+0.07460
+0.03330
+0.12500
parallel shift higher, rotation towards puts
2OCT26
-0.01230
+0.00110
+0.15150
+0.09160
+0.05330
rotation towards puts, wing steepening
30OCT26
+0.00020
+0.00580
-0.00020
-0.00830
-0.02030
rotation towards calls
25DEC26
-0.08710
+0.05480
+0.04670
+0.00900
+0.21970
parallel shift lower
Current surface characteristics
Where normalized model Greek intensity is highest.
These are comparable Black-forward Greeks for a one-SOL ATM-forward call at each listed expiry—not portfolio exposure, open interest or a prediction of dealer positioning.
Thresholds are asset-specific policies recorded in this edition. Each window is assessed independently; returns spanning gaps are excluded. Partial estimates may miss volatility during gaps.
RV coverage and methodology
SOL · Unavailable · Surface cutoff 19 Sept 2026, 16:59:00 UTC · 7D coverage not recorded / not recorded required · largest 7D gap not recorded / not recorded maximum · maximum gap not recorded. RV suppressed — valid 7D coverage was not recorded. Canonical SOL index coverage for 7d is incomplete: expected 10080 one-minute returns, found 10042 (99.6230% coverage); returns spanning missing minutes are excluded Full 7D coverage policy was not recorded.
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.
Smile reconstruction
Listed-expiry smiles are reconstructed from stored SVI total-variance parameters on a fixed log-moneyness grid.
Ultra-short expiries
Expiries with fewer than 2 full days remaining stay in detailed tables but are excluded from headline rankings. Settlement proximity, time decay, changing liquidity and fewer quotes can exaggerate their changes.
Greek normalization
Black forward Greeks for a normalized one-SOL ATM-forward call, zero rate, fitted SVI IV
Catalyst policy
Only sufficiently relevant, reliably sourced events are shown; otherwise no catalyst is assigned.
