Daily SOL options market report · 24-hour comparison
Solana options reprice convexity lower as call skew persists
Solana’s standout move was a sharp reduction in one-month BF25, indicating lower priced convexity away from the centre of the options surface. That reset sat alongside a strongly positive two-week RR25, where call-side volatility remained richer than put-side volatility.
Solana one-month BF25 fell 1.03 volatility points to 3.69%, a large convexity repricing at the 95.2 percentile of comparable history. Separately, Solana two-week RR25 rose 2.05 volatility points to 5.09%, leaving calls materially richer than puts. One-month ATM IV fell 2.13 volatility points to 52.69%, according to Derivasys data; realised-volatility comparisons were unavailable.
Solana block-speed report offers market context
CoinDesk reported that Solana sped up blocks while transaction capacity remained unchanged.
Macro
No qualifying macro event was retained.
Crypto
CoinDesk reported faster Solana blocks while transaction capacity remained unchanged.
Links identify the underlying reporting. Events are presented as context, not assigned causes.
02 · Options market read
What the volatility surface did.
4 of 6 headline tenors were comparable at both endpoints. The largest ATM IV move was 1M at -2.13 volatility points, to 52.69%.
Derived directly from structured Derivasys surface data
03 · Catalyst check
17 Sept 2026, 16:30 UTC to 18 Sept 2026, 16:30 UTC
Relevant context found; no confirmed catalyst
Relevant market event
1 event was retained after relevance scoring and event-level deduplication.
Confidencelow causal confidence
News is presented as contextual association unless the structured evidence supports a stronger relationship.
04 · Detailed analysis
What changed across the SOL volatility surface.
Front end
Front-end ATM IV decreased, averaging -0.47 volatility points to 51.78% across 1W, 2W and 1M.
Long end
Long-dated ATM IV is unavailable because comparable observations were not present at both snapshots.
Skew
RR25 moved towards calls, averaging +0.60 volatility points to 3.91% across the four available headline tenors.
Convexity
BF25 decreased, averaging -0.52 volatility points to 4.12% across the four available headline tenors.
Largest standard-tenor move
The largest standard-tenor ATM IV move was -2.13 volatility points at 1M, to 52.69%.
Universe roll: added 20SEP26; removed 18SEP26. Comparisons use common expiries only.
05 · Standard-tenor ranking
Largest surface events
01
Largest eligible smile rotation
2OCT26, +4.05 vol pts02
Largest standard-tenor ATM IV move
1M, -2.13 vol pts03
Largest standard-tenor RR25 move
2W, +2.05 vol pts04
Largest standard-tenor BF25 move
1M, -1.03 vol pts05
Largest eligible SVI sigma move
25DEC26, -0.1533 param06
Largest eligible SVI rho move
2OCT26, -0.1411 param
06 · ATM volatility
Standard-tenor ATM implied volatility.
Tenor
Current (vol %)
Previous (vol %)
Change (vol pts)
Relative change
1W
50.69
49.90
+0.79 vol pts
+1.58%
2W
51.97
52.04
-0.07 vol pts
-0.13%
1M
52.69
54.82
-2.13 vol pts
-3.89%
3M
54.03
55.77
-1.74 vol pts
-3.12%
6M
Unavailable
Unavailable
Unavailable
Unavailable
9M
Unavailable
Unavailable
Unavailable
Unavailable
1Y
Unavailable
Unavailable
Unavailable
Unavailable
07 · Risk reversals
RR25 skew moved most at 2W.
RR25 moved towards calls, averaging +0.60 volatility points to 3.91% across the four available headline tenors. Negative RR25 denotes a richer 25-delta put wing under the call-minus-put convention.
CurrentPrevious day
Tenor
Current (vol %)
Previous (vol %)
Change (vol pts)
1W
4.01
3.98
+0.03 vol pts
2W
5.09
3.04
+2.05 vol pts
1M
3.13
3.32
-0.19 vol pts
3M
3.40
2.89
+0.51 vol pts
6M
Unavailable
Unavailable
Unavailable
9M
Unavailable
Unavailable
Unavailable
1Y
Unavailable
Unavailable
Unavailable
08 · Butterflies
BF25 convexity changed most at 1M.
BF25 decreased, averaging -0.52 volatility points to 4.12% across the four available headline tenors. BF25 measures the average 25-delta wing premium over ATM IV.
CurrentPrevious day
Tenor
Current (vol %)
Previous (vol %)
Change (vol pts)
1W
3.81
4.42
-0.61 vol pts
2W
3.71
4.36
-0.65 vol pts
1M
3.69
4.72
-1.03 vol pts
3M
5.28
5.07
+0.21 vol pts
6M
Unavailable
Unavailable
Unavailable
9M
Unavailable
Unavailable
Unavailable
1Y
Unavailable
Unavailable
Unavailable
09 · Expiry effects
Near-settlement moves, shown with context.
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
19SEP26, +19.46 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.
CurrentPrevious day
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
19SEP26Expiry effect
0.6 days
111.73
+10.59 USD
60.69%
+7.95 vol pts
+3.22 vol pts
-2.96 vol pts
25SEP26
6.6 days
111.7
+10.49 USD
50.55%
+0.73 vol pts
-0.18 vol pts
-0.58 vol pts
2OCT26
13.6 days
111.79
+10.55 USD
51.93%
-0.22 vol pts
+2.19 vol pts
-0.65 vol pts
30OCT26
41.6 days
112.04
+10.61 USD
52.86%
-2.69 vol pts
-0.74 vol pts
-1.12 vol pts
25DEC26
97.6 days
112.38
+10.57 USD
54.10%
-1.68 vol pts
+0.58 vol pts
+0.26 vol pts
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.
19SEP26rotation towards calls · wing flattening25SEP26rotation towards calls2OCT26rotation towards calls · wing flattening30OCT26parallel shift lower25DEC26parallel 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
19SEP26
25SEP26
2OCT26
30OCT26
25DEC26
-0.30kATM+0.30k
12 · Technical appendix
Model parameters and normalized Greeks.
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
19SEP26
+0.02890
-0.08580
+0.12170
+0.02100
-0.03030
rotation towards calls, wing flattening
25SEP26
-0.00780
-0.00380
+0.00290
-0.00930
+0.05740
rotation towards calls
2OCT26
-0.01310
+0.01160
-0.14110
-0.10690
+0.05260
rotation towards calls, wing flattening
30OCT26
-0.02250
-0.00430
+0.00090
-0.01690
+0.10880
parallel shift lower
25DEC26
+0.05360
-0.03890
-0.01390
-0.01560
-0.15330
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.
SOL 30-day implied volatility was 3.3 times VIX, while its 30-session return correlation with SPX was mixed at 0.41.
Implied-volatility premium
SOL 30-day ATM IV was 51.60%, against VIX at 15.44: a 36.16-point spread and 3.34× ratio.
Realised-volatility regime
SOL 20-calendar-day realised volatility was 48.33%, versus SPX 20-session realised volatility of 9.85%. The spread ranked at 25.7 percentile of 230 prior observations.
Equity co-movement
Return correlation with SPX was 0.412 over 30 aligned sessions and 0.299 over 60 sessions. VIX9D, VIX and VIX3M closed at 13.39, 15.44 and 18.55.
As of 17 Sept 2026, 20:00 UTC. Persisted Derivasys market context; crypto RV uses sqrt(365), SPX RV uses sqrt(252).
13 · Methodology and provenance
Generated from measured Derivasys surface data.
Current snapshot
18 Sept 2026, 16:30 UTC
Comparison snapshot
17 Sept 2026, 16:30 UTC
Source
Derivasys proprietary historical SVI surface database
Comparison window
Nearest successful surface snapshots approximately 24 hours apart
RR convention
25-delta call IV minus 25-delta put IV
BF convention
Average 25-delta wing IV minus ATM forward IV
Fixed tenors
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.
