Daily cross-asset options reports comparing BTC, ETH and SOL implied volatility, skew, convexity and realised volatility from the same Derivasys snapshots.
Solana (SOL) versus Bitcoin (BTC) 1W ATM IV daily-change dispersion measured 7.47 volatility points. Between the October 12 and October 13 cutoffs at 16:30 UTC, SOL 1W ATM IV rose 7.16 volatility points to 54.04%, while BTC 1W ATM IV fell 0.31 volatility points to 31.92%. Ether's 1W ATM IV rose 0.71 volatility points, placing its repricing between those endpoints.
Solana–Bitcoin 1W ATM IV level dispersion measured 14.65 volatility points at the October 12 cutoff: Solana 1W ATM IV was 46.88%, versus Bitcoin 1W ATM IV at 32.23%, according to Derivasys data. The cross-sectional range across Bitcoin, Ether and Solana was unusually tight within the supplied matching history. Unequal daily ATM IV declines accompanied that convergence, while one-week skew dispersion widened.
Major-coin 1W ATM IV daily-change dispersion measured 0.31 volatility points between Solana and Bitcoin, an unusually tight cross-sectional range. Solana's 1W ATM IV rose 2.04 volatility points, Bitcoin's rose 1.73 volatility points and Ether's rose 1.99 volatility points between the October 10 and October 11 cutoffs at 16:30 UTC. Volatility levels and call-minus-put skew remained separated across the three constituents.
Ether's 1W ATM implied volatility rose 1.46 volatility points, while Bitcoin's 1W ATM implied volatility fell 0.87 volatility points, defining a 2.33-volatility-point range of daily changes. Against the October 9 baseline at 17:02 UTC, the October 10 snapshot showed modest mixed daily options-surface adjustments across Ether, Bitcoin and Solana, with wider ATM IV level dispersion and narrower 1W skew dispersion.
Bitcoin, Ether and Solana all recorded lower 1W ATM implied volatility: the equal-weight daily 1W ATM IV change was -7.46 volatility points against the October 8 cutoff. Bitcoin's daily 1W ATM IV change was -5.34 volatility points, versus Solana's -8.58 volatility points. Ether's larger decline also helped narrow the cross-asset level range, while skew adjustments differed across constituents.
Bitcoin 1W RR25 fell 3.14 volatility points, Ether 1W RR25 fell 1.12 volatility points and Solana 1W RR25 fell 0.97 volatility points, a coordinated shift toward puts since the prior daily cutoff. The shared skew direction accompanied divergent increases in 1W ATM implied volatility and different 24-hour spot-index declines across the three constituents.
Major-coin 1W RR25 level dispersion reached 4.78 volatility points between Solana and Ether at the October 7 cutoff. Positive Solana skew and negative Ether skew defined the extremes, with Bitcoin between them. The widening cross-sectional range accompanied differing ATM implied-volatility adjustments, while reported Bitcoin ETF inflows and Ether ETF outflows supplied institutional context.
Ether and Bitcoin bracket the majors' 1W ATM implied-volatility-minus-seven-day realised-volatility spreads: Ether's one-week ATM implied volatility is 3.51 volatility points above seven-day realised volatility, while Bitcoin's one-week ATM implied volatility is 0.27 volatility points below seven-day realised volatility. The resulting cross-asset dispersion is 3.78 volatility points at the October 6 cutoff, with Solana between them. Daily options repricing diverged across the constituents, alongside derivatives-access and infrastructure news.
Ether (ETH) and Solana (SOL) defined the 1W IV minus 7D realised volatility dispersion of 4.17 volatility points at the October 5, 16:29 UTC cutoff. Ether had the highest spread and Solana the lowest when comparing one-week ATM implied volatility with seven-day realised volatility. Bitcoin stood between them, while daily changes compressed the outright 1W ATM IV range.
Ether and Solana show dispersion of 5.79 volatility points in 1W ATM implied volatility minus seven-day realised volatility, according to Derivasys data at the 4 October cutoff. Ether stands 2.58 volatility points above seven-day realised volatility, while Solana stands 3.21 volatility points below it. Bitcoin falls between these endpoints. The comparison measures implied volatility against recent realised volatility without establishing whether options are cheap or expensive.
Solana’s one-week ATM implied volatility exceeded Bitcoin’s by 24.37 volatility points, up from 23.54 points over October 2–3. Solana stood at 53.71%, versus Bitcoin at 29.34%. The comparison describes the options surface at the report cutoff; it does not establish a news catalyst or a forecast for the underlying price.
The Solana–Bitcoin one-week ATM implied-volatility gap widened 1.26 volatility points to 24.36 points over the day ending October 2 at 16:30 UTC. Bitcoin’s implied volatility declined faster than Solana’s.
Derivasys data at October 1, 16:30 UTC show the Solana–Bitcoin one-week ATM implied-volatility gap narrowing by 2.41 volatility points to 23.10 points, while the Solana–Ether skew gap widened.
At the September 30 cutoff, Derivasys data show Ether one-week ATM IV stood 1.22 volatility points above seven-day realised volatility, while Bitcoin's equivalent spread stood at -2.73 points and Solana's at -4.49 points. The Ether–Solana one-week implied-versus-realised range was 5.71 volatility points. This separates the majors on a common volatility comparison despite falling one-week ATM IV across all three; the spread readings are levels, without measured daily changes.
Ether one-week ATM IV fell 2.52 volatility points, compared with a 0.46-point decline in Solana one-week ATM IV, according to Derivasys data for the 24-hour window ending September 29. The difference between their daily changes was 2.06 volatility points. Bitcoin one-week ATM IV fell 1.32 points, placing its adjustment between those extremes. All three majors eased at this tenor, but Ether underwent the sharper repricing of volatility implied by options near the underlying price.
Derivasys data show Ether one-week at-the-money IV stood 1.48 volatility points above Ether seven-day realised volatility, while Solana one-week at-the-money IV stood 3.35 points below Solana seven-day realised volatility. The 4.83-point range between those implied-versus-realised readings was at the 79.2 percentile of available aligned history. This is a comparison of levels at the cutoff, not a measured daily widening. Bitcoin lay between the two, leaving the major-coin relative-value picture more differentiated than their common rise in one-week implied volatility suggests.
Derivasys data show one-week ATM implied volatility below seven-day realised volatility in Bitcoin, Ether and Solana at the cutoff. Solana had the largest shortfall, while Ether had the smallest, leaving a 3.32-volatility-point range in the implied-minus-realised comparison. This is a comparison of levels across the three assets, not a measured daily widening of that range. At-the-money implied volatility reflects options near each coin’s current price; realised volatility measures observed returns.
The one-week implied-volatility premium carried by Solana over Bitcoin narrowed between 25 September, 18:31 UTC and 26 September, 18:31 UTC. Derivasys data put the SOL–BTC one-week ATM IV gap at 23.19 volatility points, down 2.47 points from the prior cutoff, while Solana still had the highest one-week ATM IV among the three major coins. Ether led the daily increase in that metric and Solana declined, bringing their levels closer together. The cross-asset story is convergence in volatility pricing; separate skew readings show another narrowing gap.
Major-coin one-week RR25 dispersion narrowed 0.71 volatility points to 7.64 volatility points between SOL and ETH, yet remained elevated at the 96.3 percentile of the available history. SOL one-week RR25 was 6.39%, call-rich, while ETH one-week RR25 was -1.25%, put-rich. Ether’s 6.11-volatility-point decline in one-week ATM IV made it the clear volatility-reset outlier.
Major-coin one-week skew separated sharply at the cutoff: SOL one-week RR25 stood at 5.86%, while BTC one-week RR25 was -2.60%, creating an 8.46-volatility-point spread that widened 4.46 volatility points. The contrast indicates markedly richer SOL call-side volatility and richer BTC put-side volatility, rather than a uniform directional signal across major-coin options.
Major-coin one-week RR25 dispersion widened by 0.78 volatility points to 5.44 points between Solana and Bitcoin. Solana one-week RR25 stood at 3.55%, leaving call-side volatility richer than put-side volatility, while Bitcoin one-week RR25 stood at -1.89%, leaving put-side volatility richer. One-week ATM IV levels remained highest for Solana at 56.08% and lowest for Bitcoin at 34.13%, although the Solana-Bitcoin one-week ATM IV level spread narrowed 1.87 points to 21.95 points.
The major-coin one-week ATM IV gap between Solana and Bitcoin widened 4.09 volatility points to 27.32 volatility points over the observation window, reaching the 87.5 percentile of the available historical comparison set. ATM IV is the implied volatility of at-the-money options, a measure of the volatility priced into contracts near the prevailing price.
Derivasys data show Solana as the high end and Bitcoin as the low end of this one-week ATM IV comparison. One-week implied-versus-realised volatility data were unavailable for Bitcoin, Ether and Solana, and no qualifying news context was retained.
Major-coin one-week ATM IV dispersion widened by 1.09 volatility points to 24.35 points, with Solana at 63.31% and Bitcoin at 38.96% at the cutoff. Derivasys data show Solana also posted the largest one-week ATM IV increase, 5.85 volatility points, while Ether’s 2.65-point increase was smallest. The one-week RR25 gap widened as Solana became more call-rich relative to Bitcoin.
Major-coin one-week ATM IV dispersion widened 2.30 volatility points to 21.40 points at the cutoff, with Solana one-week ATM IV at 55.38% and Bitcoin one-week ATM IV at 33.98%. Solana also posted the largest one-week ATM IV change, rising 2.00 points, while Bitcoin and Ether one-week ATM IV each edged lower. The widening relative-volatility gap ranked at the 81.8 percentile of the available history.
