A permanent record of ATM volatility, skew, convexity and fitted-smile changes. BTC, ETH and SOL have individual daily coverage, with separate major-coin and altcoin comparisons; BTC also has a weekly edition.
Bitcoin one-week BF25 increased 0.25 volatility points to 2.12%, the day’s notable surface adjustment, while one-week ATM IV rose 0.90 points to 40.47%. The BF25 measure captures the relative richness of options away from the centre of the distribution. DerivaSys data showed front-end ATM IV averaging 39.36%, up 0.69 points; Bitcoin’s 24-hour spot-index return was 0.02%, and one-week implied volatility remained 7.40 points above seven-day realised volatility.
Ether one-month BF25 rose 0.50 volatility points to 3.22%, the material surface move, while one-week ATM IV climbed 2.12 points to 52.31%. BF25 measures the relative pricing of options away from the centre of the distribution. DerivaSys data put front-end ATM IV at 52.53%, up 1.74 points; Ether’s 24-hour spot-index return was 0.13%, and one-week implied volatility exceeded seven-day realised volatility by 9.23 points.
Solana’s 18SEP26 option smile rotated lower by 1.19 volatility points, the largest surface movement, while front-end ATM IV averaged 53.37%, down 0.59 points. The two-week ATM IV fell 0.79 points to 52.93%. DerivaSys data showed one-week RR25 moving 0.38 points toward puts to 0.90%, although calls remained relatively richer than puts. Realised-volatility comparisons were unavailable because the canonical minute series did not meet completeness requirements.
One-week ATM IV dispersion across Bitcoin, Ether and Solana narrowed 1.59 volatility points to 14.19 points, with Solana at 54.66% and Bitcoin at 40.47%. The convergence in levels obscured a divergent daily repricing: Ether’s one-week ATM IV rose 2.12 points while Solana’s fell 0.69 points. DerivaSys data therefore show less separation in prevailing volatility levels but a clear leader in the day’s volatility adjustment.
Altcoin options showed their clearest relative-value split in the one-week implied-versus-realised measure. TRX one-week ATM IV stood 7.72 volatility points above seven-day realised volatility, while XRP one-week ATM IV sat 7.74 points below its realised reading, leaving a 15.46-point range. DerivaSys data also showed XRP as the sole one-week volatility riser while HYPE posted the largest decline.
Bitcoin one-week RR25 rose 1.52 volatility points to 1.31%, leaving call-side volatility richer than put-side volatility after the 16:30 UTC cutoff. One-week ATM IV simultaneously rose 2.86 points to 39.57%, while Bitcoin spot fell 0.24% over 24 hours. DerivaSys data put one-week implied volatility 6.10 points above seven-day realised volatility.
Ether’s one-week ATM IV rose 2.35 volatility points to 50.19% over the observation window, lifting the cost of near-term options protection. Ether spot gained 0.78% over 24 hours, while Ether’s one-week ATM IV stood 6.27 volatility points above Ether’s seven-day realised volatility of 43.92%.
Ether’s one-month BF25 fell 0.19 volatility points to 2.72%. BF25 describes the curvature of the options smile, and the one-month Ether BF25 move was routine against the available historical sample. Derivasys data show that longer-dated Ether ATM IV changed little by comparison.
Solana one-week ATM IV increased 2.45 volatility points to 55.35% during the observation window, while one-week RR25 rose 1.16 points to 1.28%, making call-side volatility richer than put-side volatility. The nearest eligible forward gained 0.27%. Limited surface history and unavailable realised-volatility comparisons constrain broader interpretation.
Ether led Bitcoin by 1.02 percentage points in 24-hour spot performance over the observation window: Ether spot gained 0.78%, while Bitcoin spot declined 0.24%. Derivasys data show that the gap coincided with narrower one-week options-market dispersion across the major coins.
Solana’s one-week ATM implied volatility was 55.35%, versus Bitcoin’s one-week ATM implied volatility of 39.57%, leaving the one-week ATM implied-volatility gap 0.41 volatility points narrower at 15.78 volatility points. Ether’s one-week RR25 level was 1.66%, while Solana’s one-week RR25 level was 1.28%, narrowing the one-week RR25 gap by 0.66 volatility points to 0.38 volatility points. Implied volatility is the market’s expectation of future price variability: Ether’s one-week ATM implied volatility exceeded Ether’s seven-day realised volatility by 6.27 volatility points, while Bitcoin’s corresponding one-week implied-versus-seven-day-realised spread was 6.10 volatility points. Solana realised-volatility comparisons were unavailable.
TRX’s one-week ATM IV rose 3.39 volatility points to 21.98% over the observation window. Derivasys data show TRX’s one-week ATM IV minus seven-day realised volatility at 7.19 volatility points, versus XRP’s equivalent measure at negative 8.97 points; the cross-sectional range was 16.16 volatility points.
HYPE’s one-week ATM IV was 64.57%, compared with TRX’s one-week ATM IV of 21.98%. The one-week ATM IV level gap between HYPE and TRX narrowed 4.61 volatility points to 42.59 volatility points.
Bitcoin’s one-week RR25 fell 1.38 volatility points to -0.22%, making put-side volatility richer than call-side volatility. The move ranked at the 78.7 percentile among comparable observations. One-week ATM IV stood 2.49 volatility points above seven-day realised volatility, even as the front end eased modestly.
Ether’s three-month BF25 rose 0.25 volatility points to 3.27%, a notable move that lifted the convexity measure to its 91.3 percentile of available history. Front-end ATM IV averaged 49.28%, up 0.52 points, while one-week skew rotated toward puts but remained call-rich.
Ether led the split in major-coin options, with a 2.54-volatility-point dispersion in one-week ATM IV changes between Ether and Solana. Solana’s one-week ATM IV stood 16.86 volatility points above Bitcoin’s.
Altcoin options are separating alongside an 8.49-percentage-point gap in 24-hour spot performance between AVAX and HYPE. AVAX’s one-week ATM IV rose 2.32 volatility points while XRP’s fell 2.82 points, leaving a 5.14-point change range. HYPE nevertheless retained the highest one-week implied-volatility level, and TRX the lowest.
Bitcoin’s six-month BF25 rose 0.12 volatility points to 2.68%, the day’s notable surface adjustment. Meanwhile, one-week ATM IV increased 2.36 points to 36.83% and the front-end average reached 37.24%, while longer-dated ATM IV was broadly unchanged. The result is a firmer near-term volatility surface alongside modestly richer six-month convexity.
Ether’s short-dated options surface moved higher, with one-week ATM IV rising 4.63 volatility points to 46.95%. One-week RR25 increased 1.79 points to 2.55%, meaning calls carried higher implied volatility than puts. Front-end ATM IV averaged 49.13%, while the long end was effectively unchanged, concentrating the adjustment in nearer expiries.
Solana’s near-dated options surface moved higher, with one-week ATM IV gaining 3.08 volatility points to 54.69%. One-week RR25 rose 1.56 points to 3.19%, placing call-side volatility above put-side volatility. Front-end ATM IV averaged 53.81%, and the nearest eligible forward rose 2.44%, while realised-volatility comparisons were unavailable.
Ether led the major coins’ one-week ATM IV increase, rising 4.63 volatility points against Bitcoin’s 2.36-point gain and Solana’s 3.08-point rise. Yet Solana remained the highest-volatility major at 54.69%, compared with Bitcoin at 36.83%. The relative move widened repricing dispersion without changing the established level ranking.
One-week RR25 dispersion widened to 8.35 volatility points as XRP calls became relatively richer while TRX puts became relatively richer. The divide was accompanied by a 4.74-point range in one-week ATM IV changes, leaving AVAX higher and TRX lower, rather than signalling a uniform repricing across altcoins.
Bitcoin one-week ATM IV rose 3.24 volatility points to 34.95%, a notable move at the 82.8 percentile of comparable history. The front end lifted more than longer maturities, while one-week RR25 moved toward call-side volatility. Bitcoin one-week implied volatility nevertheless remained 1.59 points below seven-day realised volatility.
Ether’s nearest-expiry smile rotation was the largest surface dislocation, accompanied by a 2.83-point rise in Ether one-week RR25 to 1.36%. Ether one-week ATM IV rose 1.78 volatility points to 43.37%, remaining 3.46 volatility points below Ether seven-day realised volatility.
Solana’s nearest-expiry smile rotation led the daily options-surface changes. Solana one-week ATM IV rose 1.90 volatility points to 50.62%, while Solana one-week, two-week and one-month ATM IV averaged 51.17% after a 1.35-point increase. Solana two-week RR25 moved 1.58 volatility points toward call-side volatility to 2.60%.
One-week RR25 dispersion across Bitcoin, Ether and Solana narrowed 3.02 volatility points to 0.89 volatility points. Solana’s one-week RR25 was 2.25%, while Ether’s one-week RR25 was 1.36%. One-week ATM IV levels spanned 15.67 volatility points between Solana and Bitcoin.
Bitcoin two-week RR25 rose 3.22 volatility points to 1.61%, shifting from put-rich to call-rich pricing and registering as a notable historical move. Front-end ATM IV increased 1.92 points over the week, while long-dated ATM IV was broadly unchanged. The two-week ATM IV rise was 2.54 points to 36.73%.
Solana’s one-week ATM IV fell 20.89 volatility points, while Bitcoin’s one-week ATM IV rose 1.76 volatility points. Seven-market one-week ATM IV changes spanned 22.65 volatility points. HYPE’s one-week ATM IV was 62.25%.
Ether one-week ATM IV declined as one-week RR25 moved into put-rich territory. The move was concentrated at the front end, while long-dated ATM IV was broadly unchanged.
Solana one-week implied volatility remained below seven-day realised volatility. The front end softened and two-week skew moved toward puts while remaining call-rich.
One-week ATM IV dispersion across BTC, ETH and SOL widened by 2.54 volatility points to 16.95 points. SOL held the highest one-week implied volatility at 48.96%, BTC the lowest at 32.01%, and ETH’s 5.20-point decline was the largest absolute daily move.
Altcoin one-week volatility pricing diverged, led by XRP’s compression while TRX remained richest relative to realised volatility. Relative value, rather than a uniform complex repricing, defined the session.
Bitcoin two-week RR25 rose 2.89 volatility points to 1.99%, moving call-side volatility above put-side volatility in a large 96.2 percentile move. The adjustment coincided with a 5.75-point rise in one-week ATM IV, while the 1Y-minus-1W ATM slope became less steep.
Ether one-week ATM IV increased 4.73 volatility points to 47.71%, a notable move at the 81.2 percentile. Ether front-end ATM IV across the one-week, two-week and one-month tenors rose 2.76 volatility points on average, while Ether long-end ATM IV across the six-month and one-year tenors rose 0.26 volatility points on average. The Ether one-year-minus-one-week ATM IV slope was 8.15 volatility points.
Solana two-week RR25 jumped 3.88 volatility points to 3.97%, an exceptional 100th percentile move that left call-side volatility richer than put-side volatility. Meanwhile, front-end ATM IV declined 1.19 points on average and one-week ATM IV fell 1.67 points to 51.89%.
Major-coin one-week implied volatility minus seven-day realised volatility spans 13.91 volatility points between ETH and SOL. Major-coin one-week ATM IV level dispersion narrowed by 7.42 volatility points to 14.87 volatility points between SOL and BTC.
AVAX screens richest and XRP cheapest on one-week implied volatility versus seven-day realised volatility. One-week ATM IV level dispersion across the altcoin complex has compressed, with HYPE highest and TRX lowest.
Bitcoin one-week implied volatility fell 2.33 volatility points to 31.03%, leaving it 4.04 volatility points below seven-day realised volatility. At the same tenor, relative put-side volatility increased: 1W RR25 fell 1.07 volatility points to -1.02%. The longer-dated curve remained higher than the front end as the 1Y-minus-1W ATM IV slope widened to 10.97 volatility points.
Ether one-week RR25 fell 1.81 volatility points to -2.00%, leaving one-week relative put-side volatility richer than one-week call-side volatility. Ether one-week ATM IV fell 1.17 volatility points to 43.30%, while Ether front-end ATM IV across the 1W, 2W and 1M tenors averaged 46.23%, a decline of 0.43 volatility points in Ether front-end ATM IV across the 1W, 2W and 1M tenors. Ether’s 1Y-minus-1W ATM IV slope rose to 12.53 volatility points.
Solana’s front-end options repriced sharply lower: one-week ATM IV fell 7.61 volatility points to 53.34%, 13.19 volatility points below seven-day realised volatility. The front-end average declined 7.09 volatility points, more than the 3.99-point decline at the long end. One-week BF25 fell 1.47 volatility points to 3.42%, while short-dated relative put-side volatility increased.
Major-coin options saw a pronounced short-dated divergence: SOL one-week ATM IV fell 7.61 volatility points, versus a 1.17-point fall for ETH, creating a 6.44-point dispersion. SOL nonetheless retained the highest one-week ATM IV at 53.34%, 22.31 volatility points above BTC’s 31.03%. Ether carried the richest relative put-side volatility, with 1W RR25 at -2.00%.
Across the XRP, HYPE, AVAX and TRX options markets, the 1W ATM IV change range between AVAX and XRP was 6.29 volatility points. Across the XRP, HYPE, AVAX and TRX options markets, the 1W RR25 level spread between TRX and AVAX was 2.80 volatility points.
SOL 1W ATM IV fell 10.73 volatility points to 55.40%, an exceptional move at the 100th percentile. SOL front-end ATM IV fell 9.62 volatility points to 55.37%, while SOL long-dated ATM IV fell 3.93 volatility points to 54.88%. The 1Y-minus-1W ATM IV slope became less inverted by 7.02 volatility points to -0.54 volatility points.
SOL’s 1W ATM IV fell 10.73 volatility points, compared with a 0.78-point decline in ETH 1W ATM IV and a 0.81-point decline in BTC 1W ATM IV. That left 9.95 volatility points of 1W ATM IV change dispersion. The front-end convergence came with distinct skew and curve profiles.
The altcoin complex’s 1W ATM IV changes spanned 10.73 volatility points, from a 7.75-point decline in XRP to a 2.98-point increase in TRX. HYPE retained the highest 1W ATM IV level, while XRP held the most call-rich 1W RR25 level. The cross-section remains the story rather than a set of separate asset moves.
Daily reports from 18 July 2026 pair the measured surface change with a readable news briefing and links to the original collected stories. Earlier editions preserve surface analysis without retroactively implying news coverage.
