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24-hour surface comparison

Daily BTC options surface reports.

The complete daily Derivasys BTC options surface report archive, with 24-hour ATM IV, RR25, BF25 and fitted-smile changes. Reports from 18 July 2026 also include linked news context.

Reports from 18 July 2026 include contextual news. Earlier reports contain measured surface analysis only.

Daily archive

Newest daily report first.

186 reports

BTC Daily · News context

Bitcoin options accompany a 2.52% 24-hour spot-index gain

Bitcoin's spot index gained 2.52% over the 24-hour report window, according to Derivasys data. The advance accompanied a modest increase in average front-end implied volatility and a relative skew shift toward puts. Those observations describe different dimensions of the market: the underlying gained while relative put-side volatility strengthened against calls. At-the-money implied volatility measures volatility implied by prices of options near the current underlying price; its movement need not mirror the direction of spot.

Average ATM Δ
+0.17 vol pts
Average RR25 Δ
-0.17 vol pts
Average BF25 Δ
+0.10 vol pts
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BTC Daily · News context

Bitcoin options: 1w butterfly falls 0.38 volatility points

Bitcoin 1W BF25 declined 0.38 volatility points from 2.13 to 1.75 points between the October 18 and October 19 cutoffs, according to Derivasys data. The butterfly adjustment was modest in absolute terms but ranked at the 91.3 percentile among 23 matching prior daily observations. Front-end ATM implied volatility also fell, while put-side volatility retained a premium over calls.

Average ATM Δ
-0.76 vol pts
Average RR25 Δ
+0.11 vol pts
Average BF25 Δ
-0.11 vol pts
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BTC Daily · News context

Bitcoin options: 1w ATM implied volatility rises 3.17 points

Bitcoin's 1W ATM implied volatility rose 3.17 volatility points to 34.53% between October 17 and October 18 at 16:31 UTC, according to Derivasys data. Bitcoin's 1W ATM implied volatility had stood at 31.36% at the opening cutoff. This was the largest standard-tenor ATM IV move. The stronger front-end increase narrowed the gap between weekly and monthly implied volatility while leaving the curve positively sloped.

Average ATM Δ
+1.36 vol pts
Average RR25 Δ
+0.03 vol pts
Average BF25 Δ
-0.04 vol pts
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BTC Daily · No relevant catalyst identified

Bitcoin options: 1w skew moves further toward puts

Bitcoin 1W call-minus-put RR25 fell 1.81 volatility points to -4.46 points versus the October 16 cutoff, extending an existing put-side skew. The adjustment came alongside a rise in 1W ATM implied volatility and greater 1W smile curvature, while the gap between 1M and 1W ATM implied volatility narrowed.

Average ATM Δ
+0.97 vol pts
Average RR25 Δ
-0.47 vol pts
Average BF25 Δ
+0.08 vol pts
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BTC Daily · News context

Bitcoin options: 1w ATM IV drops 4.50 volatility points

Bitcoin 1W ATM implied volatility fell 4.50 volatility points to 28.80% between the October 15 and October 16 cutoffs, leading the standard-tenor declines in Derivasys data. Average ATM IV across 1W, 2W and 1M fell 2.97 points to 31.93%. One-week skew became less negative while butterfly curvature declined, adding detail to the front-end repricing.

Average ATM Δ
-2.12 vol pts
Average RR25 Δ
+0.05 vol pts
Average BF25 Δ
-0.27 vol pts
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BTC Daily · News context

Bitcoin options: 18oct26 smile rotation rises 6.89 volatility points

Bitcoin's 18OCT26 options smile rotation rose 6.89 volatility points against the prior daily cutoff, according to Derivasys data. The shift across strikes accompanied a 0.81-point rise in 1W RR25 to -3.45 volatility points, leaving put implied volatility above call implied volatility. Matching history for the expiry-specific rotation is unavailable, preventing a rarity assessment.

Average ATM Δ
-0.01 vol pts
Average RR25 Δ
+0.52 vol pts
Average BF25 Δ
+0.02 vol pts
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BTC Daily · News context

Bitcoin options: wing premium widens as 2w BF25 rises 0.55 volatility points

Bitcoin’s 2W BF25 butterfly increased 0.55 volatility points from 1.72 to 2.27 between the October 13 and October 14 16:30 UTC snapshots. The rise widened average 25-delta wing volatility relative to ATM volatility. Higher front-end implied volatility and a further shift in 1W skew toward puts accompanied the curvature adjustment.

Average ATM Δ
+1.02 vol pts
Average RR25 Δ
-0.73 vol pts
Average BF25 Δ
+0.27 vol pts
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BTC Daily · News context

Bitcoin options: 16oct26 smile rotation falls 5.00 volatility points

Bitcoin's 16OCT26 smile rotation fell 5.00 volatility points between the October 12 and October 13 cutoffs at 16:30 UTC, according to Derivasys data. This expiry-specific shape change exceeded the fixed-tenor ATM IV adjustments, led by a 0.68-point fall at 2W. Matching rotation history and its current level are unavailable, so the observation establishes neither historical rarity nor call-versus-put direction.

Average ATM Δ
-0.22 vol pts
Average RR25 Δ
-0.09 vol pts
Average BF25 Δ
+0.10 vol pts
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BTC Daily · News context

Bitcoin options: narrower wing premium as Bitcoin's 1w BF25 falls 0.29 volatility points

Bitcoin's 1W BF25 fell 0.29 volatility points to 1.57 points between the October 11 and October 12 cutoffs, reducing butterfly convexity. Average wing implied volatility narrowed relative to ATM, while supporting readings showed a smaller put-side skew advantage and limited daily movement in front-end ATM volatility.

Average ATM Δ
+0.05 vol pts
Average RR25 Δ
+0.23 vol pts
Average BF25 Δ
-0.09 vol pts
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BTC Daily · News context

Bitcoin options: 1w ATM IV rises 1.73 volatility points, leading the curve higher

Bitcoin's 1W ATM implied volatility rose 1.73 volatility points to 32.48%, the largest increase among supported fixed tenors between the October 10 and October 11 snapshots at 16:30 UTC. Shorter maturities led the daily repricing, narrowing the positive gap between 1M and 1W ATM implied volatility.

Average ATM Δ
+0.74 vol pts
Average RR25 Δ
-0.29 vol pts
Average BF25 Δ
+0.03 vol pts
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BTC Daily · News context

Bitcoin options: 1w RR25 drops 1.03 volatility points, widening put premium

Bitcoin's 1W RR25 fell 1.03 volatility points to -2.99 volatility points against the October 9 snapshot, widening the relative put premium at the October 10 cutoff. Both observations were taken at 17:02 UTC. Nearby ATM implied volatility diverged, with 1W falling while 2W and 1M rose.

Average ATM Δ
-0.12 vol pts
Average RR25 Δ
-0.61 vol pts
Average BF25 Δ
-0.01 vol pts
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BTC Daily · News context

Bitcoin options: 1w ATM IV falls 5.34 volatility points

Bitcoin 1W ATM IV fell 5.34 volatility points to 31.11% versus the October 8 16:56 UTC cutoff. The October 9 snapshot shows the decline concentrated in shorter maturities, with 6M ATM IV barely changing. One-week skew shifted toward calls but remained negative, while Thailand’s forthcoming ETF rules and reported Bitcoin ETF outflows provided institutional context.

Average ATM Δ
-2.33 vol pts
Average RR25 Δ
+0.48 vol pts
Average BF25 Δ
-0.15 vol pts
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BTC Daily · News context

Bitcoin options: 1w RR25 falls 3.14 points toward puts

Bitcoin 1W RR25 shifted 3.14 volatility points toward puts since the prior daily cutoff, reaching -3.64 points. The call-minus-put volatility gap became more negative as short-dated ATM implied volatility also increased. Bitcoin ETF outflows and government wallet movements provide reporting context, without an established causal link to the skew change.

Average ATM Δ
+2.35 vol pts
Average RR25 Δ
-1.70 vol pts
Average BF25 Δ
+0.22 vol pts
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BTC Daily · News context

Bitcoin falls 2.56% with modest IV changes

Bitcoin's 24-hour spot-index return was -2.56% from October 6 at 16:30 UTC to October 7 at 16:30 UTC. Options repricing remained limited: 1M ATM implied volatility increased 0.36 volatility points to 34.99%. Separate reporting on Bitcoin ETF inflows and Ledger's wrapped-Bitcoin borrowing launch adds context without establishing a cause for the measured changes.

Average ATM Δ
+0.14 vol pts
Average RR25 Δ
+0.05 vol pts
Average BF25 Δ
-0.05 vol pts
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BTC Daily · News context

Bitcoin options: 1w ATM implied volatility falls 0.77 points

Bitcoin's 1W ATM implied volatility declined 0.77 volatility points to 31.64% between the October 5 and October 6 snapshots at 17:08 UTC, the largest supported standard-tenor ATM move. The adjustment was classified as routine, with shorter tenors easing while 1M implied volatility rose. Bitcoin ETF outflows, expanded Bitcoin-backed borrowing and leveraged-fund listing approval provide news context, without an established link to the options changes.

Average ATM Δ
-0.11 vol pts
Average RR25 Δ
+0.29 vol pts
Average BF25 Δ
-0.03 vol pts
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BTC Daily · News context

Bitcoin options: 2w RR25 drops through zero toward puts

Bitcoin options shifted toward puts as Bitcoin 2W RR25 declined 1.14 volatility points to -0.30 volatility points between October 4 and October 5 at 16:29 UTC, according to Derivasys data. RR25 measures call implied volatility minus put implied volatility, so its negative reading means put-side implied volatility exceeded call-side implied volatility at that tenor. ATM volatility changes were smaller, while separate reports of Strategy and Strive Bitcoin purchases provided context without establishing a cause for the skew shift.

Average ATM Δ
+0.15 vol pts
Average RR25 Δ
-0.66 vol pts
Average BF25 Δ
+0.04 vol pts
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BTC Daily · News context

Bitcoin options: 1w ATM volatility rises 2.87 points, outpacing longer tenors

Bitcoin's 1W at-the-money implied volatility climbed 2.87 volatility points to 31.90%, the largest standard-tenor ATM move in the daily comparison ending 4 October. Gains diminished at longer maturities, while one-week implied volatility stayed below seven-day realised volatility. Newly published ETF, El Salvador and Hormuz reports provide context, with no established causal link to the repricing.

Average ATM Δ
+1.09 vol pts
Average RR25 Δ
+0.63 vol pts
Average BF25 Δ
+0.11 vol pts
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BTC Daily · No relevant catalyst identified

Bitcoin options: 2w ATM volatility falls

Bitcoin two-week ATM IV fell 0.84 volatility points to 30.68% between October 2 and October 3, a routine move as the spot index gained 0.28%. The comparison describes the options surface at the report cutoff; it does not establish a news catalyst or a forecast for the underlying price.

Average ATM Δ
-0.16 vol pts
Average RR25 Δ
+0.20 vol pts
Average BF25 Δ
-0.09 vol pts
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BTC Daily · News context

Bitcoin options see one-month RR25 skew rise

BTC 1M RR25 moved 1.03 volatility points toward calls to -1.04% between the October 1 and October 2 snapshots at 16:30 UTC, according to Derivasys data. BTC 1M RR25 stood at -2.07% at the prior daily snapshot. Puts retained higher implied volatility than calls.

Average ATM Δ
-0.50 vol pts
Average RR25 Δ
+0.61 vol pts
Average BF25 Δ
-0.05 vol pts
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BTC Daily · News context

Bitcoin options see one-month RR25 skew fall

Bitcoin’s one-month call-minus-put RR25 fell 1.07 volatility points to -2.07% in the 24 hours to October 1 at 16:30 UTC, while one-week ATM implied volatility declined 0.87 points to 29.99%, according to Derivasys.

Average ATM Δ
-0.10 vol pts
Average RR25 Δ
-0.66 vol pts
Average BF25 Δ
+0.10 vol pts
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Permanent monthly index

Every report remains directly linked.

October 2026 24 reports
September 2026 30 reports
August 2026 31 reports
July 2026 31 reports
June 2026 30 reports
May 2026 31 reports
April 2026 9 reports

Publication coverage

Every valid database date is accounted for.

131 dates from 21 April 2026 through 30 August 2026 passed the snapshot-pair and surface-data checks and have permanent reports.

21 April 2026 omitted: No comparison snapshot exists within three hours of 2026-04-20T23:59:00+00:00

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