01 · Week in review
Macro · Crypto · OptionsThe week in markets.
Bitcoin’s week was shaped by a renewed institutional bid, an abrupt change in the US rates narrative and a large derivatives expiry. Treasury plans for bigger bond buybacks helped weaken the dollar and revive the debasement trade, while strong ETF inflows carried Bitcoin through $80,000. Inflation data and Kevin Warsh’s Jackson Hole debut later restored some policy caution. The options market traced the same unsettled path: front-end volatility rose sharply, reversed just as quickly and ended the week 8.75 points lower at the one-week tenor.
Bitcoin’s rebound returns corporate treasuries to firmer ground
A quiet macro session left crypto-specific positioning in charge. Bitcoin’s recovery improved the mark-to-market position of large corporate holders, while increasingly bullish year-end forecasts underlined how quickly sentiment had turned after the earlier drawdown.
Macro
No material scheduled macro release in the source set displaced the crypto rebound as the principal market story for the session.
Crypto
Strategy’s Bitcoin treasury moved back towards break-even as the market rallied, while Standard Chartered argued that its $100,000 year-end target might prove conservative.
ETF demand supplies the weekend’s clearest signal
With conventional markets largely absent, fund flows provided the cleanest account of demand. US spot Bitcoin ETFs had taken in $1.92bn over the week, their strongest showing since October 2025, even as the options surface softened modestly into Sunday.
Macro
The weekend produced no sufficiently material macro event in the source set, leaving the coming Jackson Hole programme as the next policy focus.
Crypto
US spot Bitcoin ETFs recorded their strongest weekly inflow in ten months, reinforcing the institutional bid after Bitcoin briefly moved above $78,000.
Jackson Hole moves into view as Strategy builds a cash buffer
Markets began the working week looking towards Kevin Warsh’s first Jackson Hole address, with bond-market unease setting the tone. In crypto, Strategy raised $2bn through share sales and created a dollar reserve rather than immediately adding to its Bitcoin holdings.
Macro
The new Fed chair faced an early communications test as investors looked for clarity on inflation, productivity and the pressure building in longer-dated government bonds.
Crypto
Strategy raised $2bn from equity sales and established a dollar liquidity reserve, extending its pause in Bitcoin purchases while preserving capacity for future buying.
Treasury buybacks weaken the dollar and carry Bitcoin towards $80,000
Plans to expand purchases of older long-dated Treasuries flattened the yield curve and pushed investors back towards the debasement trade. Bitcoin approached $80,000 after the strongest week of ETF demand in ten months, while short-dated implied volatility and call skew rose with it.
Macro
The US Treasury’s proposed expansion of bond buybacks drove the day’s cross-asset move, supporting gold, flattening the curve and weighing on the dollar.
Crypto
Bitcoin’s rally accelerated towards $80,000 after a strong run of US ETF subscriptions, pushing the asset back to the centre of the broader liquidity trade.
Inflation edges higher as the market turns towards Friday’s expiry
July’s US personal income and spending report kept inflation risk alive without producing a decisive macro shock. Crypto attention shifted from the rally to market structure: ETF inflows remained firm, but a $6.4bn Bitcoin options expiry now loomed over the end of the week.
Macro
US personal income rose 0.4 per cent in July and the Fed’s preferred inflation measure ticked higher, leaving policy expectations sensitive ahead of Jackson Hole.
Crypto
The market began to position around Friday’s $6.4bn Bitcoin options expiry, even as another burst of subscriptions extended the run of strong US spot ETF demand.
Nvidia lifts risk appetite while Europe keeps its policy options open
A strong Nvidia result supported technology shares and Bitcoin, but central-bank caution did not disappear. The ECB’s July account showed a market still shaped by trade, energy and geopolitical risks, while Bitcoin ETF inflows slowed and derivatives traders prepared for settlement.
Macro
The ECB’s July meeting account described a still-uncertain inflation and growth outlook, with financial conditions exposed to trade policy, energy prices and geopolitics.
Crypto
Deribit’s weekly review linked the break in August’s volatility lull to the Treasury buyback story. Spot ETF inflows slowed to $232m, though their eight-day total reached $2.8bn.
Warsh’s inflation warning lands as $6.4bn of Bitcoin options expire
The week ended with monetary policy and derivatives positioning colliding in the same session. Kevin Warsh resisted giving markets an easing signal at Jackson Hole, Bitcoin struggled to sustain $80,000 and the expiry was followed by a sharp fall in one-week implied volatility.
Macro
At Jackson Hole, Kevin Warsh said the Fed still had work to do on inflation and gave no steer towards near-term rate cuts, keeping the policy backdrop restrictive for risk assets.
Crypto
The $6.4bn Deribit expiry covered almost one-fifth of the exchange’s Bitcoin open interest. Bitcoin had earlier joined a broader risk rally after Nvidia’s earnings but failed to hold a clean break above $80,000.
Editorial summaries are grounded in canonical events returned by the local news MCP. Links identify the underlying reporting; events are context, not assigned causes.
02 · Options Market Read
What the volatility surface did.
1W ATM IV fell 8.75 volatility points to 36.57%, a notable move at the 82nd percentile. Front-end ATM IV averaged 36.88%, -5.91 points from the prior snapshot, while the long end averaged 42.04%, -1.03 points. The 1Y-minus-1W ATM slope steepened 8.15 points to 6.31 points. 2W RR25 moved 1.90 volatility points toward puts to 0.82%, leaving calls richer than puts. 2W BF25 fell 0.88 volatility points to 1.82%. The nearest eligible forward, 4SEP26, rose $1,578.76 (+2.03%) to $79,387.16. Relevant context found; no confirmed catalyst; the strongest assessed relationship has low causal confidence.
Derived directly from structured Derivasys surface data03 · Catalyst check
21 Aug 2026, 15:29 UTC to 28 Aug 2026, 15:29 UTCRelevant context found; no confirmed catalyst
Relevant market events
2 events were retained after relevance scoring and event-level deduplication.
News is presented as contextual association unless the structured evidence supports a stronger relationship.
30 canonical events scanned through the news MCP across 14 publishers. 30 fell inside the report window; 30 were BTC-tagged; 2 passed the final threshold; 2 events displayed.
03 · Weekly summary
What changed across the BTC volatility surface.
Front-end ATM IV decreased, averaging -5.91 volatility points to 36.88% across 1W, 2W and 1M.
Long-dated ATM IV decreased, averaging -1.03 volatility points to 42.04% across 6M and 1Y.
RR25 moved towards puts, averaging -0.34 volatility points to 0.19% across the six headline tenors.
BF25 decreased, averaging -0.41 volatility points to 2.21% across the six headline tenors.
The largest standard-tenor ATM IV move was -8.75 volatility points at 1W, to 36.57%.
Weekly universe roll: added 18SEP26, 1SEP26, 27NOV26, 29AUG26, 30AUG26, 31AUG26; removed 22AUG26, 23AUG26, 24AUG26, 25AUG26, 28AUG26. Listed-expiry changes use contracts present at both endpoints.
04 · Seven-day ranking
Largest weekly surface events
Largest standard-tenor ATM IV move
1W, -8.75 vol ptsLargest eligible smile rotation
4SEP26, -4.15 vol ptsLargest standard-tenor RR25 move
2W, -1.90 vol ptsLargest standard-tenor BF25 move
2W, -0.88 vol ptsLargest eligible SVI rho move
30OCT26, -0.3821 paramLargest eligible SVI sigma move
26MAR27, -0.2285 param05 · ATM volatility
Week-end against week-opening ATM volatility.
| Tenor | Week end (vol %) | Week start (vol %) | Change (vol pts) | Relative change |
|---|---|---|---|---|
| 1W | 36.57 | 45.32 | -8.75 vol pts | -19.31% |
| 2W | 36.64 | 42.27 | -5.63 vol pts | -13.32% |
| 1M | 37.43 | 40.78 | -3.35 vol pts | -8.21% |
| 3M | 39.29 | 41.67 | -2.38 vol pts | -5.71% |
| 6M | 41.20 | 42.66 | -1.46 vol pts | -3.42% |
| 9M | 42.23 | 43.12 | -0.89 vol pts | -2.06% |
| 1Y | 42.88 | 43.48 | -0.60 vol pts | -1.38% |
06 · During the week
Ranges and largest day-to-day repricings.
The generator sampled the final successful BTC surface on each of 8 observed UTC dates, so endpoint changes can be read alongside the path taken during the week.
ATM IV · 08-22 to 08-23
1W, +4.46 vol ptsATM IV · 08-23 to 08-24
1W, -4.36 vol ptsATM IV · 08-21 to 08-22
1W, -4.34 vol ptsATM IV · 08-25 to 08-26
1W, -4.29 vol ptsATM IV · 08-27 to 08-28
1W, -4.08 vol ptsATM IV · 08-25 to 08-26
2W, -3.40 vol pts| Tenor | ATM IV low | ATM IV high | ATM IV range | RR25 range | BF25 range |
|---|---|---|---|---|---|
| 1W | 36.57% | 46.85% | 10.28 vol pts | 2.53 vol pts | 0.87 vol pts |
| 2W | 36.64% | 43.34% | 6.70 vol pts | 2.15 vol pts | 1.17 vol pts |
| 1M | 37.43% | 41.54% | 4.11 vol pts | 2.82 vol pts | 0.78 vol pts |
| 3M | 39.29% | 41.92% | 2.63 vol pts | 2.22 vol pts | 0.90 vol pts |
| 6M | 41.20% | 42.62% | 1.42 vol pts | 2.03 vol pts | 0.42 vol pts |
| 9M | 41.67% | 42.92% | 1.25 vol pts | 1.95 vol pts | 0.65 vol pts |
| 1Y | 41.77% | 43.26% | 1.49 vol pts | 1.93 vol pts | 0.85 vol pts |
Daily report trail
The validated reports behind the weekly path.
This weekly edition reuses the stored headline, reader summary, news outcome and principal ATM fact from each published daily report inside the comparison window.
| Date | Published daily report | Largest daily ATM move | News outcome |
|---|---|---|---|
| BTC front-end IV catches up with seven-day realised volatility | 1W: +4.73 vol pts to 44.02% | Relevant context found; no confirmed catalyst | |
| BTC options soften across maturities as put-side volatility rises modestly | 1Y: -1.62 vol pts to 41.95% | Relevant context found; no confirmed catalyst | |
| BTC options ease at the front end while call-side volatility firms modestly | 1M: -0.24 vol pts to 39.86% | No sufficiently relevant context identified | |
| BTC options reprice higher as front-end volatility leads | 2W: +3.59 vol pts to 44.58% | Relevant context found; no confirmed catalyst | |
| BTC options volatility rises as call-side skew strengthens | 1W: +3.22 vol pts to 45.85% | Relevant context found; no confirmed catalyst | |
| BTC front-end volatility retreats as options expiry approaches | 1W: -4.76 vol pts to 38.76% | Relevant context found; no confirmed catalyst | |
| BTC front-end volatility rises as call-side skew firms | 1W: +2.25 vol pts to 41.57% | Relevant context found; no confirmed catalyst | |
| BTC options volatility falls sharply at the front end as skew shifts modestly toward puts | 1W: -5.26 vol pts to 36.57% | Relevant context found; no confirmed catalyst |
07 · Skew and convexity
RR25 and BF25 over the seven-day window.
RR25 moved towards puts, averaging -0.34 volatility points to 0.19% across the six headline tenors. The largest eligible RR25 movement was at 2W. Negative RR25 denotes a richer put wing.
| Tenor | Week end (vol %) | Week start (vol %) | Change (vol pts) |
|---|---|---|---|
| 1W | 0.68 | 1.73 | -1.05 vol pts |
| 2W | 0.82 | 2.72 | -1.90 vol pts |
| 1M | -0.81 | 0.89 | -1.70 vol pts |
| 3M | -0.05 | -0.83 | +0.78 vol pts |
| 6M | 0.09 | -0.78 | +0.87 vol pts |
| 9M | 0.28 | -0.67 | +0.95 vol pts |
| 1Y | 0.40 | -0.56 | +0.96 vol pts |
BF25 decreased, averaging -0.41 volatility points to 2.21% across the six headline tenors. The largest eligible BF25 movement was at 2W.
| Tenor | Week end (vol %) | Week start (vol %) | Change (vol pts) |
|---|---|---|---|
| 1W | 2.04 | 2.41 | -0.37 vol pts |
| 2W | 1.82 | 2.70 | -0.88 vol pts |
| 1M | 2.01 | 2.87 | -0.86 vol pts |
| 3M | 2.01 | 2.67 | -0.66 vol pts |
| 6M | 2.51 | 2.50 | +0.01 vol pts |
| 9M | 2.74 | 2.51 | +0.23 vol pts |
| 1Y | 2.86 | 2.56 | +0.30 vol pts |
08 · Listed expiries
Common exchange maturities at both weekly endpoints.
| Expiry | Time left | Forward end (USD) | Forward change (USD) | ATM IV end | ATM IV change | RR25 change | BF25 change |
|---|---|---|---|---|---|---|---|
| 4SEP26 | 6.7 days | 79,387.16 | +1578.76 USD | 36.57% | -5.77 vol pts | -2.10 vol pts | -0.64 vol pts |
| 11SEP26 | 13.7 days | 79,451.32 | +1592.37 USD | 36.56% | -4.76 vol pts | -1.29 vol pts | -0.75 vol pts |
| 25SEP26 | 27.7 days | 79,560.35 | +1582.18 USD | 37.42% | -3.19 vol pts | -1.48 vol pts | -1.00 vol pts |
| 30OCT26 | 62.7 days | 79,952.55 | +1660.14 USD | 37.51% | -3.33 vol pts | +1.12 vol pts | -0.46 vol pts |
| 25DEC26 | 118.7 days | 80,545.07 | +1752.86 USD | 40.22% | -2.18 vol pts | +0.66 vol pts | -0.50 vol pts |
| 26MAR27 | 209.7 days | 81,469.18 | +1921.24 USD | 41.44% | -1.31 vol pts | +0.92 vol pts | +0.14 vol pts |
| 25JUN27 | 300.7 days | 82,482.79 | +2170.50 USD | 42.47% | -0.81 vol pts | +0.94 vol pts | +0.24 vol pts |
06 · Smile movement
Reconstructed SVI smiles for common expiries.
Each overlay compares the fitted smile at the two weekly endpoints. Ultra-short expiries remain visible but do not determine headline rankings.
Weekly surface movement heatmap
Each cell is the fitted IV change in volatility points from week start to week end.
07 · SVI diagnostics
Weekly movement in a, b, rho, m and sigma.
Parameter changes are shown directly from the stored endpoint fits; no causal interpretation is attached.
| Expiry | Δ a | Δ b | Δ rho | Δ m | Δ sigma | Smile classification |
|---|---|---|---|---|---|---|
| 4SEP26 | +0.05270 | -0.05160 | -0.01500 | +0.02750 | -0.13580 | rotation towards puts, wing steepening |
| 11SEP26 | +0.02730 | -0.03730 | -0.05140 | -0.02160 | -0.02170 | rotation towards puts, wing steepening |
| 25SEP26 | +0.00670 | -0.02960 | -0.16150 | -0.10530 | +0.06320 | rotation towards puts |
| 30OCT26 | +0.01640 | +0.01160 | -0.38210 | -0.31610 | -0.08750 | parallel shift lower, rotation towards calls |
| 25DEC26 | +0.02580 | -0.00700 | -0.21410 | -0.22200 | -0.06600 | parallel shift lower, rotation towards calls |
| 26MAR27 | +0.08320 | -0.01890 | -0.22730 | -0.27660 | -0.22850 | parallel shift lower, rotation towards calls |
| 25JUN27 | +0.02980 | +0.00130 | -0.09090 | -0.15070 | -0.12620 | parallel shift lower |
08 · Methodology and provenance
Generated from validated surface data and stored reporting evidence.
- Week-end snapshot
- 28 Aug 2026, 15:29 UTC
- Week-opening snapshot
- 21 Aug 2026, 15:29 UTC
- Comparison
- Nearest successful surface snapshots approximately seven days apart
- Source
- Derivasys proprietary historical SVI surface database
- Snapshot selection
- The final successful BTC surface on each observed UTC date is included. This report contains 8 daily snapshots; an approximately seven-day window contains eight observations when both the start and end dates are present.
- Daily report inputs
- The weekly edition reuses 8 validated daily reports from 2026-08-21 through 2026-08-28; their stored headlines, reader summaries, news outcomes and principal ATM facts form the daily report trail.
- Calculations and commentary
- Metrics and takeaways are deterministic. Daily headlines and introductions may be model-assisted, constrained to the same stored facts; weekly prose is deterministic.
- 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 interpolated independently at 1W, 2W, 1M, 3M, 6M, 9M and 1Y; headline rankings prioritise 1W, 2W, 1M, 3M, 6M and 1Y.
- 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.
- Causal claims
- The report describes observed surface changes only and does not infer unsupported market drivers, spot moves, flows or forecasts.
This report contains 8 daily snapshots because both the start and end dates are observed within the approximately seven-day window.
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