Bitcoin options expiry: what happens to price on Deribit

Bitcoin options expiry is the moment a batch of contracts with the same date stops trading and gets cash-settled against an index price. On Deribit that happens every day at 08:00 UTC, with the biggest expiries on the last Friday of each month and quarter. Expiry itself does not set the direction of price: over the past year, the week after a monthly expiry was neither calmer nor wilder than an ordinary week. What matters is how dealers hedge into settlement and what gets released once it is over.

Below: how settlement works, where the "pinning" effect comes from, what 12 months of Deribit settlement data show, and what the next big expiry on October 30, 2026 looks like.

What is a bitcoin options expiry?

An option gives the right to buy (call) or sell (put) bitcoin at a strike price on a set date. That date is the expiry. Deribit options are European-style, so they can only be exercised at expiry, not before.

No bitcoin is physically delivered. Options are cash-settled: in-the-money positions receive the difference between the settlement price and the strike, everything else expires worthless. As crypto.news explains, Deribit's inverse options settle in BTC, while its USDC-margined linear options have, since April 2026, exercised into a future that is then cash-settled.

That is the first correction to "$14 billion in options expire today" headlines. The figure is notional (open interest times price), not money changing hands. Only the intrinsic value of in-the-money contracts is actually paid out, and that is usually a fraction of the headline.

When do bitcoin options expire on Deribit?

Deribit is still the largest crypto-native venue for bitcoin options. In 2026, options on BlackRock's IBIT exchange-traded fund caught up: per Whale Alert, as of May 21, 2026 Deribit held $31.3B in bitcoin options open interest versus $27B for IBIT. IBIT options follow US equity-market calendars and settlement rules, so this guide focuses on Deribit.

08:00 UTC is 4:00 AM ET during US daylight saving time and 3:00 AM ET after clocks change on November 1. Quarterly expiries usually carry the most contracts. The March 27, 2026 quarterly, for example, had about $14.16B in bitcoin options according to CryptoSlate, close to 40% of Deribit's BTC open interest.

How is the settlement price calculated?

The settlement (delivery) price is not the price at 08:00 sharp. It is a time-weighted average of the Deribit index over the final 30 minutes, 07:30 to 08:00 UTC, with the index sampled every 4 seconds, as CryptoSlate describes. The index blends prices from several spot exchanges, which makes it hard to move the result with one large trade on one venue.

Deribit publishes every past settlement price through its public API (public/get_delivery_prices). On September 25, 2026, the day of the Q3 quarterly expiry, the BTC delivery price was $83,930.84.

CME bitcoin futures settle against a different benchmark, the CME CF Bitcoin Reference Rate, a once-a-day rate built from trades on several exchanges. That is why CME and Deribit expiries land at different times of day.

What happens to price before expiry: gamma and pinning

The core mechanism is market-maker (dealer) hedging. Dealers keep their options books roughly price-neutral by buying and selling bitcoin or futures. How they do it depends on the sign of their gamma, i.e. how fast option delta changes as price moves.

1. Dealers long gamma. Their hedging buys dips and sells rallies. That dampens swings and can hold price near strikes with heavy open interest, the so-called pin. This is how CryptoSlate lays out the mechanics.
2. Dealers short gamma. Hedging runs with the move: they buy into strength and sell into weakness, amplifying rather than damping it.
3. The effect sharpens near expiry. Gamma on at-the-money options rises as time to expiry shrinks to hours, so hedging flows are strongest in the final days.
4. Settlement removes the pressure. Expired contracts no longer need hedging and some positions roll to later dates. The pin disappears and price can move more freely.

Dealer gamma is not published directly; analytics firms estimate it with assumptions. So the same expiry can pin price to a strike or speed up a breakout. For the strike where option buyers lose the most, see our guide to bitcoin max pain.

What the data show: 12 monthly expiries

We pulled Deribit settlement prices from its public API for the last 12 monthly and quarterly expiries and compared the price change over the 7 days before and the 7 days after each one.

What stands out:

• No direction. Price was higher a week after expiry 7 times out of 12, lower 4 times, and flat once. That looks more like chance than a pattern.
• The week after is not reliably volatile. The median absolute 7-day move after expiry was 2.15%, versus 3.1% for any 7-day window over the same year using the same settlement prices. The mean runs the other way (4.9% vs 4.3%) because of two crashes, in the weeks after the January 30 and May 29, 2026 expiries.
• Big moves have bigger causes. Ahead of the March 27, 2026 expiry bitcoin dipped to $66,200, but CryptoSlate put macro first: oil above $105, rising Treasury yields and fading hopes for Fed cuts. Expiry only accelerated the move.

Twelve data points are too few for any claim of statistical significance. An academic study by Blasco, Corredor and Satrústegui (2023) found shifts in volume, volatility and returns around bitcoin futures expirations, varying across exchanges and contract designs. We did not find comparable peer-reviewed work on bitcoin options specifically.

Example: the October 30, 2026 expiry

Our Deribit data as of 4:00 AM ET on October 18, 2026 (see the bitcoin market data block):

• total bitcoin options open interest: 388,700 BTC, about $31.7B;
• next big expiry: October 30, 2026 (last Friday of the month), with 149,581 BTC, roughly $12.2B at an index price of $81,573, or about 38% of all open interest;
• max pain for that date: $79,000, with a put/call ratio of 0.52, meaning nearly twice as many calls as puts;
• next quarterly: December 25, 2026, with 130,955 BTC and max pain at $75,000;
• DVOL implied volatility index: 37.85, up from 36.99 a week earlier.

For context, ahead of the September quarterly, Crypto Briefing put max pain at $72,000⁠–⁠75,000 as of September 14, 2026, yet the September 25 settlement came in at $83,931, 12⁠–⁠17% higher. So the $79,000 max pain for October 30 is a reference level, not a price target. Live price and options data are on the dashboard and the bitcoin page.

Common mistakes

• Treating notional as real money. "$12B expiring" is open interest at the index price. Many positions roll or close early, and payouts on in-the-money contracts are far smaller.
• Expecting price to gravitate to max pain. September 2026 is a fresh counterexample.
• Mixing up times. Deribit settles at 08:00 UTC; CME uses its own benchmark at a different time. The ET equivalent shifts when US clocks change.
• Watching only one venue. In 2026, IBIT options matched Deribit in size, and their hedging flows matter too.
• Ignoring the backdrop. Fed decisions, inflation data and ETF flows move bitcoin more than expiry does; see Fed rates and bitcoin. Futures hedges tie closely to open interest.

FAQ

What time do bitcoin options expire? On Deribit, at 08:00 UTC. The settlement price is the index average over 07:30⁠–⁠08:00 UTC.

Does bitcoin drop after options expiry? There is no consistent pattern. Over the last 12 monthly expiries, price a week later was up 7 times, down 4 times and flat once.

Why does the last Friday of the month matter most? Monthly and quarterly contracts expire then, so it carries the largest share of open interest and the most visible hedging flows.

Where can I check the next expiry? On Deribit's statistics page and in our bitcoin market data block: date, size in BTC, max pain and put/call.

This is not investment advice.