Friday's $10.8 Billion Bitcoin Expiry Pins Max Pain at $78,000 — and 80,000 Is the Only Balanced Strike in the Book

Deribit's 30 October expiry settles at 08:00 UTC on Friday, and at the snapshot taken for this piece (26 October, around 14:00 UTC) it carried 135,728 contracts of open interest — one bitcoin per contract — worth $10.79 billion at the exchange's BTC index of $79,497.29. Calls account for 87,452 of those contracts, puts for 48,276. The put/call ratio is 0.55.

The total is not the interesting part. Where it sits is. Only 18,054 BTC — 13.3% of the expiry, $1.44 billion — is struck within 5% of spot. The other 86.7% is either already deep in the money or, far more often, so far out of it that it cannot be reached by Friday. This is not a book built for this week. It is a book built for a move that has not happened yet.

Max pain at $78,000, 1.88% under the index

Run the expiry through the standard max-pain calculation — the settlement price that minimises the total value of in-the-money contracts — and the answer is $78,000, which is $1,497 below the index and 1.88% under spot.

The bowl is shallow, which matters more than the single number. At $78,000 the book would settle $126.3 million of intrinsic value. At $77,000 it settles $127.1 million; at $79,000, $127.6 million — both inside 1% of the minimum. The curve only starts climbing above $80,000, where it reaches $130.2 million, then $167.9 million at $84,000 (33% over the floor) and $204.1 million at $70,000 (62% over). Read it as a zone: the least money changes hands between $77,000 and $79,000, and spot is already sitting on the top edge of it.

The $95,000 call wall is 19.5% away with four sessions left

Friday's biggest single line is 19,951 call contracts at $95,000 — $1.60 billion of notional — followed by 11,284 at $100,000 and 10,715 at $90,000. Calls at or above $90,000 add up to 58,787 BTC: 67.2% of the expiry's call open interest and $4.67 billion of notional, all of it at least 13.2% above the index.

That is the shape of a lottery-ticket book. Bitcoin closed at $79,714 on the last daily candle, 6.8% below where it opened the 20-session window at $85,550, with an October high of $84,898 set on 21 October and a 24-hour change of -0.83%. Four sessions is not enough room to reach the $90,000 strike, let alone the one at $95,000 that carries the largest premium in the book.

Downside: 69% of the puts sit below $76,000

The put side is lopsided in the other direction. 33,471 contracts — 69.3% of Friday's puts — are struck below $76,000. The largest single line is 4,377 puts at $70,000, $348 million of notional at the index, with 2,997 at $75,000, 2,658 at $72,000, 2,579 at $71,000, 2,466 at $65,000 and 2,346 at $69,000 trailing behind it.

Below spot the puts total 39,568 BTC — $3.15 billion. Above spot the calls total 76,155 BTC — $6.05 billion. The expiry's entire skew comes from those two lines, and neither of them is near the price.

Why $80,000 is the line

On Friday's sheet, $80,000 is the only strike where the two sides meet: 1,388 calls against 1,593 puts, a ratio of 1.15. Every other round number is a one-way bet — $95,000 is 99% calls, $70,000 runs three puts for every call, and the $85,000 strike above spot carries 3,308 calls against 838 puts.

It is not a Friday-only number either. Across every expiry on the board, the $80,000 strike holds 20,213 BTC of open interest ($1.61 billion) — the fourth-largest line in the entire book behind $95,000 (27,361 BTC), $90,000 (25,403) and $100,000 (20,405). And bitcoin is trading underneath it: the last daily close was $79,714, today's session high of $80,951 failed, and the 24-hour change is -0.83%.

The other anchor is above. The average cost basis of the US spot ETFs is $81,500, and five sessions of outflows put bitcoin under it — so any settlement between $78,000 and $80,000 keeps the market below both the ETF cost line and the only strike in Friday's book where calls and puts are balanced.

November's book already centres $3,000 higher

The 27 November expiry is priced off a different map. Its max pain is $81,000 — 1.89% above spot, not below — on 39,530 BTC of open interest worth $3.14 billion. Its largest line is 4,168 calls at $90,000 and its put wall is 3,189 contracts at $75,000.

Total open interest across the eleven expiries listed on the exchange is 390,647 BTC, or $31.06 billion. Friday's expiry is 34.7% of that, and it is the only one this month whose centre of gravity sits below the market price.

What to watch before 08:00 UTC Friday

Three numbers. $80,000 is the pin and the level where the expiry stops being a pure call-side book. $78,000 is max pain, 1.9% lower. $76,000 is the top of the deep-put shelf, where the other 69% of the downside protection starts to matter.

Max pain is a mechanical calculation, not a forecast — it says where the least contract value settles, not where price will be. What it does mark reliably is the strikes where market makers carry the most offsetting exposure into a monthly settlement, and this month those strikes sit in a $2,000 band around spot rather than at the $95,000 level the call open interest advertises. Friday's expiry had traded 2,684 BTC of volume by the time of this snapshot; the rest of the book has four sessions to decide whether it is worth anything.