Max pain vs gamma exposure

Both numbers are built from exactly the same input — the open interest sitting on an option chain. They are not competing estimates of the same thing. One names a price; the other describes a temperament. Confusing the two is the most common mistake beginners make with options data.

The short version

Same input, different question

An option chain is a list of strikes with two counts attached to each: how many calls are outstanding, how many puts. That is the entire raw material.

Max pain treats it as a payout problem. Pretend the stock settles at each strike in turn, add up what all the in-the-money contracts would pay, and find the cheapest outcome. The answer is a single price, and it is pure arithmetic — no volatility, no model, no fitted parameters.

Gamma exposure treats the same list as a hedging problem. Every one of those contracts sits on a dealer's book, and that dealer holds stock against it. As price moves, the amount of stock they need changes, and they are obliged to trade. Adding that obligation up across the chain gives a dollar figure per 1% move, and its sign tells you whether the resulting flow leans against the market or with it.

A worked contrast

Take a stock at $100. The front expiration produces:

• Max pain $98 — 2% below the current price.
• Net GEX −$400 million per 1% move, with the gamma flip at $102.

A beginner reads that as two bearish signals and gets it wrong twice. Here is what the two numbers actually say.

Max pain at $98 says that if this stock were to settle at $98 on expiration day, the total payout to option holders would be smaller than at any other strike. That is a statement about a hypothetical settlement, not a prediction that it will happen, and the historical pull toward such levels is weak and confined to the final day or two.

Net GEX of −$400M with the flip at $102 says something with no direction in it at all: because price is below the flip, dealer hedging is estimated to run with the market. If the stock rallies, hedging buys; if it drops, hedging sells. That makes moves in either direction travel further than they otherwise would. It does not favour down.

Combine them honestly and you get: "a crowded strike sits a little below, and today's environment is the kind where moves tend to extend rather than fade." That sentence is genuinely useful for deciding how wide to expect the day's range to be. It is not a reason to take a position, and there is no historical study saying this combination predicts anything.

Four configurations, read plainly

What the evidence supports, and what it does not

Being clear about this is more useful than another chart.

• Hedging flows are real. That dealers hold and adjust share hedges against option books is not a theory; it is how the business works. The GEX mechanism is sound even where the GEX number is rough.
• Expiration-day clustering is documented. Research on US equity options finds stock prices land near option strikes on expiration dates more often than chance predicts, and traces it to hedge unwinding rather than manipulation. That supports a weak effect at individual heavy strikes, in the final days.
• Neither result is a max pain result. Max pain is a whole-chain balance point, not a strike, and no body of evidence says price gravitates to it on a weekly or monthly horizon.
• The GEX sign can simply be wrong. Public GEX assumes the dealer side of every contract. Where that assumption fails for a particular name, the regime label inverts, and nothing on the page will warn you.
• No published edge. There is no well-established, out-of-sample study showing that trading either number, or the combination, produces reliable profit. If a dashboard implies otherwise, ask to see the held-out results.

That last standard is the one Quant Data holds its own paid products to. The day-type model behind Brooks Daily Bias is published with its held-out accuracy — 66% top-1 and 80% top-2 across five day types, against a 37% majority baseline — and with the cases where it fails, including three markets where the pre-registered tests came back negative. Small honest numbers beat large unverifiable ones.

Live side by side

Every ticker with both metrics — 50 of them, 13 currently trading between the two levels. Front expiration for max pain. Recomputed nightly from end-of-day open interest; latest snapshot in this table: 2026-07-23.

All tickers, including those with no GEX estimate

Read next

If either concept is still fuzzy, both guides work the maths through by hand: what is max pain on a five-strike example, and what is gamma exposure from one option and one hedge. The guides index lists everything.

All levels here are derived metrics computed nightly from end-of-day open interest — not raw market data, not live quotes (how we compute them). Educational only: not investment advice, not a recommendation, not a price forecast.