Max pain is the strike price at which all open options for one expiry would expire with the least total value, so the price at which option holders, taken together, would collect the least. It is calculated from open interest, and some traders use it as a reference for where a stock may settle into expiry.
How it works
For each listed strike, treat that strike as the closing price at expiry and add up what every open contract would be worth there:
- Each call with a strike below the test price is worth (test price − call strike) × call open interest.
- Each put with a strike above the test price is worth (put strike − test price) × put open interest.
- Options out of the money at the test price are worth nothing.
The test price with the smallest total is max pain. Multiply by 100 for the dollar amount, since one contract covers 100 shares. The calculation uses intrinsic value only; it ignores the premium buyers paid and who holds each side.
The name comes from a simple story: option buyers lose the most at that price, and option sellers gain the most. The more practical explanation is hedging. Market makers who hold large positions at nearby strikes adjust their stock hedges as expiry approaches, and when they are long gamma that buying and selling can hold price near heavily traded strikes, an effect called pinning. See dealer hedging and gamma exposure.
How to read it
- One expiry at a time. Max pain belongs to a single expiry. Pooling open interest across expiries produces a number with no clear meaning.
- Closer to expiry, more relevant. Any pull toward max pain, if it appears at all, is usually strongest in the final days before expiry, when gamma near the money is highest.
- Size of the expiry. The monthly expiry, the third Friday, usually carries the most open interest. A weekly expiry with thin open interest says little.
- Distance from price. Max pain far from the current price shows how positioning is spread, not where the stock is heading.
- Gamma regime. Pinning is more plausible when dealer gamma is positive and moves are being damped; when it is negative, moves tend to extend instead.
Worked example (illustrative numbers)
Illustrative numbers only, not a recommendation. A stock trades at $102 with four strikes open for Friday's expiry.
| Strike | Call open interest | Put open interest |
|---|---|---|
| $95 | 1,000 | 4,000 |
| $100 | 3,000 | 5,000 |
| $105 | 5,000 | 2,000 |
| $110 | 4,000 | 500 |
Total value of all open options at each possible close:
- At $95: puts at $100, $105 and $110 pay 25,000 + 20,000 + 7,500 = 52,500, or $5.25 million.
- At $100: the $95 calls pay 5,000; the $105 and $110 puts pay 10,000 + 5,000; total 20,000, or $2.0 million.
- At $105: the calls pay 10,000 + 15,000 and the $110 puts 2,500; total 27,500, or $2.75 million.
- At $110: the calls pay 15,000 + 30,000 + 25,000 = 70,000, or $7.0 million.
Max pain is $100, two dollars below the current price. A trader might note that a drift toward $100 into Friday would be consistent with pinning, while an earnings report or a market-wide move could easily override it. That is a scenario, not a forecast.
Limitations and common mistakes
- It is not a price target. Studies of stock prices around expiry have found some clustering near strikes, but the effect is modest and inconsistent. News, earnings and index flows dominate it.
- Positioning is unknown. Open interest shows how many contracts are open, not who is long or short. The story that sellers "want" price at max pain assumes a positioning that may not exist.
- Open interest updates once a day. Max pain can shift overnight as contracts are opened and closed.
- Not the same as a wall. An options wall is the single strike with the most call or put open interest; max pain weighs every strike at once. The two often sit close together but answer different questions.
- Thin chains mislead. In stocks with little options activity, a few hundred contracts can set max pain.
For background on the input itself, see open interest.
In Clear Tape
On the Options page, the free SPY, QQQ and IWM cards show max pain for the nearest expiry, next to the call wall, put wall, gamma flip and put/call open interest ratio. Pro members can analyze any stock with listed options: max pain appears with the gamma flip and walls in the What it means panel and is marked on the open interest by strike chart. Choosing an expiration shows that expiry's max pain; with All expirations selected, Clear Tape uses the nearest expiry, because pooled max pain has no clear meaning. Members see each session's closing data once the next session has opened, not live quotes. Plan details are on the pricing page.
For educational purposes only. Not investment advice.