Max Pain

Max Pain is calculated by working through every strike in an option chain and asking: if the underlying settled exactly at this strike on expiry date, what would total payouts to call and put buyers add up to across all strikes? The strike where that combined payout is lowest is the max pain point. Because option writing is largely dominated by well-capitalised participants, the theory holds that price tends to gravitate toward the strike that minimises the value option writers must pay out, in effect, the strike that inflicts maximum pain on the broadest set of option buyers.

Retail F&O traders on the NSE most commonly track max pain for Nifty 50 and Bank Nifty weekly and monthly contracts, since these have the deepest open interest and the cleanest max pain signal. It is usually recalculated through the day as fresh strike price positions get added or unwound, so the max pain level itself can shift, particularly in the final one or two trading sessions before expiry, when it tends to stabilise as positions get less likely to be rolled or squared off drastically.

Max pain is a statistical tendency, not a guarantee, and traders who treat it as gospel are often disappointed on days with strong directional news, heavy FII flows, or events like RBI policy and Union Budget announcements. It also says nothing about intraday volatility, price can swing well away from the max pain strike during the day and only revert close to expiry, if at all. It works best as one input alongside other tools, and is closely related to two other concepts: the Max Pain Gravity Effect, which describes the price drift toward this specific strike, and Option Pinning, the broader tendency of price to stick near any heavily-open-interest strike.