Max Pain
The strike price where option buyers collectively suffer the greatest loss at expiry — a key gravitational level watched on every NSE expiry day.
Definition
Max pain — sometimes called the options pain point — is the single strike price at which the combined intrinsic value of all in-the-money calls and puts outstanding at expiry is at its absolute minimum. Because option buyers receive intrinsic value only on contracts that finish in-the-money, the max pain strike is simultaneously the level where option writers (sellers) retain the maximum proportion of the premiums they collected. It is derived from the open interest across every listed strike price for a given contract's expiry.
Why it matters
The max pain theory posits that large institutional option writers — who hold significant short positions in both calls and puts — have an economic incentive for the underlying to settle near the max pain strike at expiry, because that is where their collected premiums are most fully retained. Whether or not one accepts that premise, the practical relevance of max pain on NSE is well documented by traders: Nifty and Bank Nifty frequently exhibit a drift toward the max pain level in the final 30–60 minutes of weekly expiry sessions every Thursday. This makes max pain a useful reference point alongside put-call ratio, OI buildup, and gamma exposure when interpreting late-session price action. It should never be used as a mechanical trade signal in isolation — its predictive value degrades when a strong directional catalyst (macro news, RBI policy, global triggers) overrides the gravity.
Formula
For each candidate strike Sk, compute the total pain value:
Pain(Sk) = Σ OIcall,i × max(Sk − Si, 0) + Σ OIput,j × max(Sj − Sk, 0)
where Si are call strikes and Sj are put strikes, and OI is the open interest in lots at each strike. The max pain level is the Sk that minimises Pain(Sk). This calculation is updated in real time as open interest shifts during the session; the result can migrate by one or two strikes intraday as traders close or add positions.
Example
Suppose Nifty is trading around 24,000 on a Thursday morning with weekly expiry later that day. After summing the intrinsic payouts across every listed call and put strike weighted by their outstanding open interest, the pain curve reaches its trough at 23,900. This is the max pain level. If the current spot of 24,000 is 100 points above max pain, experienced traders observe whether the index begins drifting lower toward 23,900 in the final hour — a move that would render most OTM calls worthless and benefit the net short-options position held by institutions. If instead a strong catalyst pushes Nifty to 24,300, max pain is simply overridden and the level becomes irrelevant for that expiry. The key discipline is to treat max pain as one data point in a larger expiry-day framework, not as a guaranteed settlement target.
See live max pain on every expiry
TradePulse calculates and displays the real-time max pain level for Nifty and Bank Nifty so you can track the gravitational pull as expiry approaches.