I keep seeing traders point at strikes with huge open interest and call them support or resistance, and there’s all the talk about price getting “pinned” to max pain into expiration. Is there a real mechanism behind that, or is it just chart astrology? I mostly trade liquid names and ETFs like QQQ and want to know when to take these levels seriously.
1 Answer
Large open interest can influence price, but through dealer hedging, not because the strikes themselves are magic. Market makers take the other side of customer option flow and hedge in the underlying to stay delta-neutral, so what matters is their aggregate gamma. When dealers are net long gamma, they buy dips and sell rallies to rehedge, which dampens moves and can pull price toward heavily owned strikes as expiration nears. That is the pinning effect, and it is strongest for single stocks with share settlement and concentrated open interest at a nearby round strike. When dealers are net short gamma, the same hedging runs in reverse: they buy strength and sell weakness, accelerating moves through levels instead of holding them.
Max pain, the strike where the most total option value expires worthless, is a related folk indicator. Price sometimes drifts toward it into expiration, but the evidence is weak and easily overwhelmed.
The limits matter, especially for your case. You cannot directly observe dealer positioning; retail gamma estimates only guess which side the dealer holds. Pinning concentrates in the final day or two and barely touches cash-settled index options. Note that ETFs like QQQ settle into shares, not cash, so the mechanism technically applies, but QQQ is so large, liquid, and arbitraged against its basket and futures that reliable pinning is rare. Any catalyst, like earnings or a macro print, erases it. Treat concentrated strikes as areas where hedging flow may cluster, not as guaranteed floors or ceilings.
SML NewsAugust 30, 2026Sign in to answer this question.
