Positive vs Negative Gamma
Dealer gamma exposure sits in one of two regimes, and which one is active changes how the options market absorbs or magnifies price movement. This page explains positive gamma and negative gamma: what each regime is, the hedging mechanics behind it, and how the two are separated by the gamma flip. It is descriptive market-structure context, not a signal or a forecast.
This page explains the concept. It shows no live numbers — the live map lives in the indicator, on TradingView and ATAS. Educational context only, not a signal.
What positive and negative gamma mean
Gamma measures how a dealer's directional exposure, its delta, changes as the underlying moves. Because market makers take the other side of customer options flow and aim to stay directionally neutral, they continuously re-hedge in the underlying. Whether their aggregate book is net long gamma (positive) or net short gamma (negative) sets the direction of that re-hedging, and that single fact defines the gamma regime the market is in.
In a positive gamma regime, dealers hedge counter-trend: they sell into rallies and buy into declines to hold neutral. That flow leans against price and tends to dampen volatility, which is why positive-gamma sessions often show mean-reversion and tighter ranges around heavily traded strikes. In a negative gamma regime the hedging flips: dealers buy as price rises and sell as it falls, hedging with the trend. That flow leans with price and tends to amplify volatility, so moves can extend further and faster once they begin. Positive versus negative gamma is, at bottom, this difference in which way the hedge pushes.
Why the regime matters
Knowing which regime is active frames how a level is likely to behave rather than predicting where price will go. The same strike concentration reads differently depending on the backdrop: under positive gamma, dealer flow tends to reinforce a level as a place price is drawn back toward; under negative gamma that stabilizing cushion is absent, so the same area offers less resistance to a move passing through. The regime is the context in which every other GEX level is read.
GEX Levels surfaces this regime as part of the picture it draws from the live options chain. The gamma flip, also called the zero-gamma or vol trigger level, marks where net dealer gamma crosses zero and the regime changes, and the live context panel summarizes the current state through a gamma-by-delta quadrant alongside a Fear score. Because the reading comes from a positioning snapshot, it goes stale as the chain shifts through the session and around expiration, which is why the indicator refreshes the levels each session. None of it is a directive to act.
Common misconceptions
A regime describes how hedging is likely to interact with movement, not which way price will move. Positive gamma is not bullish and negative gamma is not bearish; either can accompany an up day or a down day.
The regime is derived from current positioning, so it can change intraday as open interest shifts and, especially, as large expirations roll off. The flip level and the regime around it move with the chain.
Counter-trend dealer hedging can be overwhelmed by macro news, liquidity gaps, or large directional flow. Positive gamma lowers the odds of a violent move at the margin; it does not prevent one, and trading carries substantial risk of loss.
Questions traders ask.
What is the difference between positive and negative gamma?
Positive (long) gamma means dealer hedging runs counter to price, selling strength and buying weakness, which tends to dampen volatility. Negative (short) gamma means hedging runs with price, buying strength and selling weakness, which tends to amplify it. The two are opposite hedging behaviors.
Is negative gamma bearish?
No. Negative gamma describes amplified, trend-extending volatility, not direction. A short-gamma environment can magnify a rally just as easily as a sell-off, and says nothing about which way price will resolve.
What separates the two gamma regimes?
The gamma flip: the level where aggregate dealer gamma crosses from positive to negative. Above it the market is typically in positive gamma; below it, negative. That boundary is not fixed and moves as positioning changes through the session and around expiration.
Does the gamma regime predict the day's move?
No. It is descriptive context about how dealer hedging may interact with movement, not a forecast or a trade signal. Levels are a snapshot of positioning that goes stale as the chain changes, and trading always involves risk of loss.
Is this a buy or sell signal?
No. Everything on this page describes option-market structure — where dealer hedging concentrates — which is context on how a session is likely to behave, not a recommendation to buy or sell and not a prediction of direction. Educational and informational only; trading involves substantial risk of loss.
Where do the live levels come from?
The GEX Levels indicator computes them from the live options chain and draws them on your TradingView or ATAS chart, refreshed each session. This page explains the concept; the live map lives in the indicator, and the free Morning Map shows the prior session's index levels each day.
See it on your chart.
The concept is free to read. The live levels — call wall, put wall, gamma flip, the second-order greeks, the regime and more, refreshed every session — are built into the GEX Levels indicator for TradingView and ATAS. The free Morning Map shows the prior session's index levels each day.
Related: The Gamma Flip, Explained · Gamma levels: the map of dealer positioning · The GEX profile: net dealer gamma by strike · What is GEX · Levels by ticker