What is net gamma exposure (net GEX)?

Reading the sign

Positive net GEX is a stabilising market: dealer hedging leans against moves, realised volatility tends to be low and price coils between the walls. Negative net GEX is a destabilising market: hedging feeds the move, ranges expand and trends run. The flip between the two happens at the zero-gamma level.

Because it collapses the whole chain into one figure, net GEX is the fastest read on the day's expected character before you look at any individual strike.

Reading the size

A large positive total implies strong pinning and a quiet, range-bound tape; a large negative total implies fragile, trend-prone conditions where a catalyst can travel a long way. A total near zero says the market is balanced on the regime line and can tip either way — the situation to watch most closely.

Net GEX also changes as expiries roll off. A big positive total that collapses after a major expiry can hand the market back to volatility, which is why the days around large expirations often feel different.

How traders use it

Net GEX is best used as context, not a trigger: it sets the expectation (fade extremes vs respect momentum) that the walls and the flip then make actionable at specific prices. Watching it trend across days shows the market drifting toward or away from fragility.

FAQ

What is net GEX?

Net GEX is the sum of dealer gamma across the entire options chain for a ticker; its sign shows whether dealer hedging will dampen or amplify moves.

Is positive or negative net gamma better?

Neither is 'better' — positive net gamma means calmer, range-bound conditions, negative means faster, trendier ones. Which you prefer depends on your strategy.

How is net GEX different from the walls?

Net GEX is one aggregate number for the whole chain; the call wall and put wall are the specific strikes where that gamma is most concentrated.