Gamma exposure describes how options positioning can translate into changing hedge requirements as SPX moves. It provides context around potential hedging pressure rather than a direct forecast of market direction.
Dealers with positive gamma generally hedge by selling as price rises and buying as price falls, potentially dampening movement. Dealers with negative gamma generally hedge by buying as price rises and selling as price falls, potentially reinforcing movement. The resulting market impact also depends on actual positioning, other flows, and available liquidity.
The sign identifies whether the measured net gamma exposure is positive or negative, while the magnitude describes its size. Raw GEX uses zero as its reference point. Reading both sign and magnitude helps distinguish the exposure condition from its scale.
No. Positive GEX does not automatically predict a rally, and negative GEX does not automatically predict a decline. Gamma exposure describes how hedge requirements may respond to price changes. It should be interpreted alongside directional flow, volatility, and price behavior.
Market State GEX, or MS GEX, is SPX Gamma’s proprietary measurement that places raw gamma exposure in historical context within its assessment window. Raw GEX measures exposure relative to zero, while MS GEX evaluates its relative strength against the conditions used for comparison.
Yes. Raw exposure can remain above zero while being comparatively weak against its historical reference. A positive raw GEX reading and a negative MS GEX reading therefore describe different aspects of the same environment rather than contradicting each other.
Reading the two measurements together helps distinguish the current exposure level from its relative strength. SPX Gamma combines them with volatility and other evidence to characterize the broader market environment and inform its trading programs and strategies.