S&P 500 Index ($SPX)
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[INDEX/CBOE]
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Gamma Exposure (GEX) also known as Gamma Levels, measures the change in delta exposure for options based on changes
in the underlying price. Gamma exposure highlights important price levels where there is significant gamma based on
market positioning and open interest. These elevated values reflect where market-makers may need to hedge to
mitigate their risk, offering important levels of support and resistance. By default, gamma exposure levels are
calculated on 4 nearby expirations, based on a 1% move of the underlying security using gamma and open interest.
Gamma exposure is calculated and updated throughout the day. Current gamma values, volume, and open interest can be
found in the Volatilities & Greeks page for the security. For more information, watch
this YouTube video. Gamma Exposure data is based on the consolidated OPRA feed.