On EquityHub, stocks have negative gamma. How is it possible that the market as a whole has positive gamma? The assumptions that we make about the way options are positioned are different for the SPX/SPY index products versus underlying stocks. SpotGramma Pro subscribers can access EquityHub here. Related articles How do I use EquityHub? Understanding EquityHub Scanners Can I access the original EquityHub? What are Dark Pools? How can I search for multiple tickers at a time on EquityHub?