What is the index Concentration Table? The Index Concentration Table enables you to see many key metrics across the current complex at a glance, filtered by expiration date. This table helps answer when the most options impact will be exerted on upcoming stock movements. Specifically, the columns break out, by expiration, the calls, puts, gamma notional and delta notional value, and gamma notional and delta notional absolute value and you can get good insights from looking at specific dates. At SpotGamma, we tend to look for expirations which have more than 20pct of Deltas or Gammas expiring. In general, these can be turning points, where more puts are expiring can be a short term bottom and more calls expiring can be a short term market top. Together, with other charts and graphs across the Indices page, this chart helps paint a picture of when support and resistance exist and helps you manage your exposures. SpotGamma Subscribers can access this chart for the SPX, SPY, NDX, QQQ, RUT and IWM. Related articles What is the index Strike Table? What is the SpotGamma HIRO Indicator? What is the Equity Put/Call Ratio chart? What is the 5 Day & 30 Day Return Histogram? What is the Options Risk Reversal index chart?