SPY open interest by strike
From the closing options book · October 20, 2026 · updated after every close
At the October 20, 2026 close, SPY options within 45 days held 553,131 calls and 882,770 puts in open interest, a put/call ratio of 1.6. The biggest call strike near the money was 790 and the biggest put strike 745.
SPY open interest by strike, within 5% of the close
790 carried 44,712 calls and 745 carried 45,545 puts.
Open interest counts contracts still open after the close; it settles overnight. Large strikes are where dealer hedging is concentrated, which is why open interest feeds the gamma levels and max pain on the other SPY pages.
These are the October 20, 2026 closing numbers. Members see SPY's map move live all session.
Common questions
553,131 calls and 882,770 puts within 45 days at the October 20, 2026 close.
790 near the money, with 44,712 contracts.
745 near the money, with 45,545 contracts.
Compare: open interest by strike on other tickers
Measured from the closing options book and rebuilt after every close. Nothing on this page is live. Levels are where dealer hedging is concentrated, not targets or forecasts. Not investment advice.