COST open interest by strike
From the closing options book · October 20, 2026 · updated after every close
At the October 20, 2026 close, COST options within 45 days held 42,443 calls and 42,457 puts in open interest, a put/call ratio of 1. The biggest call strike near the money was 1040 and the biggest put strike 960.
COST open interest by strike, within 5% of the close
1040 carried 3,172 calls and 960 carried 1,344 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 COST pages.
These are the October 20, 2026 closing numbers. Members see COST's map move live all session.
Common questions
42,443 calls and 42,457 puts within 45 days at the October 20, 2026 close.
1040 near the money, with 3,172 contracts.
960 near the money, with 1,344 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.