CLS open interest by strike
From the closing options book · October 20, 2026 · updated after every close
At the October 20, 2026 close, CLS options within 45 days held 11,574 calls and 16,418 puts in open interest, a put/call ratio of 1.42. The biggest call strike near the money was 310 and the biggest put strike 300.
CLS open interest by strike, within 5% of the close
310 carried 1,995 calls and 300 carried 2,094 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 CLS pages.
These are the October 20, 2026 closing numbers. Members see CLS's map move live all session.
Common questions
11,574 calls and 16,418 puts within 45 days at the October 20, 2026 close.
310 near the money, with 1,995 contracts.
300 near the money, with 2,094 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.