MCO open interest by strike
From the closing options book · October 20, 2026 · updated after every close
At the October 20, 2026 close, MCO options within 45 days held 3,176 calls and 1,582 puts in open interest, a put/call ratio of 0.5. The biggest call strike near the money was 490 and the biggest put strike 470.
MCO open interest by strike, within 5% of the close
490 carried 1,116 calls and 470 carried 74 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 MCO pages.
These are the October 20, 2026 closing numbers. Members see MCO's map move live all session.
Common questions
3,176 calls and 1,582 puts within 45 days at the October 20, 2026 close.
490 near the money, with 1,116 contracts.
470 near the money, with 74 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.