MSTX open interest by strike
From the closing options book · October 20, 2026 · updated after every close
At the October 20, 2026 close, MSTX options within 45 days held 4,847 calls and 4,466 puts in open interest, a put/call ratio of 0.92. The biggest call strike near the money was 15 and the biggest put strike 15.
MSTX open interest by strike, within 5% of the close
15 carried 1,274 calls and 15 carried 1,939 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 MSTX pages.
These are the October 20, 2026 closing numbers. Members see MSTX's map move live all session.
Common questions
4,847 calls and 4,466 puts within 45 days at the October 20, 2026 close.
15 near the money, with 1,274 contracts.
15 near the money, with 1,939 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.