MSTU open interest by strike

From the closing options book · October 20, 2026 · updated after every close

At the October 20, 2026 close, MSTU options within 45 days held 2,548 calls and 2,020 puts in open interest, a put/call ratio of 0.79. The biggest call strike near the money was 33 and the biggest put strike 32.

2,548
Call OI
2,020
Put OI
0.79
Put/call OI
0.47
Put/call volume

MSTU open interest by strike, within 5% of the close

Strikeputs ← open interest → calls
34.5
34
33.5
33
32.5
32
31.5

33 carried 266 calls and 32 carried 91 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 MSTU pages.

These are the October 20, 2026 closing numbers. Members see MSTU's map move live all session.

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Common questions

What is MSTU's open interest?

2,548 calls and 2,020 puts within 45 days at the October 20, 2026 close.

Which MSTU strike has the most call open interest?

33 near the money, with 266 contracts.

Which MSTU strike has the most put open interest?

32 near the money, with 91 contracts.

Compare: open interest by strike on other tickers

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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.