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Contract OI history

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Dec 18, 2026 EXPIRATION

MA $400.00 Put

MA261218P00400000

Latest saved OI368Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MA $400.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 3701850 2026-10-02: 370 OI2026-10-05: 370 OI2026-10-06: 370 OI2026-10-07: 370 OI2026-10-08: 370 OI2026-10-09: 368 OI2026-10-13: 368 OI2026-10-14: 368 OI2026-10-15: 368 OI2026-10-16: 368 OI2026-10-21: 368 OI2026-10-23: 368 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

MA contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing3680
Oct 21, 20263680
Oct 16, 20263680
Oct 15, 20263680
Oct 14, 20263680
Oct 13, 20263680
Oct 09, 2026368-2
Oct 08, 20263700
Oct 07, 20263700
Oct 06, 20263700
Oct 05, 20263700
Oct 02, 2026370No prior observation