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Contract OI history

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Mar 19, 2027 EXPIRATION

MA $400.00 Put

MA270319P00400000

Latest saved OI169Oct 23, 2026
Last change-15vs 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. 185920 2026-10-02: 185 OI2026-10-05: 185 OI2026-10-06: 185 OI2026-10-07: 185 OI2026-10-08: 185 OI2026-10-09: 185 OI2026-10-13: 184 OI2026-10-14: 184 OI2026-10-15: 184 OI2026-10-16: 184 OI2026-10-21: 184 OI2026-10-23: 169 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, 2026Viewing169-15
Oct 21, 20261840
Oct 16, 20261840
Oct 15, 20261840
Oct 14, 20261840
Oct 13, 2026184-1
Oct 09, 20261850
Oct 08, 20261850
Oct 07, 20261850
Oct 06, 20261850
Oct 05, 20261850
Oct 02, 2026185No prior observation