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Contract OI history

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Jan 21, 2028 EXPIRATION

O $42.50 Put

O280121P00042500

Latest saved OI324Oct 23, 2026
Last change+10vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
O $42.50 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. 3241620 2026-10-02: 304 OI2026-10-05: 304 OI2026-10-06: 313 OI2026-10-07: 313 OI2026-10-08: 313 OI2026-10-09: 313 OI2026-10-13: 313 OI2026-10-14: 313 OI2026-10-15: 314 OI2026-10-16: 314 OI2026-10-21: 314 OI2026-10-23: 324 OI Oct 02, 2026Oct 23, 2026

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

O contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing324+10
Oct 21, 20263140
Oct 16, 20263140
Oct 15, 2026314+1
Oct 14, 20263130
Oct 13, 20263130
Oct 09, 20263130
Oct 08, 20263130
Oct 07, 20263130
Oct 06, 2026313+9
Oct 05, 20263040
Oct 02, 2026304No prior observation