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Contract OI history

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Jan 21, 2028 EXPIRATION

O $40.00 Put

O280121P00040000

Latest saved OI192Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
O $40.00 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. 192960 2026-10-02: 132 OI2026-10-05: 171 OI2026-10-06: 171 OI2026-10-07: 171 OI2026-10-08: 176 OI2026-10-09: 191 OI2026-10-13: 190 OI2026-10-14: 190 OI2026-10-15: 191 OI2026-10-16: 192 OI2026-10-21: 192 OI2026-10-23: 192 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, 2026Viewing1920
Oct 21, 20261920
Oct 16, 2026192+1
Oct 15, 2026191+1
Oct 14, 20261900
Oct 13, 2026190-1
Oct 09, 2026191+15
Oct 08, 2026176+5
Oct 07, 20261710
Oct 06, 20261710
Oct 05, 2026171+39
Oct 02, 2026132No prior observation