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Contract OI history

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Nov 20, 2026 EXPIRATION

B $40.00 Put

B261120P00040000

Latest saved OI1,094Oct 23, 2026
Last change-7vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $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. 1,1015500 2026-10-02: 325 OI2026-10-05: 344 OI2026-10-06: 344 OI2026-10-07: 408 OI2026-10-08: 410 OI2026-10-09: 423 OI2026-10-13: 471 OI2026-10-14: 506 OI2026-10-15: 536 OI2026-10-16: 627 OI2026-10-21: 1,101 OI2026-10-23: 1,094 OI Oct 02, 2026Oct 23, 2026

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

B contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,094-7
Oct 21, 20261,101+474
Oct 16, 2026627+91
Oct 15, 2026536+30
Oct 14, 2026506+35
Oct 13, 2026471+48
Oct 09, 2026423+13
Oct 08, 2026410+2
Oct 07, 2026408+64
Oct 06, 20263440
Oct 05, 2026344+19
Oct 02, 2026325No prior observation