OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

B $41.00 Put

B261120P00041000

Latest saved OI544Oct 23, 2026
Last change+54vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $41.00 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. 5442720 2026-10-02: 120 OI2026-10-05: 123 OI2026-10-06: 123 OI2026-10-07: 135 OI2026-10-08: 135 OI2026-10-09: 135 OI2026-10-13: 251 OI2026-10-14: 266 OI2026-10-15: 268 OI2026-10-16: 311 OI2026-10-21: 490 OI2026-10-23: 544 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, 2026Viewing544+54
Oct 21, 2026490+179
Oct 16, 2026311+43
Oct 15, 2026268+2
Oct 14, 2026266+15
Oct 13, 2026251+116
Oct 09, 20261350
Oct 08, 20261350
Oct 07, 2026135+12
Oct 06, 20261230
Oct 05, 2026123+3
Oct 02, 2026120No prior observation