OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

B $42.00 Put

B261120P00042000

Latest saved OI201Oct 23, 2026
Last change-34vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $42.00 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. 2531260 2026-10-02: 237 OI2026-10-05: 237 OI2026-10-06: 237 OI2026-10-07: 236 OI2026-10-08: 236 OI2026-10-09: 240 OI2026-10-13: 243 OI2026-10-14: 253 OI2026-10-15: 245 OI2026-10-16: 246 OI2026-10-21: 235 OI2026-10-23: 201 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, 2026Viewing201-34
Oct 21, 2026235-11
Oct 16, 2026246+1
Oct 15, 2026245-8
Oct 14, 2026253+10
Oct 13, 2026243+3
Oct 09, 2026240+4
Oct 08, 20262360
Oct 07, 2026236-1
Oct 06, 20262370
Oct 05, 20262370
Oct 02, 2026237No prior observation