OITracker Cboe delayed data

Contract OI history

Back to B

Sep 17, 2027 EXPIRATION

B $35.00 Put

B270917P00035000

Latest saved OI247Oct 23, 2026
Last change+25vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $35.00 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. 2471230 2026-10-02: 136 OI2026-10-05: 137 OI2026-10-06: 137 OI2026-10-07: 138 OI2026-10-08: 138 OI2026-10-09: 139 OI2026-10-13: 151 OI2026-10-14: 165 OI2026-10-15: 193 OI2026-10-16: 200 OI2026-10-21: 222 OI2026-10-23: 247 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, 2026Viewing247+25
Oct 21, 2026222+22
Oct 16, 2026200+7
Oct 15, 2026193+28
Oct 14, 2026165+14
Oct 13, 2026151+12
Oct 09, 2026139+1
Oct 08, 20261380
Oct 07, 2026138+1
Oct 06, 20261370
Oct 05, 2026137+1
Oct 02, 2026136No prior observation