OITracker Cboe delayed data

Contract OI history

Back to B

Sep 17, 2027 EXPIRATION

B $30.00 Put

B270917P00030000

Latest saved OI175Oct 23, 2026
Last change+3vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $30.00 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. 175870 2026-10-02: 131 OI2026-10-05: 141 OI2026-10-06: 141 OI2026-10-07: 166 OI2026-10-08: 169 OI2026-10-09: 169 OI2026-10-13: 169 OI2026-10-14: 170 OI2026-10-15: 173 OI2026-10-16: 173 OI2026-10-21: 172 OI2026-10-23: 175 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, 2026Viewing175+3
Oct 21, 2026172-1
Oct 16, 20261730
Oct 15, 2026173+3
Oct 14, 2026170+1
Oct 13, 20261690
Oct 09, 20261690
Oct 08, 2026169+3
Oct 07, 2026166+25
Oct 06, 20261410
Oct 05, 2026141+10
Oct 02, 2026131No prior observation