OITracker Cboe delayed data

Contract OI history

Back to B

Mar 19, 2027 EXPIRATION

B $50.00 Put

B270319P00050000

Latest saved OI1,021Oct 23, 2026
Last change+19vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $50.00 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. 1,0215100 2026-10-02: 951 OI2026-10-05: 949 OI2026-10-06: 949 OI2026-10-07: 949 OI2026-10-08: 963 OI2026-10-09: 965 OI2026-10-13: 965 OI2026-10-14: 967 OI2026-10-15: 972 OI2026-10-16: 972 OI2026-10-21: 1,002 OI2026-10-23: 1,021 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, 2026Viewing1,021+19
Oct 21, 20261,002+30
Oct 16, 20269720
Oct 15, 2026972+5
Oct 14, 2026967+2
Oct 13, 20269650
Oct 09, 2026965+2
Oct 08, 2026963+14
Oct 07, 20269490
Oct 06, 20269490
Oct 05, 2026949-2
Oct 02, 2026951No prior observation