OITracker Cboe delayed data

Contract OI history

Back to B

Jan 21, 2028 EXPIRATION

B $20.00 Put

B280121P00020000

Latest saved OI439Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $20.00 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. 5292640 2026-10-02: 529 OI2026-10-05: 529 OI2026-10-06: 529 OI2026-10-07: 429 OI2026-10-08: 439 OI2026-10-09: 439 OI2026-10-13: 439 OI2026-10-14: 439 OI2026-10-15: 439 OI2026-10-16: 439 OI2026-10-21: 439 OI2026-10-23: 439 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, 2026Viewing4390
Oct 21, 20264390
Oct 16, 20264390
Oct 15, 20264390
Oct 14, 20264390
Oct 13, 20264390
Oct 09, 20264390
Oct 08, 2026439+10
Oct 07, 2026429-100
Oct 06, 20265290
Oct 05, 20265290
Oct 02, 2026529No prior observation