OITracker Cboe delayed data

Contract OI history

Back to BAND

May 21, 2027 EXPIRATION

BAND $40.00 Put

BAND270521P00040000

Latest saved OI100Oct 20, 2026
Last change+15vs previous saved observation
Saved market days5Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
BAND $40.00 put open interest history 5 saved observations from 2026-10-09 to 2026-10-20. Exact values and changes are listed in the table below. 100500 2026-10-09: 10 OI2026-10-13: 32 OI2026-10-14: 85 OI2026-10-16: 85 OI2026-10-20: 100 OI Oct 09, 2026Oct 20, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

BAND contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 20, 2026Viewing100+15
Oct 16, 2026850
Oct 14, 202685+53
Oct 13, 202632+22
Oct 09, 202610No prior observation