OITracker Cboe delayed data

Contract OI history

Back to USB

Dec 18, 2026 EXPIRATION

USB $40.00 Put

USB261218P00040000

Latest saved OI491Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
USB $40.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 5152570 2026-10-02: 515 OI2026-10-05: 515 OI2026-10-06: 515 OI2026-10-07: 515 OI2026-10-08: 492 OI2026-10-09: 492 OI2026-10-14: 492 OI2026-10-15: 492 OI2026-10-16: 491 OI2026-10-21: 491 OI2026-10-23: 491 OI Oct 02, 2026Oct 23, 2026

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

USB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20264910
Oct 21, 2026Viewing4910
Oct 16, 2026491-1
Oct 15, 20264920
Oct 14, 20264920
Oct 09, 20264920
Oct 08, 2026492-23
Oct 07, 20265150
Oct 06, 20265150
Oct 05, 20265150
Oct 02, 2026515No prior observation