OITracker Cboe delayed data

Contract OI history

Back to USB

Dec 18, 2026 EXPIRATION

USB $55.00 Put

USB261218P00055000

Latest saved OI1,334Oct 23, 2026
Last change+198vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
USB $55.00 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. 1,3346670 2026-10-02: 417 OI2026-10-05: 423 OI2026-10-06: 469 OI2026-10-07: 478 OI2026-10-08: 565 OI2026-10-09: 1,021 OI2026-10-14: 1,050 OI2026-10-15: 1,102 OI2026-10-16: 1,108 OI2026-10-21: 1,136 OI2026-10-23: 1,334 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, 20261,334+198
Oct 21, 2026Viewing1,136+28
Oct 16, 20261,108+6
Oct 15, 20261,102+52
Oct 14, 20261,050+29
Oct 09, 20261,021+456
Oct 08, 2026565+87
Oct 07, 2026478+9
Oct 06, 2026469+46
Oct 05, 2026423+6
Oct 02, 2026417No prior observation