OITracker Cboe delayed data

Contract OI history

Back to STM

Nov 20, 2026 EXPIRATION

STM $55.00 Put

STM261120P00055000

Latest saved OI1,540Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
STM $55.00 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. 1,5517750 2026-10-02: 1,313 OI2026-10-05: 1,459 OI2026-10-06: 1,478 OI2026-10-07: 1,482 OI2026-10-08: 1,482 OI2026-10-09: 1,541 OI2026-10-13: 1,551 OI2026-10-14: 1,551 OI2026-10-15: 1,545 OI2026-10-16: 1,545 OI2026-10-21: 1,540 OI2026-10-23: 1,540 OI Oct 02, 2026Oct 23, 2026

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

STM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20261,5400
Oct 21, 2026Viewing1,540-5
Oct 16, 20261,5450
Oct 15, 20261,545-6
Oct 14, 20261,5510
Oct 13, 20261,551+10
Oct 09, 20261,541+59
Oct 08, 20261,4820
Oct 07, 20261,482+4
Oct 06, 20261,478+19
Oct 05, 20261,459+146
Oct 02, 20261,313No prior observation