OITracker Cboe delayed data

Contract OI history

Back to STM

Jan 21, 2028 EXPIRATION

STM $27.00 Put

STM280121P00027000

Latest saved OI3,730Oct 23, 2026
Last change+2vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
STM $27.00 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. 3,7301,8650 2026-10-02: 3,723 OI2026-10-05: 3,723 OI2026-10-06: 3,723 OI2026-10-07: 3,723 OI2026-10-08: 3,723 OI2026-10-09: 3,728 OI2026-10-13: 3,728 OI2026-10-14: 3,728 OI2026-10-15: 3,728 OI2026-10-16: 3,728 OI2026-10-21: 3,728 OI2026-10-23: 3,730 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, 20263,730+2
Oct 21, 2026Viewing3,7280
Oct 16, 20263,7280
Oct 15, 20263,7280
Oct 14, 20263,7280
Oct 13, 20263,7280
Oct 09, 20263,728+5
Oct 08, 20263,7230
Oct 07, 20263,7230
Oct 06, 20263,7230
Oct 05, 20263,7230
Oct 02, 20263,723No prior observation