OITracker Cboe delayed data

Contract OI history

Back to TOST

Jan 21, 2028 EXPIRATION

TOST $33.00 Put

TOST280121P00033000

Latest saved OI2,376Oct 23, 2026
Last change+2,063vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $33.00 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. 2,3761,1880 2026-10-02: 244 OI2026-10-05: 244 OI2026-10-06: 244 OI2026-10-07: 244 OI2026-10-08: 244 OI2026-10-09: 244 OI2026-10-13: 244 OI2026-10-14: 244 OI2026-10-15: 313 OI2026-10-16: 313 OI2026-10-21: 313 OI2026-10-23: 2,376 OI Oct 02, 2026Oct 23, 2026

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

TOST contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20262,376+2,063
Oct 21, 2026Viewing3130
Oct 16, 20263130
Oct 15, 2026313+69
Oct 14, 20262440
Oct 13, 20262440
Oct 09, 20262440
Oct 08, 20262440
Oct 07, 20262440
Oct 06, 20262440
Oct 05, 20262440
Oct 02, 2026244No prior observation