OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

TOST $33.00 Put

TOST261218P00033000

Latest saved OI316Oct 23, 2026
Last change+18vs 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. 3181590 2026-10-02: 314 OI2026-10-05: 314 OI2026-10-06: 314 OI2026-10-07: 314 OI2026-10-08: 314 OI2026-10-09: 315 OI2026-10-13: 315 OI2026-10-14: 315 OI2026-10-15: 315 OI2026-10-16: 318 OI2026-10-21: 298 OI2026-10-23: 316 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, 2026316+18
Oct 21, 2026Viewing298-20
Oct 16, 2026318+3
Oct 15, 20263150
Oct 14, 20263150
Oct 13, 20263150
Oct 09, 2026315+1
Oct 08, 20263140
Oct 07, 20263140
Oct 06, 20263140
Oct 05, 20263140
Oct 02, 2026314No prior observation