OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

TOST $32.00 Put

TOST261218P00032000

Latest saved OI272Oct 23, 2026
Last change-5vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $32.00 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. 2771380 2026-10-02: 255 OI2026-10-05: 255 OI2026-10-06: 255 OI2026-10-07: 258 OI2026-10-08: 258 OI2026-10-09: 261 OI2026-10-13: 275 OI2026-10-14: 275 OI2026-10-15: 275 OI2026-10-16: 275 OI2026-10-21: 277 OI2026-10-23: 272 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, 2026272-5
Oct 21, 2026Viewing277+2
Oct 16, 20262750
Oct 15, 20262750
Oct 14, 20262750
Oct 13, 2026275+14
Oct 09, 2026261+3
Oct 08, 20262580
Oct 07, 2026258+3
Oct 06, 20262550
Oct 05, 20262550
Oct 02, 2026255No prior observation