OITracker Cboe delayed data

Contract OI history

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Oct 23, 2026 EXPIRATION

TOST $30.00 Put

TOST261023P00030000

Latest saved OI2,485Oct 23, 2026
Last change-13vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $30.00 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. 2,4981,2490 2026-10-02: 23 OI2026-10-05: 25 OI2026-10-06: 25 OI2026-10-07: 25 OI2026-10-08: 25 OI2026-10-09: 2,376 OI2026-10-13: 2,383 OI2026-10-14: 2,383 OI2026-10-15: 2,408 OI2026-10-16: 2,401 OI2026-10-21: 2,498 OI2026-10-23: 2,485 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, 2026Viewing2,485-13
Oct 21, 20262,498+97
Oct 16, 20262,401-7
Oct 15, 20262,408+25
Oct 14, 20262,3830
Oct 13, 20262,383+7
Oct 09, 20262,376+2,351
Oct 08, 2026250
Oct 07, 2026250
Oct 06, 2026250
Oct 05, 202625+2
Oct 02, 202623No prior observation