OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

TOST $35.00 Call

TOST261218C00035000

Latest saved OI8,757Oct 23, 2026
Last change+7,079vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $35.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 8,7574,3780 2026-10-02: 1,554 OI2026-10-05: 1,629 OI2026-10-06: 1,630 OI2026-10-07: 1,635 OI2026-10-08: 1,635 OI2026-10-09: 1,635 OI2026-10-13: 1,639 OI2026-10-14: 1,639 OI2026-10-15: 1,639 OI2026-10-16: 1,673 OI2026-10-21: 1,678 OI2026-10-23: 8,757 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, 20268,757+7,079
Oct 21, 2026Viewing1,678+5
Oct 16, 20261,673+34
Oct 15, 20261,6390
Oct 14, 20261,6390
Oct 13, 20261,639+4
Oct 09, 20261,6350
Oct 08, 20261,6350
Oct 07, 20261,635+5
Oct 06, 20261,630+1
Oct 05, 20261,629+75
Oct 02, 20261,554No prior observation