OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

TOST $35.00 Call

TOST270115C00035000

Latest saved OI15,717Oct 23, 2026
Last change+3vs 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. 18,1339,0660 2026-10-02: 18,133 OI2026-10-05: 18,123 OI2026-10-06: 18,124 OI2026-10-07: 18,121 OI2026-10-08: 18,121 OI2026-10-09: 15,105 OI2026-10-13: 15,125 OI2026-10-14: 15,125 OI2026-10-15: 15,138 OI2026-10-16: 15,155 OI2026-10-21: 15,714 OI2026-10-23: 15,717 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, 202615,717+3
Oct 21, 2026Viewing15,714+559
Oct 16, 202615,155+17
Oct 15, 202615,138+13
Oct 14, 202615,1250
Oct 13, 202615,125+20
Oct 09, 202615,105-3,016
Oct 08, 202618,1210
Oct 07, 202618,121-3
Oct 06, 202618,124+1
Oct 05, 202618,123-10
Oct 02, 202618,133No prior observation