OITracker Cboe delayed data

Contract OI history

Back to TOST

Jan 21, 2028 EXPIRATION

TOST $35.00 Call

TOST280121C00035000

Latest saved OI2,526Oct 23, 2026
Last change+76vs 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. 2,5261,2630 2026-10-02: 1,494 OI2026-10-05: 1,497 OI2026-10-06: 1,490 OI2026-10-07: 1,490 OI2026-10-08: 1,490 OI2026-10-09: 1,459 OI2026-10-13: 1,820 OI2026-10-14: 1,820 OI2026-10-15: 2,317 OI2026-10-16: 2,317 OI2026-10-21: 2,450 OI2026-10-23: 2,526 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, 20262,526+76
Oct 21, 2026Viewing2,450+133
Oct 16, 20262,3170
Oct 15, 20262,317+497
Oct 14, 20261,8200
Oct 13, 20261,820+361
Oct 09, 20261,459-31
Oct 08, 20261,4900
Oct 07, 20261,4900
Oct 06, 20261,490-7
Oct 05, 20261,497+3
Oct 02, 20261,494No prior observation