OITracker Cboe delayed data

Contract OI history

Back to TOST

Jan 21, 2028 EXPIRATION

TOST $23.00 Put

TOST280121P00023000

Latest saved OI791Oct 23, 2026
Last change+131vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $23.00 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. 7913950 2026-10-02: 662 OI2026-10-05: 662 OI2026-10-06: 662 OI2026-10-07: 662 OI2026-10-08: 662 OI2026-10-09: 659 OI2026-10-13: 659 OI2026-10-14: 659 OI2026-10-15: 659 OI2026-10-16: 660 OI2026-10-21: 660 OI2026-10-23: 791 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, 2026791+131
Oct 21, 2026Viewing6600
Oct 16, 2026660+1
Oct 15, 20266590
Oct 14, 20266590
Oct 13, 20266590
Oct 09, 2026659-3
Oct 08, 20266620
Oct 07, 20266620
Oct 06, 20266620
Oct 05, 20266620
Oct 02, 2026662No prior observation