OITracker Cboe delayed data

Contract OI history

Back to TOST

Jan 21, 2028 EXPIRATION

TOST $37.00 Put

TOST280121P00037000

Latest saved OI571Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $37.00 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. 5712850 2026-10-02: 281 OI2026-10-05: 281 OI2026-10-06: 281 OI2026-10-07: 281 OI2026-10-08: 281 OI2026-10-09: 281 OI2026-10-13: 281 OI2026-10-14: 281 OI2026-10-15: 571 OI2026-10-16: 571 OI2026-10-21: 571 OI2026-10-23: 571 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, 2026Viewing5710
Oct 21, 20265710
Oct 16, 20265710
Oct 15, 2026571+290
Oct 14, 20262810
Oct 13, 20262810
Oct 09, 20262810
Oct 08, 20262810
Oct 07, 20262810
Oct 06, 20262810
Oct 05, 20262810
Oct 02, 2026281No prior observation