OITracker Cboe delayed data

Contract OI history

Back to TOST

Dec 18, 2026 EXPIRATION

TOST $26.00 Put

TOST261218P00026000

Latest saved OI1,074Oct 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 $26.00 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. 1,0925460 2026-10-02: 1,082 OI2026-10-05: 1,082 OI2026-10-06: 1,082 OI2026-10-07: 1,082 OI2026-10-08: 1,082 OI2026-10-09: 1,082 OI2026-10-13: 1,082 OI2026-10-14: 1,082 OI2026-10-15: 1,087 OI2026-10-16: 1,092 OI2026-10-21: 1,074 OI2026-10-23: 1,074 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, 2026Viewing1,0740
Oct 21, 20261,074-18
Oct 16, 20261,092+5
Oct 15, 20261,087+5
Oct 14, 20261,0820
Oct 13, 20261,0820
Oct 09, 20261,0820
Oct 08, 20261,0820
Oct 07, 20261,0820
Oct 06, 20261,0820
Oct 05, 20261,0820
Oct 02, 20261,082No prior observation