OITracker Cboe delayed data

Contract OI history

Back to TOST

Oct 30, 2026 EXPIRATION

TOST $29.50 Put

TOST261030P00029500

Latest saved OI137Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $29.50 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 137680 2026-10-09: 0 OI2026-10-13: 6 OI2026-10-14: 6 OI2026-10-15: 76 OI2026-10-16: 80 OI2026-10-21: 137 OI2026-10-23: 137 OI Oct 09, 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, 20261370
Oct 21, 2026Viewing137+57
Oct 16, 202680+4
Oct 15, 202676+70
Oct 14, 202660
Oct 13, 20266+6
Oct 09, 20260No prior observation