OITracker Cboe delayed data

Contract OI history

Back to TOST

Dec 18, 2026 EXPIRATION

TOST $35.00 Put

TOST261218P00035000

Latest saved OI463Oct 23, 2026
Last change-1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $35.00 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. 4662330 2026-10-02: 455 OI2026-10-05: 457 OI2026-10-06: 457 OI2026-10-07: 457 OI2026-10-08: 457 OI2026-10-09: 457 OI2026-10-13: 466 OI2026-10-14: 466 OI2026-10-15: 466 OI2026-10-16: 466 OI2026-10-21: 464 OI2026-10-23: 463 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, 2026Viewing463-1
Oct 21, 2026464-2
Oct 16, 20264660
Oct 15, 20264660
Oct 14, 20264660
Oct 13, 2026466+9
Oct 09, 20264570
Oct 08, 20264570
Oct 07, 20264570
Oct 06, 20264570
Oct 05, 2026457+2
Oct 02, 2026455No prior observation