OITracker Cboe delayed data

Contract OI history

Back to TOST

Dec 18, 2026 EXPIRATION

TOST $24.00 Put

TOST261218P00024000

Latest saved OI495Oct 23, 2026
Last change+41vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $24.00 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. 4952470 2026-10-02: 457 OI2026-10-05: 456 OI2026-10-06: 456 OI2026-10-07: 456 OI2026-10-08: 456 OI2026-10-09: 455 OI2026-10-13: 455 OI2026-10-14: 455 OI2026-10-15: 455 OI2026-10-16: 454 OI2026-10-21: 454 OI2026-10-23: 495 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, 2026Viewing495+41
Oct 21, 20264540
Oct 16, 2026454-1
Oct 15, 20264550
Oct 14, 20264550
Oct 13, 20264550
Oct 09, 2026455-1
Oct 08, 20264560
Oct 07, 20264560
Oct 06, 20264560
Oct 05, 2026456-1
Oct 02, 2026457No prior observation