OITracker Cboe delayed data

Contract OI history

Back to TOST

Dec 18, 2026 EXPIRATION

TOST $28.00 Put

TOST261218P00028000

Latest saved OI402Oct 23, 2026
Last change+11vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $28.00 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. 4262130 2026-10-02: 411 OI2026-10-05: 409 OI2026-10-06: 406 OI2026-10-07: 406 OI2026-10-08: 406 OI2026-10-09: 426 OI2026-10-13: 422 OI2026-10-14: 422 OI2026-10-15: 396 OI2026-10-16: 395 OI2026-10-21: 391 OI2026-10-23: 402 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, 2026402+11
Oct 21, 2026Viewing391-4
Oct 16, 2026395-1
Oct 15, 2026396-26
Oct 14, 20264220
Oct 13, 2026422-4
Oct 09, 2026426+20
Oct 08, 20264060
Oct 07, 20264060
Oct 06, 2026406-3
Oct 05, 2026409-2
Oct 02, 2026411No prior observation