OITracker Cboe delayed data

Contract OI history

Back to TOST

Jan 21, 2028 EXPIRATION

TOST $35.00 Put

TOST280121P00035000

Latest saved OI502Oct 23, 2026
Last change+45vs 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. 5022510 2026-10-02: 320 OI2026-10-05: 320 OI2026-10-06: 320 OI2026-10-07: 320 OI2026-10-08: 320 OI2026-10-09: 320 OI2026-10-13: 320 OI2026-10-14: 320 OI2026-10-15: 367 OI2026-10-16: 367 OI2026-10-21: 457 OI2026-10-23: 502 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, 2026Viewing502+45
Oct 21, 2026457+90
Oct 16, 20263670
Oct 15, 2026367+47
Oct 14, 20263200
Oct 13, 20263200
Oct 09, 20263200
Oct 08, 20263200
Oct 07, 20263200
Oct 06, 20263200
Oct 05, 20263200
Oct 02, 2026320No prior observation