OITracker Cboe delayed data

Contract OI history

Back to TOST

Jan 15, 2027 EXPIRATION

TOST $25.00 Put

TOST270115P00025000

Latest saved OI12,847Oct 23, 2026
Last change+19vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $25.00 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. 12,8476,4230 2026-10-02: 12,837 OI2026-10-05: 12,837 OI2026-10-06: 12,837 OI2026-10-07: 12,838 OI2026-10-08: 12,838 OI2026-10-09: 12,837 OI2026-10-13: 12,827 OI2026-10-14: 12,827 OI2026-10-15: 12,827 OI2026-10-16: 12,828 OI2026-10-21: 12,828 OI2026-10-23: 12,847 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, 2026Viewing12,847+19
Oct 21, 202612,8280
Oct 16, 202612,828+1
Oct 15, 202612,8270
Oct 14, 202612,8270
Oct 13, 202612,827-10
Oct 09, 202612,837-1
Oct 08, 202612,8380
Oct 07, 202612,838+1
Oct 06, 202612,8370
Oct 05, 202612,8370
Oct 02, 202612,837No prior observation