OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

TOST $23.00 Put

TOST261218P00023000

Latest saved OI1,025Oct 23, 2026
Last change+4vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $23.00 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. 1,0255120 2026-10-02: 987 OI2026-10-05: 981 OI2026-10-06: 981 OI2026-10-07: 981 OI2026-10-08: 981 OI2026-10-09: 981 OI2026-10-13: 981 OI2026-10-14: 981 OI2026-10-15: 993 OI2026-10-16: 993 OI2026-10-21: 1,021 OI2026-10-23: 1,025 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, 20261,025+4
Oct 21, 2026Viewing1,021+28
Oct 16, 20269930
Oct 15, 2026993+12
Oct 14, 20269810
Oct 13, 20269810
Oct 09, 20269810
Oct 08, 20269810
Oct 07, 20269810
Oct 06, 20269810
Oct 05, 2026981-6
Oct 02, 2026987No prior observation