OITracker Cboe delayed data

Contract OI history

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Oct 23, 2026 EXPIRATION

TOST $30.50 Call

TOST261023C00030500

Latest saved OI348Oct 23, 2026
Last change+1vs previous saved observation
Saved market days11Oct 05, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $30.50 call open interest history 11 saved observations from 2026-10-05 to 2026-10-23. Exact values and changes are listed in the table below. 3481740 2026-10-05: 1 OI2026-10-06: 1 OI2026-10-07: 2 OI2026-10-08: 2 OI2026-10-09: 2 OI2026-10-13: 2 OI2026-10-14: 2 OI2026-10-15: 334 OI2026-10-16: 334 OI2026-10-21: 347 OI2026-10-23: 348 OI Oct 05, 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, 2026348+1
Oct 21, 2026Viewing347+13
Oct 16, 20263340
Oct 15, 2026334+332
Oct 14, 202620
Oct 13, 202620
Oct 09, 202620
Oct 08, 202620
Oct 07, 20262+1
Oct 06, 202610
Oct 05, 20261No prior observation