OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

EDIT $2.50 Put

EDIT280121P00002500

Latest saved OI205Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
EDIT $2.50 put open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 2101050 2026-10-08: 210 OI2026-10-09: 210 OI2026-10-13: 210 OI2026-10-14: 210 OI2026-10-16: 205 OI2026-10-20: 205 OI2026-10-23: 205 OI Oct 08, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

EDIT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing2050
Oct 20, 20262050
Oct 16, 2026205-5
Oct 14, 20262100
Oct 13, 20262100
Oct 09, 20262100
Oct 08, 2026210No prior observation