OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

U $40.00 Put

U280121P00040000

Latest saved OI2,301Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
U $40.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2,3011,1500 2026-10-02: 971 OI2026-10-05: 971 OI2026-10-06: 2,289 OI2026-10-07: 2,289 OI2026-10-08: 2,289 OI2026-10-09: 2,289 OI2026-10-14: 2,289 OI2026-10-15: 2,289 OI2026-10-16: 2,289 OI2026-10-21: 2,301 OI2026-10-23: 2,301 OI Oct 02, 2026Oct 23, 2026

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

U contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20262,3010
Oct 21, 2026Viewing2,301+12
Oct 16, 20262,2890
Oct 15, 20262,2890
Oct 14, 20262,2890
Oct 09, 20262,2890
Oct 08, 20262,2890
Oct 07, 20262,2890
Oct 06, 20262,289+1,318
Oct 05, 20269710
Oct 02, 2026971No prior observation