OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

NI $40.00 Put

NI261120P00040000

Latest saved OI511Oct 23, 2026
Last change-6vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
NI $40.00 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. 5172580 2026-10-02: 387 OI2026-10-05: 387 OI2026-10-06: 387 OI2026-10-07: 387 OI2026-10-08: 387 OI2026-10-09: 387 OI2026-10-13: 387 OI2026-10-14: 461 OI2026-10-15: 511 OI2026-10-16: 516 OI2026-10-21: 517 OI2026-10-23: 511 OI Oct 02, 2026Oct 23, 2026

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

NI contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026511-6
Oct 21, 2026Viewing517+1
Oct 16, 2026516+5
Oct 15, 2026511+50
Oct 14, 2026461+74
Oct 13, 20263870
Oct 09, 20263870
Oct 08, 20263870
Oct 07, 20263870
Oct 06, 20263870
Oct 05, 20263870
Oct 02, 2026387No prior observation