OITracker Cboe delayed data

Contract OI history

Back to ON

Dec 18, 2026 EXPIRATION

ON $50.00 Put

ON261218P00050000

Latest saved OI879Oct 23, 2026
Last change+10vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ON $50.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 8794390 2026-10-09: 870 OI2026-10-13: 870 OI2026-10-14: 870 OI2026-10-15: 869 OI2026-10-16: 869 OI2026-10-21: 869 OI2026-10-23: 879 OI Oct 09, 2026Oct 23, 2026

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

ON contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing879+10
Oct 21, 20268690
Oct 16, 20268690
Oct 15, 2026869-1
Oct 14, 20268700
Oct 13, 20268700
Oct 09, 2026870No prior observation