OITracker Cboe delayed data

Contract OI history

Back to ON

Jan 15, 2027 EXPIRATION

ON $55.00 Put

ON270115P00055000

Latest saved OI3,559Oct 23, 2026
Last change+13vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ON $55.00 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. 3,5591,7790 2026-10-09: 3,539 OI2026-10-13: 3,540 OI2026-10-14: 3,540 OI2026-10-15: 3,540 OI2026-10-16: 3,540 OI2026-10-21: 3,546 OI2026-10-23: 3,559 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, 2026Viewing3,559+13
Oct 21, 20263,546+6
Oct 16, 20263,5400
Oct 15, 20263,5400
Oct 14, 20263,5400
Oct 13, 20263,540+1
Oct 09, 20263,539No prior observation