OITracker Cboe delayed data

Contract OI history

Back to MAR

Dec 18, 2026 EXPIRATION

MAR $340.00 Put

MAR261218P00340000

Latest saved OI196Oct 23, 2026
Last change+5vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MAR $340.00 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. 196980 2026-10-09: 190 OI2026-10-13: 193 OI2026-10-14: 193 OI2026-10-15: 192 OI2026-10-16: 191 OI2026-10-21: 191 OI2026-10-23: 196 OI Oct 09, 2026Oct 23, 2026

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

MAR contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing196+5
Oct 21, 20261910
Oct 16, 2026191-1
Oct 15, 2026192-1
Oct 14, 20261930
Oct 13, 2026193+3
Oct 09, 2026190No prior observation