OITracker Cboe delayed data

Contract OI history

Back to MAR

Jan 21, 2028 EXPIRATION

MAR $300.00 Put

MAR280121P00300000

Latest saved OI134Oct 23, 2026
Last change-7vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MAR $300.00 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. 141700 2026-10-09: 141 OI2026-10-13: 141 OI2026-10-14: 141 OI2026-10-15: 141 OI2026-10-16: 141 OI2026-10-21: 141 OI2026-10-23: 134 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, 2026Viewing134-7
Oct 21, 20261410
Oct 16, 20261410
Oct 15, 20261410
Oct 14, 20261410
Oct 13, 20261410
Oct 09, 2026141No prior observation