OITracker Cboe delayed data

Contract OI history

Back to MAR

Jan 21, 2028 EXPIRATION

MAR $340.00 Put

MAR280121P00340000

Latest saved OI316Oct 23, 2026
Last change0vs 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. 3161580 2026-10-09: 306 OI2026-10-13: 306 OI2026-10-14: 316 OI2026-10-15: 316 OI2026-10-16: 316 OI2026-10-21: 316 OI2026-10-23: 316 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, 2026Viewing3160
Oct 21, 20263160
Oct 16, 20263160
Oct 15, 20263160
Oct 14, 2026316+10
Oct 13, 20263060
Oct 09, 2026306No prior observation