OITracker Cboe delayed data

Contract OI history

Back to MSFT

Jan 21, 2028 EXPIRATION

MSFT $320.00 Put

MSFT280121P00320000

Latest saved OI2,590Oct 23, 2026
Last change+18vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $320.00 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. 2,5901,2950 2026-10-09: 2,347 OI2026-10-13: 2,479 OI2026-10-14: 2,479 OI2026-10-15: 2,508 OI2026-10-16: 2,568 OI2026-10-21: 2,572 OI2026-10-23: 2,590 OI Oct 09, 2026Oct 23, 2026

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

MSFT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing2,590+18
Oct 21, 20262,572+4
Oct 16, 20262,568+60
Oct 15, 20262,508+29
Oct 14, 20262,4790
Oct 13, 20262,479+132
Oct 09, 20262,347No prior observation