OITracker Cboe delayed data

Contract OI history

Back to MSFT

Nov 20, 2026 EXPIRATION

MSFT $550.00 Put

MSFT261120P00550000

Latest saved OI913Oct 23, 2026
Last change+40vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $550.00 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. 9134560 2026-10-09: 315 OI2026-10-13: 819 OI2026-10-14: 819 OI2026-10-15: 801 OI2026-10-16: 807 OI2026-10-21: 873 OI2026-10-23: 913 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, 2026Viewing913+40
Oct 21, 2026873+66
Oct 16, 2026807+6
Oct 15, 2026801-18
Oct 14, 20268190
Oct 13, 2026819+504
Oct 09, 2026315No prior observation