OITracker Cboe delayed data

Contract OI history

Back to MSFT

Oct 23, 2026 EXPIRATION

MSFT $520.00 Put

MSFT261023P00520000

Latest saved OI2,463Oct 23, 2026
Last change-142vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $520.00 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. 2,6051,3020 2026-10-09: 415 OI2026-10-13: 1,187 OI2026-10-14: 1,187 OI2026-10-15: 1,336 OI2026-10-16: 2,236 OI2026-10-21: 2,605 OI2026-10-23: 2,463 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, 2026Viewing2,463-142
Oct 21, 20262,605+369
Oct 16, 20262,236+900
Oct 15, 20261,336+149
Oct 14, 20261,1870
Oct 13, 20261,187+772
Oct 09, 2026415No prior observation