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Contract OI history

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Oct 23, 2026 EXPIRATION

MSFT $507.50 Put

MSFT261023P00507500

Latest saved OI1,293Oct 23, 2026
Last change+336vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $507.50 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. 1,2936460 2026-10-09: 415 OI2026-10-13: 510 OI2026-10-14: 510 OI2026-10-15: 540 OI2026-10-16: 561 OI2026-10-21: 957 OI2026-10-23: 1,293 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, 2026Viewing1,293+336
Oct 21, 2026957+396
Oct 16, 2026561+21
Oct 15, 2026540+30
Oct 14, 20265100
Oct 13, 2026510+95
Oct 09, 2026415No prior observation