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Contract OI history

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Oct 26, 2026 EXPIRATION

MSFT $520.00 Put

MSFT261026P00520000

Latest saved OI1,281Oct 23, 2026
Last change+1,004vs 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. 1,2816400 2026-10-09: 0 OI2026-10-13: 61 OI2026-10-14: 61 OI2026-10-15: 82 OI2026-10-16: 111 OI2026-10-21: 277 OI2026-10-23: 1,281 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, 2026Viewing1,281+1,004
Oct 21, 2026277+166
Oct 16, 2026111+29
Oct 15, 202682+21
Oct 14, 2026610
Oct 13, 202661+61
Oct 09, 20260No prior observation