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Contract OI history

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Apr 16, 2027 EXPIRATION

MSFT $420.00 Put

MSFT270416P00420000

Latest saved OI712Oct 23, 2026
Last change+59vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $420.00 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. 7123560 2026-10-09: 211 OI2026-10-13: 259 OI2026-10-14: 259 OI2026-10-15: 295 OI2026-10-16: 297 OI2026-10-21: 653 OI2026-10-23: 712 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, 2026Viewing712+59
Oct 21, 2026653+356
Oct 16, 2026297+2
Oct 15, 2026295+36
Oct 14, 20262590
Oct 13, 2026259+48
Oct 09, 2026211No prior observation