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Contract OI history

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Oct 23, 2026 EXPIRATION

TSM $407.50 Put

TSM261023P00407500

Latest saved OI1,075Oct 23, 2026
Last change+586vs previous saved observation
Saved market days5Oct 14, 2026 onwards
Daily open interest Hover a point for its date and OI
TSM $407.50 put open interest history 5 saved observations from 2026-10-14 to 2026-10-23. Exact values and changes are listed in the table below. 1,0755370 2026-10-14: 0 OI2026-10-15: 73 OI2026-10-16: 156 OI2026-10-21: 489 OI2026-10-23: 1,075 OI Oct 14, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

TSM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,075+586
Oct 21, 2026489+333
Oct 16, 2026156+83
Oct 15, 202673+73
Oct 14, 20260No prior observation