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Contract OI history

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Oct 23, 2026 EXPIRATION

TSM $397.50 Put

TSM261023P00397500

Latest saved OI390Oct 23, 2026
Last change+14vs previous saved observation
Saved market days5Oct 14, 2026 onwards
Daily open interest Hover a point for its date and OI
TSM $397.50 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. 3901950 2026-10-14: 0 OI2026-10-15: 12 OI2026-10-16: 123 OI2026-10-21: 376 OI2026-10-23: 390 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, 2026Viewing390+14
Oct 21, 2026376+253
Oct 16, 2026123+111
Oct 15, 202612+12
Oct 14, 20260No prior observation