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Contract OI history

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Oct 23, 2026 EXPIRATION

TSM $400.00 Put

TSM261023P00400000

Latest saved OI1,979Oct 23, 2026
Last change+203vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TSM $400.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 1,9799890 2026-10-02: 426 OI2026-10-05: 559 OI2026-10-06: 557 OI2026-10-07: 553 OI2026-10-08: 553 OI2026-10-09: 580 OI2026-10-14: 1,053 OI2026-10-15: 1,182 OI2026-10-16: 1,457 OI2026-10-21: 1,776 OI2026-10-23: 1,979 OI Oct 02, 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, 2026Viewing1,979+203
Oct 21, 20261,776+319
Oct 16, 20261,457+275
Oct 15, 20261,182+129
Oct 14, 20261,053+473
Oct 09, 2026580+27
Oct 08, 20265530
Oct 07, 2026553-4
Oct 06, 2026557-2
Oct 05, 2026559+133
Oct 02, 2026426No prior observation