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Contract OI history

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Oct 30, 2026 EXPIRATION

TSM $420.00 Put

TSM261030P00420000

Latest saved OI1,424Oct 23, 2026
Last change+79vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TSM $420.00 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. 1,4247120 2026-10-02: 433 OI2026-10-05: 401 OI2026-10-06: 449 OI2026-10-07: 500 OI2026-10-08: 500 OI2026-10-09: 914 OI2026-10-14: 941 OI2026-10-15: 1,003 OI2026-10-16: 1,212 OI2026-10-21: 1,345 OI2026-10-23: 1,424 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, 2026Viewing1,424+79
Oct 21, 20261,345+133
Oct 16, 20261,212+209
Oct 15, 20261,003+62
Oct 14, 2026941+27
Oct 09, 2026914+414
Oct 08, 20265000
Oct 07, 2026500+51
Oct 06, 2026449+48
Oct 05, 2026401-32
Oct 02, 2026433No prior observation