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Contract OI history

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Oct 23, 2026 EXPIRATION

TSM $420.00 Put

TSM261023P00420000

Latest saved OI1,611Oct 23, 2026
Last change-110vs 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. 1,7218600 2026-10-02: 416 OI2026-10-05: 408 OI2026-10-06: 676 OI2026-10-07: 713 OI2026-10-08: 713 OI2026-10-09: 1,071 OI2026-10-14: 1,230 OI2026-10-15: 1,159 OI2026-10-16: 1,233 OI2026-10-21: 1,721 OI2026-10-23: 1,611 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, 2026Viewing1,611-110
Oct 21, 20261,721+488
Oct 16, 20261,233+74
Oct 15, 20261,159-71
Oct 14, 20261,230+159
Oct 09, 20261,071+358
Oct 08, 20267130
Oct 07, 2026713+37
Oct 06, 2026676+268
Oct 05, 2026408-8
Oct 02, 2026416No prior observation