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Contract OI history

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Jan 21, 2028 EXPIRATION

TSM $400.00 Put

TSM280121P00400000

Latest saved OI564Oct 23, 2026
Last change-7vs 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. 6133060 2026-10-02: 367 OI2026-10-05: 367 OI2026-10-06: 368 OI2026-10-07: 374 OI2026-10-08: 374 OI2026-10-09: 395 OI2026-10-14: 430 OI2026-10-15: 434 OI2026-10-16: 613 OI2026-10-21: 571 OI2026-10-23: 564 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, 2026Viewing564-7
Oct 21, 2026571-42
Oct 16, 2026613+179
Oct 15, 2026434+4
Oct 14, 2026430+35
Oct 09, 2026395+21
Oct 08, 20263740
Oct 07, 2026374+6
Oct 06, 2026368+1
Oct 05, 20263670
Oct 02, 2026367No prior observation