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Contract OI history

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Dec 18, 2026 EXPIRATION

TSM $400.00 Put

TSM261218P00400000

Latest saved OI22,220Oct 23, 2026
Last change+76vs 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. 22,22011,1100 2026-10-02: 21,352 OI2026-10-05: 21,310 OI2026-10-06: 21,284 OI2026-10-07: 21,358 OI2026-10-08: 21,358 OI2026-10-09: 21,450 OI2026-10-14: 21,861 OI2026-10-15: 21,782 OI2026-10-16: 21,939 OI2026-10-21: 22,144 OI2026-10-23: 22,220 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, 2026Viewing22,220+76
Oct 21, 202622,144+205
Oct 16, 202621,939+157
Oct 15, 202621,782-79
Oct 14, 202621,861+411
Oct 09, 202621,450+92
Oct 08, 202621,3580
Oct 07, 202621,358+74
Oct 06, 202621,284-26
Oct 05, 202621,310-42
Oct 02, 202621,352No prior observation