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Contract OI history

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Dec 18, 2026 EXPIRATION

TSM $440.00 Put

TSM261218P00440000

Latest saved OI2,451Oct 23, 2026
Last change-41vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TSM $440.00 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. 2,4921,2460 2026-10-02: 1,889 OI2026-10-05: 1,890 OI2026-10-06: 2,163 OI2026-10-07: 2,333 OI2026-10-08: 2,333 OI2026-10-09: 2,386 OI2026-10-14: 2,397 OI2026-10-15: 2,416 OI2026-10-16: 2,431 OI2026-10-21: 2,492 OI2026-10-23: 2,451 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, 2026Viewing2,451-41
Oct 21, 20262,492+61
Oct 16, 20262,431+15
Oct 15, 20262,416+19
Oct 14, 20262,397+11
Oct 09, 20262,386+53
Oct 08, 20262,3330
Oct 07, 20262,333+170
Oct 06, 20262,163+273
Oct 05, 20261,890+1
Oct 02, 20261,889No prior observation