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Contract OI history

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Dec 18, 2026 EXPIRATION

TSM $420.00 Put

TSM261218P00420000

Latest saved OI7,139Oct 23, 2026
Last change+81vs 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. 7,1393,5690 2026-10-02: 3,725 OI2026-10-05: 3,774 OI2026-10-06: 6,313 OI2026-10-07: 6,357 OI2026-10-08: 6,357 OI2026-10-09: 6,429 OI2026-10-14: 6,516 OI2026-10-15: 6,521 OI2026-10-16: 6,684 OI2026-10-21: 7,058 OI2026-10-23: 7,139 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, 2026Viewing7,139+81
Oct 21, 20267,058+374
Oct 16, 20266,684+163
Oct 15, 20266,521+5
Oct 14, 20266,516+87
Oct 09, 20266,429+72
Oct 08, 20266,3570
Oct 07, 20266,357+44
Oct 06, 20266,313+2,539
Oct 05, 20263,774+49
Oct 02, 20263,725No prior observation