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Contract OI history

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Feb 19, 2027 EXPIRATION

TSM $420.00 Put

TSM270219P00420000

Latest saved OI798Oct 23, 2026
Last change+290vs 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. 7983990 2026-10-02: 313 OI2026-10-05: 315 OI2026-10-06: 379 OI2026-10-07: 375 OI2026-10-08: 375 OI2026-10-09: 379 OI2026-10-14: 381 OI2026-10-15: 385 OI2026-10-16: 414 OI2026-10-21: 508 OI2026-10-23: 798 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, 2026Viewing798+290
Oct 21, 2026508+94
Oct 16, 2026414+29
Oct 15, 2026385+4
Oct 14, 2026381+2
Oct 09, 2026379+4
Oct 08, 20263750
Oct 07, 2026375-4
Oct 06, 2026379+64
Oct 05, 2026315+2
Oct 02, 2026313No prior observation