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Contract OI history

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Sep 17, 2027 EXPIRATION

TSM $420.00 Put

TSM270917P00420000

Latest saved OI363Oct 23, 2026
Last change+42vs 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. 4242120 2026-10-02: 288 OI2026-10-05: 388 OI2026-10-06: 399 OI2026-10-07: 400 OI2026-10-08: 400 OI2026-10-09: 421 OI2026-10-14: 423 OI2026-10-15: 385 OI2026-10-16: 424 OI2026-10-21: 321 OI2026-10-23: 363 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, 2026Viewing363+42
Oct 21, 2026321-103
Oct 16, 2026424+39
Oct 15, 2026385-38
Oct 14, 2026423+2
Oct 09, 2026421+21
Oct 08, 20264000
Oct 07, 2026400+1
Oct 06, 2026399+11
Oct 05, 2026388+100
Oct 02, 2026288No prior observation