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Contract OI history

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Jan 21, 2028 EXPIRATION

TSM $640.00 Put

TSM280121P00640000

Latest saved OI249Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TSM $640.00 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. 2491240 2026-10-02: 232 OI2026-10-05: 247 OI2026-10-06: 247 OI2026-10-07: 247 OI2026-10-08: 247 OI2026-10-09: 248 OI2026-10-14: 249 OI2026-10-15: 249 OI2026-10-16: 249 OI2026-10-21: 249 OI2026-10-23: 249 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, 2026Viewing2490
Oct 21, 20262490
Oct 16, 20262490
Oct 15, 20262490
Oct 14, 2026249+1
Oct 09, 2026248+1
Oct 08, 20262470
Oct 07, 20262470
Oct 06, 20262470
Oct 05, 2026247+15
Oct 02, 2026232No prior observation