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Contract OI history

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Oct 23, 2026 EXPIRATION

TSM $402.50 Put

TSM261023P00402500

Latest saved OI645Oct 23, 2026
Last change0vs previous saved observation
Saved market days5Oct 14, 2026 onwards
Daily open interest Hover a point for its date and OI
TSM $402.50 put open interest history 5 saved observations from 2026-10-14 to 2026-10-23. Exact values and changes are listed in the table below. 6453220 2026-10-14: 0 OI2026-10-15: 46 OI2026-10-16: 176 OI2026-10-21: 645 OI2026-10-23: 645 OI Oct 14, 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, 2026Viewing6450
Oct 21, 2026645+469
Oct 16, 2026176+130
Oct 15, 202646+46
Oct 14, 20260No prior observation