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Contract OI history

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Nov 20, 2026 EXPIRATION

ATS $17.50 Put

ATS261120P00017500

Latest saved OI2Oct 23, 2026
Last change-1vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ATS $17.50 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. 310 2026-10-02: 1 OI2026-10-05: 1 OI2026-10-06: 3 OI2026-10-07: 3 OI2026-10-08: 3 OI2026-10-09: 3 OI2026-10-13: 3 OI2026-10-15: 3 OI2026-10-16: 3 OI2026-10-21: 3 OI2026-10-23: 2 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

ATS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing2-1
Oct 21, 202630
Oct 16, 202630
Oct 15, 202630
Oct 13, 202630
Oct 09, 202630
Oct 08, 202630
Oct 07, 202630
Oct 06, 20263+2
Oct 05, 202610
Oct 02, 20261No prior observation