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Contract OI history

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Nov 20, 2026 EXPIRATION

AMSC $18.00 Put

AMSC261120P00018000

Latest saved OI64Oct 23, 2026
Last change+4vs previous saved observation
Saved market days4Oct 14, 2026 onwards
Daily open interest Hover a point for its date and OI
AMSC $18.00 put open interest history 4 saved observations from 2026-10-14 to 2026-10-23. Exact values and changes are listed in the table below. 64320 2026-10-14: 0 OI2026-10-16: 57 OI2026-10-21: 60 OI2026-10-23: 64 OI Oct 14, 2026Oct 23, 2026

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

AMSC contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing64+4
Oct 21, 202660+3
Oct 16, 202657+57
Oct 14, 20260No prior observation