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Contract OI history

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Jan 21, 2028 EXPIRATION

AMSC $20.00 Put

AMSC280121P00020000

Latest saved OI123Oct 23, 2026
Last change-10vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
AMSC $20.00 put open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 133660 2026-10-08: 93 OI2026-10-09: 93 OI2026-10-13: 93 OI2026-10-14: 132 OI2026-10-16: 133 OI2026-10-21: 133 OI2026-10-23: 123 OI Oct 08, 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, 2026Viewing123-10
Oct 21, 20261330
Oct 16, 2026133+1
Oct 14, 2026132+39
Oct 13, 2026930
Oct 09, 2026930
Oct 08, 202693No prior observation