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Contract OI history

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Jan 15, 2027 EXPIRATION

AMSC $20.00 Put

AMSC270115P00020000

Latest saved OI258Oct 23, 2026
Last change+1vs 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. 2581290 2026-10-08: 258 OI2026-10-09: 258 OI2026-10-13: 258 OI2026-10-14: 257 OI2026-10-16: 257 OI2026-10-21: 257 OI2026-10-23: 258 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, 2026Viewing258+1
Oct 21, 20262570
Oct 16, 20262570
Oct 14, 2026257-1
Oct 13, 20262580
Oct 09, 20262580
Oct 08, 2026258No prior observation