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Contract OI history

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May 21, 2027 EXPIRATION

ASTH $40.00 Put

ASTH270521P00040000

Latest saved OI329Oct 20, 2026
Last change0vs previous saved observation
Saved market days6Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
ASTH $40.00 put open interest history 6 saved observations from 2026-10-08 to 2026-10-20. Exact values and changes are listed in the table below. 3511750 2026-10-08: 351 OI2026-10-09: 351 OI2026-10-13: 327 OI2026-10-14: 329 OI2026-10-16: 329 OI2026-10-20: 329 OI Oct 08, 2026Oct 20, 2026

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

ASTH contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 20, 2026Viewing3290
Oct 16, 20263290
Oct 14, 2026329+2
Oct 13, 2026327-24
Oct 09, 20263510
Oct 08, 2026351No prior observation