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Contract OI history

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Jan 15, 2027 EXPIRATION

IONS $32.50 Put

IONS270115P00032500

Latest saved OI641Oct 19, 2026
Last change+1vs previous saved observation
Saved market days5Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
IONS $32.50 put open interest history 5 saved observations from 2026-10-09 to 2026-10-19. Exact values and changes are listed in the table below. 6413200 2026-10-09: 640 OI2026-10-13: 640 OI2026-10-14: 640 OI2026-10-16: 640 OI2026-10-19: 641 OI Oct 09, 2026Oct 19, 2026

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

IONS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 19, 2026Viewing641+1
Oct 16, 20266400
Oct 14, 20266400
Oct 13, 20266400
Oct 09, 2026640No prior observation