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Contract OI history

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Jan 21, 2028 EXPIRATION

IONS $27.50 Put

IONS280121P00027500

Latest saved OI0Oct 19, 2026
Last change0vs previous saved observation
Saved market days5Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
IONS $27.50 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. 10 2026-10-09: 0 OI2026-10-13: 0 OI2026-10-14: 0 OI2026-10-16: 0 OI2026-10-19: 0 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, 2026Viewing00
Oct 16, 202600
Oct 14, 202600
Oct 13, 202600
Oct 09, 20260No prior observation