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Contract OI history

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Nov 20, 2026 EXPIRATION

IONS $42.50 Put

IONS261120P00042500

Latest saved OI119Oct 19, 2026
Last change+82vs previous saved observation
Saved market days5Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
IONS $42.50 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. 119590 2026-10-09: 30 OI2026-10-13: 37 OI2026-10-14: 37 OI2026-10-16: 37 OI2026-10-19: 119 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, 2026Viewing119+82
Oct 16, 2026370
Oct 14, 2026370
Oct 13, 202637+7
Oct 09, 202630No prior observation