OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

IONS $55.00 Put

IONS270115P00055000

Latest saved OI401Oct 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 $55.00 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. 4012000 2026-10-09: 401 OI2026-10-13: 401 OI2026-10-14: 401 OI2026-10-16: 401 OI2026-10-19: 401 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, 2026Viewing4010
Oct 16, 20264010
Oct 14, 20264010
Oct 13, 20264010
Oct 09, 2026401No prior observation