OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

IONS $40.00 Put

IONS270115P00040000

Latest saved OI380Oct 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 $40.00 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. 3801900 2026-10-09: 343 OI2026-10-13: 343 OI2026-10-14: 343 OI2026-10-16: 380 OI2026-10-19: 380 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, 2026Viewing3800
Oct 16, 2026380+37
Oct 14, 20263430
Oct 13, 20263430
Oct 09, 2026343No prior observation