OITracker Cboe delayed data

Contract OI history

Back to IONS

Nov 20, 2026 EXPIRATION

IONS $45.00 Put

IONS261120P00045000

Latest saved OI513Oct 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 $45.00 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. 5132560 2026-10-09: 455 OI2026-10-13: 494 OI2026-10-14: 506 OI2026-10-16: 512 OI2026-10-19: 513 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, 2026Viewing513+1
Oct 16, 2026512+6
Oct 14, 2026506+12
Oct 13, 2026494+39
Oct 09, 2026455No prior observation