OITracker Cboe delayed data

Contract OI history

Back to IA

Nov 20, 2026 EXPIRATION

IA $17.50 Put

IA261120P00017500

Latest saved OI224Oct 19, 2026
Last change+7vs previous saved observation
Saved market days6Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
IA $17.50 put open interest history 6 saved observations from 2026-10-08 to 2026-10-19. Exact values and changes are listed in the table below. 2241120 2026-10-08: 167 OI2026-10-09: 176 OI2026-10-13: 204 OI2026-10-14: 204 OI2026-10-16: 217 OI2026-10-19: 224 OI Oct 08, 2026Oct 19, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

IA contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 19, 2026Viewing224+7
Oct 16, 2026217+13
Oct 14, 20262040
Oct 13, 2026204+28
Oct 09, 2026176+9
Oct 08, 2026167No prior observation