OITracker Cboe delayed data

Contract OI history

Back to COST

Sep 15, 2028 EXPIRATION

COST $1000.00 Put

COST280915P01000000

Latest saved OI184Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $1000.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 184920 2026-10-09: 157 OI2026-10-13: 159 OI2026-10-14: 159 OI2026-10-15: 167 OI2026-10-16: 168 OI2026-10-21: 184 OI2026-10-23: 184 OI Oct 09, 2026Oct 23, 2026

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

COST contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1840
Oct 21, 2026184+16
Oct 16, 2026168+1
Oct 15, 2026167+8
Oct 14, 20261590
Oct 13, 2026159+2
Oct 09, 2026157No prior observation