OITracker Cboe delayed data

Contract OI history

Back to QS

Jan 21, 2028 EXPIRATION

QS $4.00 Put

QS280121P00004000

Latest saved OI7,916Oct 23, 2026
Last change+50vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
QS $4.00 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. 7,9163,9580 2026-10-09: 7,360 OI2026-10-13: 7,863 OI2026-10-14: 7,863 OI2026-10-15: 7,864 OI2026-10-16: 7,866 OI2026-10-21: 7,866 OI2026-10-23: 7,916 OI Oct 09, 2026Oct 23, 2026

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

QS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing7,916+50
Oct 21, 20267,8660
Oct 16, 20267,866+2
Oct 15, 20267,864+1
Oct 14, 20267,8630
Oct 13, 20267,863+503
Oct 09, 20267,360No prior observation