OITracker Cboe delayed data

Contract OI history

Back to SERV

Jan 21, 2028 EXPIRATION

SERV $17.00 Put

SERV280121P00017000

Latest saved OI33Oct 23, 2026
Last change-2vs previous saved observation
Saved market days6Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
SERV $17.00 put open interest history 6 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 35170 2026-10-09: 35 OI2026-10-13: 35 OI2026-10-14: 35 OI2026-10-16: 35 OI2026-10-20: 35 OI2026-10-23: 33 OI Oct 09, 2026Oct 23, 2026

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

SERV contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing33-2
Oct 20, 2026350
Oct 16, 2026350
Oct 14, 2026350
Oct 13, 2026350
Oct 09, 202635No prior observation