Bloomberg Econoday sees it like this.
ISM December 2019
I did not capture the data before it was revised to unchanged.
The December ISM PMI was originally reported at 47.2, then revised to 48.1 today. Yet, January is now supposedly unchanged at 50.9.
Supplier deliveries were heavily revised and that component is part of the "unchanged" headline number.
Mike "Mish" Shedlock