De or het portfoliomanagement?

The correct Dutch article is:

het portfoliomanagement

Rule Words ending in -ment: usually het. See the rule

How to use portfoliomanagement

the portfoliomanagementhet portfoliomanagement
this portfoliomanagementdit portfoliomanagement
that portfoliomanagementdat portfoliomanagement
our portfoliomanagementons portfoliomanagement
your portfoliomanagementjouw portfoliomanagement
every portfoliomanagementelk portfoliomanagement
which portfoliomanagement?welk portfoliomanagement?
a big portfoliomanagement / the big portfoliomanagementeen groot portfoliomanagement, het grote portfoliomanagement