Markets have priced in a lot of upside potential for the U.S. but not yet for Europe, BlackRock's vice chairman told CNBC on Wednesday.

"U.S. markets are more richly priced than European markets….there is also the risk around trade policy… The cycle has been going on longer in the U.S. - the U.S. was the leader, Europe is kicking in later in this reflation cycle," posited Philipp Hildebrand, speaking at the IIF G20 summit in Frankfurt.