DAVOS, Switzerland (Reuters) - The chief executive of Norway's $1.8 trillion sovereign wealth fund, one of the world's largest investors, said on Thursday that inflationary pressure in the United States was one of the biggest risks to financial markets this year.

Nicolai Tangen, CEO of Norway's sovereign wealth fund, warns that inflation in the United States poses a risk to financial markets. He also highlights global sovereign debt levels as a concern, suggesting investors may soon demand more to finance governments.

Norway's $1.8 trillion sovereign wealth fund, the world's largest, reported on Wednesday a record annual profit of 2.51 trillion crowns ($222 billion), driven by last year's tech rally, but warned that strong returns won't last forever.