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"Trump's return to office has created a genuine threat to [the dollar's] status for the first time in generations," according to Columbia University experts.

A reserve currency is ... deal of demand for dollars to facilitate these transactions. While oil is the most obvious example, there's a broader need for a world unit of exchange.

The U.S. Dollar edged a bit higher on Monday, after falling sharply last week as President Donald Trump announced his reciprocal tariffs, driving investors to other safe-haven assets. The greenback ...