A wild week in the currency markets has left hedge funds heading for the exits on their dollar trades and turning their attention toward the Japanese yen.

TOKYO--Japan's top currency official pledged to stay on guard against potential reaction in the foreign exchange market to President Trump's policies, which have already caused some swings in the yen ...

Maxiphoto / Getty Images The foreign currency exchange market ... the British pound, the Japanese yen, the Australian dollar, and the Canadian dollar. There are reasons why each of these ...