The dollar is regaining its crown as one of the world’s most appealing assets, defying talk of a “Sell America” trade that had raised troubling questions about the outlook for the global reserve currency. A simple strategy of borrowing in low-yielding currencies like the Japanese yen or the Swiss franc and putting your money in dollars looks set to beat the implied returns on markets such as European stocks and Chinese government bonds once the volatility of these assets is taken into account,...
