Investors have worries about Trump’s pick for Fed chair. Should they?

In an extraordinary break from the diplomatic restraint typical of central banks, a dozen leaders of the world’s foremost monetary institutions issued a joint statement in January declaring their “full solidarity” with the US Federal Reserve and its embattled chair, Jerome Powell. “The independence of central banks is a cornerstone of price, financial and economic stability in the interest of the citizens that we serve,” they wrote. The move was intended to shore up the separation of monetary...