The weak shall inherit the earth

New government priorities and an enthusiasm for unconventional monetary policy are changing the way the currency markets work.
OVER most of history, most countries have wanted a strong currency—or at least a stable one. In the days of the gold standard and the Bretton Woods system, governments made great efforts to maintain exchange-rate pegs, even if the interest rates needed to do so prompted economic downturns. Only in exceptional economic circumstances, such as those of the 1930s and the 1970s, were those efforts deemed too painful and the pegs abandoned.