Metal Funds Rule Commodities in May as Traders Bet on Gains

Investors are buying into industrial-metal funds at a faster pace than any other commodity, underscoring optimism about the health of the global economy.

U.S. exchange-traded products backed by the metals attracted $71.1 million in May, putting flows on track for the biggest monthly increase since 2012, according to data compiled by Bloomberg as of Wednesday. The extra funds represent a 22 percent increase in market value, more than other commodity groups such as agriculture and energy.