Stocks posted their longest slump since February, the British pound tumbled and demand for haven assets sent German 10-year bond yields below zero for the first time, as new opinion polls fueled anxiety that the U.K. will vote to leave the European Union.
The MSCI All-Country World Index fell for a fourth day as sterling slid to a two-month low. Ten-year Treasuries ended the session little changed after a rally in the safest government bonds sent yields to unprecedented levels across much of the world. The yen strengthened against all but one of its 31 major peers and U.S. oil retreated to $48.49 a barrel. The biggest U.S. exchange-traded fund tracking Chinese shares slumped in extended trade after MSCI Inc. said it will again delay the country’s inclusion in its benchmark indexes.