Aug 3 : The yen rose for a third straight session on Monday, keeping traders on alert for further intervention after Tokyo and Washington stepped into the foreign exchange market last week to support Japan's currency.Meanwhile, oil prices sank more than $4 a barrel after U.S. President Donald Trump held back

Friday's move was first joint forex action by two countries since 2011

TOKYO -- The Japanese currency briefly surged to the lower 155 yen range against the US dollar on Monday morning after Japan confirmed joint currency market intervention with the…