May 12 : The U.S. dollar extended gains for a second straight session on Tuesday, underpinned by sustained uncertainty over the Middle East conflict that drove investors into the greenback as a traditional safe haven. The greenback rose sharply in March as the currencies of oil-reliant economies such as Japan and the euro area were heavily sold after oil prices surged following Iran’s effective closure of the Strait of Hormuz. It weakened again after April 7, the start of a ceasefire, which