Stocks fell, as deadly terrorist attacks in Brussels fueled demand for haven assets such as Treasuries, gold and the yen. Transportation companies led losses in U.S. and European shares after explosions rocked a Brussels airport departure hall and a downtown subway station. Treasuries pared this month’s drop, while the yield on 10-year German bunds touched the lowest in almost two weeks. The pound dropped against all its major peers amid speculation the blasts may boost the case for Britain leaving the European Union. Gold gained for the first time in four days. Two bombs went off in rapid succession at the Belgian airport and an explosion an hour later hit a subway station a short walk from EU headquarters. The incidents, which follow terror attacks in Paris in November and a suicide bombing in Istanbul on March 19, may add to security concerns in Europe as officials attempt to bring an ......