The major U.S. equity indices closed lower Monday as investors focused on moves in currencies and on continued concerns over Europe's economic problems. Manufacturing activity in Germany rose for the second month in April as the euro dropped against the dollar, reaching a fresh four-year low. The euro fell as low as $1.1878 before rising to $1.1935. In corporate news, Apple (NASDAQ:AAPL) shares fell 1.81% following its Worldwide Developers Conference. BP (NYSE:BP) shares fell 1.08% after the Coast Guard said that a containment cap is now collecting about 15,000 barrels of the oil in the Gulf of Mexico. The Dow Jones Industrial Average (DJI) closed 1.16% lower at 9,816.49, the S&P500 (INX) closed 1.35% lower at 1,050.47, and the Nasdaq Composite (IXIC) closed 2.04% lower at 2,173.90.