Stocks closed with their biggest losses of the year as investors worried about the fallout from Greece's worsening debt crisis. In the biggest dip of the year for US stocks, the Dow Jones was down 2% while the Nasdaq tumbled 2.4% and The Standard & Poor's 500 index dropped by 2.1%. Asia was first to react to the growing prospect of Greek default and exit from the eurozone with stocks falling more than 3% in Hong Kong and Japan.