SAN FRANCISCO (MarketWatch) -- U.S. stocks dove Tuesday, suffering their worst one-day loss this year, as fears of an abrupt, damaging Greek debt default resurfaced amid speculation Greek bondholders would avoid a planned debt restructuring. The Dow Jones Industrial Average DJIA, -0.47% fell 203.66 points, or 1.6%, to 12,759.15, its first loss of more than 200 points since November 23. The S&P 500 SPX, -0.48% lost 20.97 points, or 1.5%, to 1,343.36, led by 2% declines in financials and industrial stocks. The Nasdaq Composite COMP, -0.29% lost 40.16 points, or 1.4%, to 2,910.32. "Investors are paying a little more attention to the risk side of the market now that the market has made a nice move off its [October] lows," said Stuart Freeman, chief equity strategist at Wells Fargo Advisors.