President Obama might be getting good reviews for his plan to shore up the US economy, but investors are far more worried about Europe, reports MarketWatch. The Dow was down more than 300 points at midday to below 11,000, and both Nasdaq and the S&P 500 were each down more than 2.6%. A Bloomberg report that Germany is preparing a contingency plan to protect its banks from a Greece default is contributing to the malaise. (More stock market stories.)