The U.S. stock market is falling in midday trading after a setback in talks between Greece and its creditors heightened concerns that the country could default on its debts, AP reported. The Standard & Poor's 500 index is down around 14 points, or 0.7 percent, to 2,095 at midday. The Dow Jones industrial average fell 144 points, or 0.8 percent, to 17,895, and the Nasdaq composite lost 29 points, or 0.6 percent, to 5,053.
