U.S. stocks closed lower Monday, as investors feared a possible government shutdown. In U.S. economic news, the shutdown was not the only thing in Washington that investors were worried about. Stocks have pulled back recently as the United States gets closer to hitting the debt ceiling. If Congress fails to increase the debt limit, the U.S. government won\'t be able to pay all of its bills later this month. In international news, U.S. government shutdown fears hit world markets too, as European markets and most Asian markets closed with losses, though the Shanghai Composite moved higher. China launched a free trade zone in Shanghai Sunday, an experiment in promoting trade and expanding foreign investments in China. The Dow Jones industrial average lost 128.57, or 0.84 percent, to 15,129.67. The broader Standard & Poor\'s 500 index fell 10.2, or 0.60 percent, to 1,681.55. The technology-heavy Nasdaq composite index dropped 10.11, or 0.27 percent, to 3,771.48.