Stock markets end strong year quietly

New York • Stocks ended a rocky 2010 quietly Friday. The major indexes were little changed and trading volume was at one of its lowest levels of the year as many traders took the day off. Despite investors’ concerns about the U.S. economy, the possibility of European countries defaulting on debt, the Standard & Poor’s 500 stock index and the Dow Jones industrial average both rose about 14 percent for the year, including dividends. The Nasdaq composite index rose about 18 percent after dividends....