Dow rises nearly 500 points after Merck's announcement about a potential pill
(Newser) -
October began on Wall Street much better than September ended . The Dow posted a strong gain of 482 points, or 1.4%, to 34,326; the S&P 500 rose 49 points, or 1.1%, to 4,357; and the Nasdaq rose 118 points, or 0.8%, to 14,566....