Dow Jones Industrial Average Drops After S&P Downgrades Greece, But Closes Out Best Week Since January 2013

U.S. stocks closed lower Friday, with the Dow briefly dropping more than 100 points during the last hour of trading after Standard & Poor's downgraded Greece's credit rating with a negative outlook, reigniting concerns about the health of the global economy. However, for the week, the Dow rose 658 points, or 3.83 percent, marking its best week since January 2013.