Stocks Close with Biggest Weekly Loss

        On Wall Street stocks closed the book on their biggest weekly loss in well over a year.
        Friday the Dow plunged 318 points, its biggest one day loss since the summer.
        The Nasdaq tumbled 91, and the S&P 500 lost 38 points.        
        Investors are worried about a possible slowdown in China's economy.
        Investors are bracing for another possible pullback to the fed's stimulus program, which should translate into higher interest rates in the coming months.