Comcast, Cablevision stocks fall on cloudy outlook By: MarketWatch May 10, 2010 at 12:26 PM EDT Comcast and Cablevision shares sit out the stock market’s broad-based rally, undercut by Bernstein Research’s downgrade of the U.S. cable-television sector. Read More >> Related Stocks: AT&T Inc Cablevision Systems Comcast Corp Time Warner Cable Verizon Communications