Guggenheim Securities upgraded shares of Comcast Corporation (NASDAQ: ) as it believes core trends at Cable Communications, content momentum at NBC Universal, a uniquely strong balance sheet and an attractive relative valuation contribute to greater share appreciation in the next 12 months than it had previously forecast. Analysts Michael Morris and Curry Baker see incremental interest arising out of slower programming cost growth at Cable in 2018, advertising revenue momentum and a strong film slate.Read more