Goldman Sachs issued Thursday a slew of rating changes on media and telecom service stocks, including Verizon Communications Inc. VZ, Charter Communications Inc CHTR, DISH Network Corp DISH and Sirius XM Holdings Inc SIRI. Goldman’s Brett Feldman upgraded Verizon and Charter from Neutral to Buy, with price targets raised from $51 to $56 and from $315 to $361, respectively. Charter received a downgrade from Buy to Neutral with a price target cut from $63 to $39. Finally, Feldman downgraded Sirius from Neutral to Sell, maintaining his $6 price target. Source