Take a look at some of Friday's midday movers:
Sprint moved higher after Cowen upgraded the mobile carrier's stock to "outperform" from "market perform," citing new management and network changes that make the company a long-term investment opportunity.
T-Mobile gained ground after CEO John Legere told investors at a New York Conference the company added 552,000 post-paid customers in August, more than any other month in its history.
Vail Resorts continued to move higher on news that Credit Suisse is raising its price target to $97 from $87, a day after Vail said it would acquire Utah's Park City Mountain Resort for $182.5 million.
XPO Logistics surged on news the air delivery and freight services company secured a $700 million investment from the Ontario Teachers' Pension Plan, PSP Investments and Singapore's Sovereign Wealth Fund GIC. The sale gives the three funds a 21 percent stake in the company.
Yahoo moved higher on news that Alibaba, which the U.S. firm has a 22.5 percent stake in, will close the books on its IPO because of strong demand.
Valeant Pharmaceuticals gained ground after Pershing Capital's Bill Ackman said investors owning more than 35 percent of Allergan have asked that company to hold a special meeting. Ackman is trying to broker a sale of Allergan to Valeant.
General Motors lost ground after the automaker issued a "stop delivery" order on one of its hottest selling vehicles, the 2015 Chevrolet Corvette.
Eli Lilly moved a bit higher on news its colon cancer drug succeeded in a late stage trial.
Novo Nordisk rose after an FDA advisory panel said its obesity drug was safe and effective to warrant approval .
DDR moved lower after announcing that CEO Daniel Hurwitz will not renew his employment agreement with the REIT.