Take a look at some of Friday's midday movers:
Stocks rose sharply and all three major indices turned positive for the week following better-than-expected monthly jobs data.
Wal-Mart gained ground after the world's biggest retailer announced a new $15 billion share repurchase program. The repurchase plan replaces the previous $15 billion program announced in June 2011.
Iron Mountain was sharply lower following news that U.S. tax authorities are questioning the document storage company's proposed conversion plan to become a REIT.