US Airways Group Inc., down $2.46 to $16.36
The Justice Department challenged a proposed $11 billion merger between the carrier and American Airlines’ parent company, AMR.
J. C. Penney Co. Inc., down 49 cents to $12.68
William Ackman resigned from the board as part of a deal to resolve a very public spat between the activist investor and the struggling department store.
Eli Lilly and Co., up $1.40 to $54.96
The drugmaker said its potential lung cancer treatment necitumumab met a key research goal by helping to increase survival time for patients in a late-stage study.
Yum! Brands Inc., down $1.50 to $72.97
Shares of the company that runs Taco Bell, Pizza Hut and KFC restaurants slumped after reporting comparable-store sales in China, where it does half it business, fell 13 percent in July.
InterOil Corp., down $8.47 to $75.51
Its most recent quarterly profits disappointed Wall Street and the integrated energy company said it would explore the sale of some of its assets.
Micron Technology Inc., up $1.14 to $14.97
Micron is cutting 5 percent of its work force after the memory chip maker acquired Japanese competitor, Elpida.
BlackBerry Ltd., up 15 cents to 10.93
The struggling smartphone maker’s stock tacks on gains after announcing this week it may put itself up for sale. It also introduced the “super social” BlackBerry 9720.
Digital Generation Inc., up $2.29 to $12.60
The company, which helps advertisers find target markets on television and online, said it would sell its television business for $485 million to a rival.