Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and Nasdaq Stock Market:
Amgen Inc., up $3.26 at $58.43
The biotech drugmaker said that it plans to buy back up to $5 billion of its stock in a modified Dutch auction tender offer.
Cameco Corp., down $1.34 at $20.11
The Canadian mining company said its third-quarter profit dropped 60 percent on charges related to a change in accounting methods.
Quicksilver Resources Inc., down 74 cents at $7.69
The energy company said profits rose 31.6 percent in the third quarter as it benefited from a series of long-term investments.
DreamWorks Animation SKG Inc., up $2.08 at $19.47
After a disappointing opening weekend, the film studio's "Puss in Boots" performed well at the box office in its second weekend out.
Force Protection Inc., up $1.29 at $5.50
The company, which makes armored vehicles, said it earned $4.5 million in the third quarter compared with a loss a year ago.
Dish Network Corp., up $1.18 at $24.66
Despite reporting another loss of subscribers, the New York-based satellite-TV company announced a $2 per share special dividend.
EchoStar Corp., down $1.08 at $25.36
The company, which sells set-top boxes, posted a loss for the third quarter on higher expenses due to a recent acquisition.
Tekelec, up $1.39 at $11.29
The network and mobile data management company is being acquired by a consortium led by Siris Capital Group LLC for $780 million.