Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and Nasdaq Stock Market:
Arch Coal Inc., down 77 cents at $33.53
The miner will buy rival International Coal for $3.4 billion, forming the country's No. 2 supplier of coal used to make steel.
Tenet Healthcare Corp., down 24 cents at $6.69
Community Health Systems raised its bid for the hospital operator to $3.5 billion, saying the "final offer" will expire May 9.
International Paper Co., up $1.26 at $32.14
A Barron's article said the rebound in demand for the manufacturer's paper and packaging isn't reflected in its stock price.
Teva Pharmaceutical Industries Ltd., up $1.54 at $47.27
The world's largest generic drug developer is buying biopharmaceutical company Cephalon Inc. for $6.8 billion.
TiVo Inc., down 29 cents at $9.86
Dish Network Corp. and EchoStar Corp. will pay the digital video recorder maker $500 million to settle a patent lawsuit.
Whole Foods Market Inc., down $3.12 at $59.64
A Jefferies analyst cut the natural foods grocery chain to "Hold" from "Buy" because he thinks sales growth has slowed.
YRC Worldwide Inc., down 47 cents at $1.51
A restructuring plan will leave the trucking company's existing stockholders with just 2.5 percent of outstanding shares.
Volcom Inc., up $4.67 at $24.40
France's PPR, owner of luxury label Gucci and sneaker company Puma, is buying the sportswear maker for $607.5 million.