Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and Nasdaq Stock Market:
Arch Chemicals Inc., up $5.20 at $47.37
Swiss drugmaker Lonza will buy the Norwalk, Conn.,-based maker of antibacterial products for $1.2 billion.
Navigant Consulting Inc., up 57 cents at $11.08
A Baird analyst raised the business services firm to "Outperform," saying it will get a boost from increasing corporate litigation.
Hhgregg Inc., down 53 cents at $13.07
A William Blair analyst said the regional electronics retailer could lose market share to online stores like Amazon.com.
News Corp., down $1.27 at $15.48
The British government referred the media company's bid for British Sky Broadcasting for further review, delaying the decision.
Sirius XM Radio Inc., down 1 cent at $2.21
The satellite radio company is being added to an index that is made up of the 100 largest non-financial stocks on the Nasdaq.
Ruth's Hospitality Group Inc., up 2 cents at $6.42
A weekend article in Barron's predicted that the steakhouse chain's stock could rise as business spending recovers.
Microsemi Corp., up 36 cents at $21.23
An Oppenheimer analyst upgraded the chip maker to "Outperform" and set a $28 price target on the stock.
Gulfport Energy Corp., down $2.14 at $29.50
The oil and natural gas producer is selling 3 million common shares to repay debt and for acquisitions.