Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and Nasdaq Stock Market:
Lubrizol Corp., up $29.24 at $134.68
Warren Buffett's Berkshire Hathaway Inc. plans to spend about $9 billion to buy specialty chemical maker Lubrizol Corp.
General Electric Co., down 44 cents at $19.92
The U.S. conglomerate's nuclear power unit helped design the plant that posed a nuclear meltdown threat after Japan's massive earthquake.
Aflac Inc., down $1.65 at $53.90
The U.S. company, a major insurance seller in Japan, said it expects a minimal sales impact from the earthquake and tsunami, but shares still fell.
Tiffany & Co., down $3.33 at $59.86
Shares of the upscale jewelry seller slid on worries about its large business in Japan, where investors fear a slowdown.
Las Vegas Sands Corp., down $1.44 at $38.62
A Jefferies analyst downgraded the casino company's investment rating, saying an SEC probe of its Macau operations would weigh on shares.
Denison Mines Corp., down 74 cents at $2.55
Fears about the safety of nuclear power because of the threat of a meltdown in Japan weighed on the uranium miner's shares.
First Solar Inc., up $7.17 at $146.91
Shares of the solar energy company rose amid worries about the safety of nuclear power and a constrained global supply of oil.
Corinthian Colleges Inc., up 37 cents at $4.91
The trade school chain cut its guidance for student enrollments, but backed its outlook and said student default rates were improving.