Stocks that are moving substantially or trading heavily Thursday on the New York Stock Exchange and Nasdaq:
NYSE
Arcelor Mittal, up $3.58 at $100.58
The world's largest steel maker posted a 5 percent jump in first-quarter profit, but an executive warned rising prices may pressure demand and the industry.
CBS Corp., down 59 cents at $24.23
It will spend $1.8 billion in cash, the equivalent of $11.50 per share, for online media company CNET Networks Inc. in a move to bolster its Internet presence.
General Motors Corp., up $1.04 at $21.23
The automaker and the Canadian Auto Workers union have inked a new contract that will freeze wage increases for three years, but include cost-of-living adjustments.
J.C. Penney Co., up $2.07 at $46.32
Shares rose, even though the retail icon's first-quarter profit slumped nearly 50 percent as consumers tightened their wallets, and the company guided for a "difficult" 2008.
Blackstone Group L.P., up $1.04 at $20.54
Shares rose, even though the mammoth private equity fund, which went public about a year ago, posted its second consecutive quarterly loss as the credit and leveraged buyout markets shrank.
Blockbuster Inc., down 2 cents at $3.05
The movie rental chain swung to a first-quarter profit as domestic sales grew, a positive sign ahead of its planned buyout of Circuit City Stores Inc.
NASDAQ
Ctrip.com International Ltd., down $5.85 at $57.48
One of China's largest travel Web sites faces a "perfect storm" after a catastrophic earthquake paralyzed the nation and ahead of Olympic travel restrictions, an analyst said.
Yahoo Inc., up 61 cents at $27.75
Billionaire investor Carl Icahn has launched a proxy battle to replace the Internet portal's board of directors after it rebuffed Microsoft's takeover efforts.