Stocks that moved substantially or traded heavily Thursday on the New York Stock Exchange and Nasdaq Stock Market:
NYSE
Schering-Plough Corp., up $1.52 at $15.38
About 10 percent of the drug maker's 55,000 employees are being laid off, bringing about $1 billion per year in savings.
Bear Stearns Cos., up 14 cents at $10.72
Federal Reserve Chairman Ben Bernanke, in remarks to lawmakers, defended the central bank's role in aiding the sale of the investment bank to JPMorgan Chase & Co.
Southwest Airlines Co., down 7 cents at $12.71
The carrier will rebook or refund passengers scheduled to travel on ATA Airlines, which filed for bankruptcy and had a code-sharing agreement with the airline.
Constellation Brands Inc., up $1 at $19.72
Excluding a charge on its wine businesses in Australia and Britain, the wine company's profit topped expectations on strong liquor sales.
MEMC Electronic Materials Inc., down $2.63 at $73.76
Production issues caused the solar power wafer maker to lower its first-quarter revenue outlook below expectations.
NASDAQ
Garmin Ltd., down $3.60 at $52.81
The personal navigation device maker's chief financial officer forecast a sequential decline in first-quarter revenue.
Research In Motion Ltd., up $6.79 at $122.58
Strong subscriber growth and demand for smart phones more than doubled the BlackBerry maker's quarterly profit.
Plexus Corp., down $3.74 at $25.64
A run-up in the stock price and expected sales weakness caused an analyst to downgrade the contract electronics manufacturer.