Schering-Plough a Big Market Mover

NYSE

Schering-Plough Corp., up $1.31 at $15.17

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 5 cents at $10.91

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 19 cents at $12.59

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 91 cents at $19.63

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 $2.60 at $73.79

Production issues caused the solar power wafer maker to lower its first-quarter revenue outlook below expectations.

NASDAQ

Garmin Ltd., down $1.55 at $54.86

The personal navigation device maker's chief financial officer forecast a sequential decline in first-quarter revenue.

Research In Motion Ltd., up $7.69 at $123.48

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.