Dazzling Twitter debut sends stock soaring 73 pct

Shares of Twitter went on sale to the public for the first time Thursday, instantly leaping more than 70 percent above their offering price in a dazzling debut that exceeded even Wall Street's lofty hopes.

Knight Capital's software snag causes big 3Q loss

The Knight Capital Group Inc. trading firm said it lost $764.3 million in the third quarter because of a software glitch that flooded the stock market with trades one day in August, causing dozens of stocks to fluctuate wildly.

Want a piece of Facebook? Get in line

Facebook may be the year's hottest stock issue -- but try getting a piece of it. Small investors will find the line long and hurdles high to get even a handful of shares.

TD Ameritrade data theft settlement nears approval

(AP) -- The settlement over contact information stolen from online brokerage TD Ameritrade Holding Corp. is nearing approval, but the more than 6 million current and former customers affected will have to wait a little while ...

TD Ameritrade to buy Scottrade in $4B cash-and-stock deal

Online brokerage TD Ameritrade is buying Scottrade in a $4 billion cash-and-stock deal that would tie up two major players in the day trading industry during an era when an increasingly large number of investors are choosing ...

No wide data breaches at firms in cyberattack

Federal prosecutors in New Jersey have provided new details on how an international cybercrime ring broken up this week accessed some customer accounts at more than a dozen leading financial institutions and payroll services.

US payroll, financial firms hacked; eight charged (Update)

U.S. prosecutors announced fraud and other charges Wednesday against eight alleged members of an international cybercrime ring that the government said hacked into the computers of more than a dozen leading financial institutions ...

Knight Capital jumps on Getco buyout offer

Four months after a major software malfunction at Knight Capital Group roiled markets and threatened the company's survival, a rival trading firm stepped in with an offer to buy Knight at a steep premium.