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Apple Inc's quarterly results again smashed Wall Street's expectations, fueled by record iPhone and Mac sales, offsetting lower-than-expected sales of its iPad tablet computer.

Kenneth T. Robinson took tips about corporate mergers from one friend and passed them to another for 15 years. He knew he should walk away. But he says he just couldn't stop trafficking in insider-trading tips.

The parent company of the New York Stock Exchange said Sunday that it rejected an $11.3-billion bid from Nasdaq and IntercontinentalExchange to buy the company.

The Securities and Exchange Commission unveiled a long-awaited plan designed to protect the markets from volatile price swings following the May 6 "flash crash."

Nasdaq's late-night rebalancing of its benchmark Nasdaq-100 Index spurred volatility in Apple shares as its weighting is slashed, and surprised U.S. fund managers who questioned the timing of the announcement.

The blue chips kicked off the second quarter with solid gains on optimistic economic data after capping the best first quarter in more than a decade.

Stocks started the week with big gains Monday on a major telecommunications deal and signs that Japan's nuclear crisis was stabilizing. The Dow Jones industrial average closed above 12,000 for the first time since a nuclear power plant in Japan failed following a massive earthquake and tsunami....

Billionaire investor Warren Buffett said on Monday that Japanese stocks were good investments after the deadly earthquake that hit the world's third-biggest economy last week.

Nasdaq OMX Group Inc.'s potential hostile bid for NYSE Euronext would face substantial antitrust questions in the U.S., where it would merge two direct competitors and create a monopoly in the market for corporate listings, according to antitrust lawyers.

The company behind the Angry Birds mobile phone game sensation wants to list on the stock market.