(Reuters) - The Nasdaq is planning to revamp its systems for handling stock offerings after acknowledging that technology problems had affected trading in millions of newly issued Facebook shares on Friday, the Wall Street Journal reported. Individual investors were left in the dark for hours on Friday about whether their buy and sell orders for Facebook shares had actually been executed, in the latest of a series high-profile exchange glitches. ...

(Reuters) - The Nasdaq is planning to revamp its systems for handling stock offerings after acknowledging that technology problems had affected trading in millions of newly issued Facebook shares on Friday, the Wall Street Journal reported. Individual investors were left in the dark for hours on Friday about whether their buy and sell orders for Facebook shares had actually been executed, in the latest of a series high-profile exchange glitches. ...

(Reuters) - Yahoo Inc said it is to sell up to half of its stake in Internet entrepreneur Jack Ma's Alibaba Group back to the Chinese company for $7.1 billion, and hand most of the sale proceeds to its shareholders. The deal caps years of discussions between the two companies over Alibaba reclaiming some or all of the 40 percent stake in the Chinese e-commerce firm that Yahoo bought for about $1 billion in 2005. Under the agreement, Yahoo will sell half of that stake in Alibaba for at least $6.3 billion in cash and up to $800 million in new Alibaba preferred stock. ...

NEW YORK (Reuters) - Newly issued shares in Facebook Inc may have a hard time in the coming week if lead underwriter Morgan Stanley stops supporting the stock and managers lower down in the IPO book who were hoping for an early surge decide to get out before going underwater. Facebook on Friday sold 421 million shares of stock in a deal that valued the company at more than $100 billion. But investors, expecting a first-day pop in price, instead saw it close just 0.6 percent above the IPO price at $38.23. ...

TOKYO (Reuters) - Markets recovered some ground on Monday after heavy losses last week, but investors remained wary about the euro zone despite world leaders calling for Greece to stay in the monetary union and for Europe to balance austerity with growth. G8 leaders meeting at the weekend vowed to take all necessary steps to combat financial turmoil and revitalize a global economy increasingly threatened by Europe's debt crisis, but they offered no specific prescription for debt-crippled Greece which holds fresh elections next month. ...

Twenty-two states and the District of Columbia are backing Montana in its fight to prevent the U.S. Supreme Court's 2010 Citizens United decision from being used to strike down state laws restricting corporate campaign spending.

NEW YORK (Reuters) - Newly issued shares in Facebook Inc may have a hard time in the coming week if lead underwriter Morgan Stanley stops supporting the stock and managers lower down in the IPO book who were hoping for an early surge decide to get out before going underwater. Facebook on Friday sold 421 million shares of stock in a deal that valued the company at more than $100 billion. But investors, expecting a first-day pop in price, instead saw it close just 0.6 percent above the IPO price at $38.23. ...

(Reuters) - A pledge by leaders of industrialized nations to help the troubled world economy is unlikely to herald quick new action by Europe on its debt crisis, meaning more uncertainty for nervous financial markets. The Group of Eight economies stressed on Saturday that their "imperative is to promote growth and jobs", as they also recognized problems among European banks and gave verbal backing for Greece to stay in the euro. Still, despite U.S. calls for immediate moves to boost growth, no sign emerged that Germany would soften its stance on austerity as the cure for Europe's debt ...

Pakistan restored access to Twitter after briefly blocking the microblog over "blasphemous" posts about a Facebook competition involving caricatures of the Prophet Mohammed.

On paper at least, European leaders agree: They need stronger growth measures to help their economies expand out of their 2½-year-old government debt crisis. Figuring out exactly what those new steps might be will be the hard part.

SAN FRANCISCO (Reuters) - The chief executives of Apple Inc and Samsung Electronics Co Ltd are used to running the show at their global tech empires, but they will be in for a different experience when they arrive at a San Francisco federal courthouse on Monday. Apple's Tim Cook and Samsung's Choi Gee-sung, whose companies are embroiled in bitter patent litigation, have been instructed by a federal judge to appear for court-supervised mediation. A joint court filing in April said that "as directed by the Court, Apple and Samsung are both willing to participate" in the discussions. ...

SAN FRANCISCO (Reuters) - The chief executives of Apple Inc and Samsung Electronics Co Ltd are used to running the show at their global tech empires, but they will be in for a different experience when they arrive at a San Francisco federal courthouse on Monday. Apple's Tim Cook and Samsung's Choi Gee-sung, whose companies are embroiled in bitter patent litigation, have been instructed by a federal judge to appear for court-supervised mediation. A joint court filing in April said that "as directed by the Court, Apple and Samsung are both willing to participate" in the discussions. ...

"The Avengers" continues to muscle out everything else Hollywood throws at it, easily sinking naval rival "Battleship" and other new releases.

Facebook begins selling stock to the public Friday in the most talked-about market debut in years. Two Associated Press business writers are debating whether the stock is a smart buy.

Facebook begins selling stock to the public Friday in the most talked-about market debut in years. Two Associated Press business writers are debating whether the stock is a smart buy.

When Dan Fitzsimmons looks across the Susquehanna River and sees the flares of Pennsylvania gas wells, he thinks bitterly of the riches beneath his own land locked up by the heated debate that has kept hydraulic fracturing, or fracking, out of New York.

(Reuters) - Shares in social media company Facebook Inc could fall below the initial public offering price of $38, Barron's wrote in its May 21 edition. Facebook saw its shares rise a scant 0.6 percent to $38.23 on Friday in the first day of trading. The stock stayed above the $38 IPO price, supported in the market by the deal's underwriters. But Barron's said the "big question" this week will be whether they continue to do so. ...

NEW YORK (Reuters) - Normally a big decline would set up Wall Street for a technical rebound. But that may not be the case this week, even after the market posted its worst weekly loss for the year and the S&P fell for six straight sessions. With the corporate earnings season drawing to an end and recent U.S. economic data raising doubts about the pace of growth, the S&P 500, which is down 7.3 percent so far in May, could decline further this week as concerns about the financial health of Europe persist. ...

Mark Zuckerberg got married, everyone! A day after taking Facebook public, Zuck tied the knot with his longtime girlfriend Priscilla Chan and announced it the only way he knows how: through his Facebook timeline.