Stock market network reveals investor clustering
Twitter takes hit as user growth disappoints (Update 2)
Twitter got a reality check Wednesday as the high-flying messaging company reported modest user growth during a quarter in which it lost $511 million.
Study finds evidence that stock prices can be predicted within a short window of time
A new study from the University of Iowa shows evidence that stock price movements are, in fact, predictable during short windows.
Apple's next big thing may be lower-priced iPhone (Update)
Apple's much-anticipated update to its line-up of iPhones may leave the impression that the technology pioneer's focus has shifted to making more affordable products than engineering innovative breakthroughs.
Leading 3-D printer firms to merge in $403M deal (Update)
Stratasys, a leading maker of 3-D printers, is buying another 3-D printer manufacturer, MakerBot, for $403 million in stock.
High-frequency trading tactic lowers investor profits
High-frequency trading strategies that exploit today's fragmented equity markets reduce investor profits overall, according to new findings by University of Michigan engineering researchers. The study is believed to be the ...
Yahoo takes big leap with $1.1B deal for Tumblr (Update 3)
Yahoo's CEO is making a $1.1 billion bet on the online blogging forum Tumblr as Marissa Mayer tries to make a former Internet icon cool again.
Google chairman to sell $2.5 bn of shares
Google's Chairman Eric Schmidt plans to sell 3.2 million "A" shares, currently worth $2.5 billion, over the next year, Google said Friday in a filing with the Securities and Exchange Commission.
Photovoltaics beat biofuels at converting sun's energy to miles driven
In 2005, President George W. Bush and American corn farmers saw corn ethanol as a promising fossil fuel substitute that would reduce both American dependence on foreign oil and greenhouse gas emissions. Accordingly, the 2005 ...
Hedge funds manipulate stock prices, new research shows
(Phys.org)—Some hedge funds manipulate stock prices at the end of the month to improve the returns that they report to their investors, a new study suggests.
Predicting what topics will trend on Twitter
Twitter's home page features a regularly updated list of topics that are "trending," meaning that tweets about them have suddenly exploded in volume. A position on the list is highly coveted as a source of ...
Facebook guards hacker mentality to stave off complacency
Facebook Inc. is on the outs with investors, and the tumbling stock price has dented employees' morale and personal net worth. But at 1 Hacker Way, there's no stopping the hacker culture - or the hackathon.
Groupon launches payments service in US (Update)
Groupon launched a payment service Wednesday that allows businesses to accept credit cards using an iPhone or iPod Touch, becoming the latest company to enter the growing mobile payments market.
Silicon Valley isn't sharing Facebook's misery (Update)
Silicon Valley, it turns out, doesn't revolve around the stock prices of Facebook and its playful sidekick, Zynga.