Stock market model first to reproduce main properties of the real market
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.
Google profits surge on growing ad revenue (Update)
Google on Thursday reported a surge in quarterly profit to $2.79 billion on the back of rising online advertising revenue, beating Wall Street expectations.
Yahoo's $7.1B deal with Alibaba offers ray of hope
After years of mortifying missteps, Yahoo Inc. finally has something to boast about: a multibillion-dollar windfall from a savvy investment in China.
Spurious switching points in traded stock dynamics
Physicists have rebuffed the existence of power laws governing the dynamics of traded stock volatility, volume and intertrade times at times of stock price extrema. They did this by demonstrating that what appeared as "switching ...
Using Twitter to predict financial markets
A University of California, Riverside professor and several other researchers have developed a model that uses data from Twitter to help predict the traded volume and value of a stock the following day.