At $654 billion, Apple is the stock market's heavyweight.
Twitter shares fell to an all-time low on Monday, weighed down by doubts that the popular messaging platform isn't growing fast enough to thrive.
Payments company Square has informed US regulators privately that it is exploring going public with a stock market debut, according to reports Friday.
Shares in PayPal jumped Monday in the first day after being spun off by eBay, with the online payments group seeing a market value higher than its former parent.
Google is already one of the largest companies in the world, and on Friday it made one of the largest stock market moves ever.
Facebook is now bigger than Wal-Mart, at least when it comes to its value on the stock market.
Jack Dorsey would have to give up his post at Square if he's to become CEO of Twitter.
Internet file-storage company Mega Ltd., launched in 2013 by indicted entrepreneur Kim Dotcom, failed Wednesday in a bid to list on New Zealand's stock market.
A new study by Zhi Da, Viola D. Hank Associate Professor of Finance at the University of Notre Dame, shows that the growth rate in industrial electricity usage negatively predicts next one-year stock market returns.