stock market
Many China-listed companies hit their 10 percent downside limits, and only a handful saw their share prices rise.
As the company's business model shifts, Twitter's stock drops to its lowest point yet.
Or was he just giving the finger to the markets?
WHAT'S HAPPENING
Shares hit a record high after the tech behemoth trumpeted gains for Youtube.
George Soros, the billionaire hedge-fund manager who has broken the British pound and some Republican hearts, is betting that the U.S. stock market could break, too.