Facebook

Facebook founder Mark Zuckerberg announced that his social network has reached one billion users. About 600 million of those users connect through mobile devices. This milestone was actually reached on September 14 but Zuckerberg has revealed it only yesterday in an interview with “The Today Show” and the magazine Bloomberg Businessweek.

Yesterday, Facebook’s shares for the first time fell below $20. Their value at the the social network’s IPO on May 17 was $38, this means that in just over two months it has almost halved.

Facebook’s shares simply can’t seem to be succeessful and on Tuesday they closed at $31, 18% less than their $38 initial offer from last Friday. After a lot of speculations, however, it looks like there will also be an official investigation by the Securities and Exchange Commission (SEC) – the authority that monitors the stock market – and the Financial Industry Regulatory Authorithy (FINRA), a private organization that however has some authority in the management of financial exchanges.