Zuckerberg loses $16.8 billion after shares drop more than 20 percent

Facebook CEO Mark Zuckerberg lost $16.8 billion on Wednesday, about one fifth of his net worth, after the company’s shares dropped over 20 percent in the post-market trading on its poor earnings, reported Bloomberg.

The operating profit margin fell to 44 percent in the second quarter from 47 percent a year ago.

Adding to the worries was a statement from the company executive predicting that the margin will sink to the "mid-30s" for more than two years due to the costs of improving privacy safeguards and slowing usage in the biggest advertising markets.