Zuckerberg's wealth falls by $4 bn after Facebook posts slowest-ever growth

Facebook CEO Mark Zuckerberg's wealth fell by more than $4 billion on Thursday as the company's shares declined by almost 6%. The decline came a day after Facebook posted its slowest-ever quarterly revenue growth of 25%. As of Thursday, Zuckerberg was left with an $81-billion fortune, still retaining his spot as the world's fifth-richest person on the Bloomberg Billionaires Index.