What you need to know on Wall Street today

Over the past few years we've seen Mark Zuckerberg everywhere. We saw him jogging in Beijing. We saw him visit a dairy farm in Wisconsin. And we've heard his thoughts on immigration and education.

But as revelations surface about how the personal information of 50 million Facebook users was stolen and exploited during America's 2016 presidential election, the 33-year-old founder and CEO of the social network has been mum. Ditto for Facebook COO Sheryl Sandberg, the company's second in command.

Where in the world is Mark Zuckerberg, asks Business Insider's Alexei Oreskovic.

Elsewhere in Facebook news:

• The feds are reportedly investigating Facebook after the Cambridge Analytica scandal
• The CEO of Cambridge Analytica was secretly filmed offering to entrap politicians with bribes and sex workers
• Facebook's stock structure gives Mark Zuckerberg a blank check - investors were OK with that, but the world can't afford to be
• How to stop your Facebook friends from giving away your data

Elsewhere in tech news, DocuSign has reportedly filed confidentially for an IPO. And shares of MuleSoft, were briefly halted on Tuesday after Reuters reported that the company is in advanced talks to sell itself to Salesforce.