Here’s what’s been happening on Wall Street overnight

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Facebook CEO Mark Zuckerberg will testify about the Cambridge Analytica data leak before congressional committees beginning on Tuesday.

His appearance comes amid increasing calls for new regulations to protect consumer privacy and limit the power and influence of Facebook and other tech giants. Here’s the latest:

In other news, T-Mobile and Sprint are soaring after a report says they have resumed merger talks. And activist investor Carl Icahn said on Tuesday he was selling auto parts maker Federal-Mogul to Tenneco Inc in a $US5.4 billion deal.

In markets news:

Lastly, I’m excited to welcome Dakin Campbell to Business Insider as a senior Wall Street reporter.

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