CNBC Top Stories

A British businessman is being labeled a "super spreader" of COVID-19, the virus formerly known as coronavirus. There are a variety of factors, both behavioral and biological, that determine super spreaders. Here's what epidemiologists want the public to know about super spreaders, plus the best strategies you can use to protect yourself from viruses like COVID-19.

See which stocks are posting big moves after the bell.

Smollett is again facing charges in connection with a 2019 Chicago police report in which he claimed he was the victim of a racist and homophobic hate crime.

Rising mortgage and credit card balances fueled the biggest increase in household debt since 2007.

Pivotal Research Group analyst Michael Levine said part of Facebook's advertising business "just feels very unsustainable."

President Donald Trump's ally Roger Stone was convicted of lying to Congress about his contacts with WikiLeaks and witness tampering.

Lyft reported earnings for its fourth quarter of 2019 Tuesday that beat analyst estimates on revenue and active riders.

"I don't see Joe getting the nomination, but he's the best bet the Democrats have," former House Speaker Paul Ryan said Tuesday.

Boeing said it has begun flying a 737 Max plane with new software as a test to see how the plane functions when it is operated as a Max would be in an airline fleet

The U.S. Federal Aviation Administration says it should have done a better job of ensuring Southwest Airlines had certified completion of maintenance on 88 used Boeing 737 jets, as noted in a report by the U.S. Transportation Department's Inspector General seen by Reuters ahead of its release.

The number of confirmed cases rose to more than 43,100 across the world with deaths topping at least 1,018 as of Tuesday morning.

However, the New York Knicks, the team with the worst record in the 2018-19 season, has the highest valuation on the Forbes list at $4.6 billion.

LinkedIn's Opportunity Index 2020 reveals where people feel their job prospects are most promising.

Under the Trump administration, the Pentagon's budget has swelled from $670 billion in 2018 to $712 billion in 2020.

The NBA says they are using machine learning to create more highlights than ever before this All-Star weekend.

Google and its parent company, Alphabet, are counting on new businesses as growth slows in its core digital advertising business.

NASA is asking Congress for a $25.2 billion budget next year, a 12% increase from last year.

S&P 500 and Nasdaq eke out fresh record closing highs

Airbnb isn't expected to go public until the third quarter of this year.

The S&P 500 and Nasdaq Composite were up slightly on Tuesday as investors digested testimony from the top U.S. central banking official.