CNBC Top Stories

A coalition of health and industry partners is looking at convalescent plasma as a potential treatment for the coronavirus, Mayo Clinic CEO Dr. Gianrico Farrugia told CNBC on Tuesday.

Toast was valued at almost $5 billion in a financing round last month and is now cutting about half its staff.

Check out the companies making headlines after the bell.

"I don't want to risk it. I think America doesn't want to risk it," CNBC's Jim Cramer said Tuesday, regarding quickly reopening the U.S. economy.

Patients and doctors who routinely need hydroxychloroquine now fear people hoarding the drug will prevent them from getting it.

Video game stocks, particularly industry juggernauts Activision Blizzard and Take-Two Interactive, are in a bullish technical and fundamental position with millions staying at home, traders say.

Stocks were rising on hopes the number of new virus cases may be abating, but the rally lost steam late in the day.

Square and Twitter CEO Jack Dorsey has said he is donating $1 billion in Square equity to support relief efforts for the COVID-19 efforts.

Some small businesses may not benefit from the Paycheck Protection Program's forgivable loans as much as they think.

Members of the coronavirus task force are expected to hold a press briefing Tuesday, in what has become a daily affair as the pandemic continues to claim lives.

"The business of G Suite is growing at an incredibly healthy and, frankly for me, surprising rate," Javier Soltero, vice president and general manager of G Suite at Google, told CNBC in an interview on Tuesday.

"The virus is not going to go away until we have a vaccine, so we're always going to have to find strategies to deal with this, to prevent the next wave," said Johns Hopkins University's Dr. Robert Bollinger.

Stocks gave up gains late Tuesday. Three market experts say equities are not yet in the all-clear.

Stocks built on the strong gains from the previous session as investors grew more optimistic about a decline in new coronavirus cases.

Airbnb guests who spoke with CNBC said they've had difficulty navigating Airbnb's website to collect the full cash refunds the company has said they are eligible for.

Broad testing of people for the coronavirus as was done in South Korea could slow the spread of COVID-19 in some parts of the United States, an infectious diseases expert said.

Congress late last month approved a $350 billion small business loan program as part of a more than $2 trillion stimulus bill aimed at helping the economy recover from the coronavirus pandemic.

Allstate CEO Thomas Wilson said driving began to fall dramatically beginning in the third week of March and is down around 35% to 50% depending on the state. "People stopped driving pretty much on their own," he told CNBC.

Netflix added more controls for parents that allow them to limit the content their kids are watching by TV or movie rating. Parents can lock profiles and also block certain TV shows or movies entirely.

Shopping center owner Kimco Realty has taken matters into its own hands to try to help small-business owners get access to funds that can help them pay rents.