Moderna closed up 8.7 percent, its biggest one-day gain since December.

Musk: Getting a GPU (graphics card) is much harder than getting drugs.

CVR Energy said a fire at a refinery in Oklahoma had been extinguished.

Asked whether India was an option for a factory Tesla was "interested in," Musk said "absolutely."

Musk: Advertising agency lifts warning on Twitter.

Musk: If you are lucky, Twitter may start to make money next month.

Nvidia (NVDA.O) is integrating AI enterprise software into Microsoft (MSFT.O ) Azure.

Swiss court: Credit Suisse drops appeal in AT1 bond writedown case, says writedown does not apply to bonuses.

White House: Both parties reiterated that they will not default on their debts.

White House: US President Joe Biden and House Speaker McCarthy had a productive meeting on Monday.

Musk said he has no plans to endorse any particular candidate.

McHenry, Chairman of the Financial Services Committee of the US House of Representatives: It is impossible to determine when (debt ceiling) negotiations will resume.

"We still have major differences on spending," McHenry, chairman of the U.S. House Financial Services Committee, said of the debt ceiling talks.

McCarthy, Speaker of the US House of Representatives: We had a very good discussion, and we know where each other is currently.

US House Republican negotiator Graves: The option of spending cuts is not ruled out.

Punchbowl reporter: US House Speaker McCarthy said that no talks have been scheduled with US President Joe Biden, but our staff is continuing the dialogue.

Goldman Sachs analyst David Kostin: Expect the S&P 500 to fall to 4,000.