The health care giant's shares are down more than 50% in the last month. That's hurting the powerful U.S. stock-market index.

The health care conglomerate is facing mounting financial problems – and ongoing consumer anger over high costs and denied claims.

The billionaire investor, now 94, also said he would be resigning as CEO at the end of the year. He spoke at Berkshire Hathaway's annual shareholder meeting known as "Woodstock for Capitalists."

Senators Adam Schiff and Ruben Gallego have asked for "an urgent inquiry" into whether President Trump or others engaged in insider trading on advanced knowledge of his tariff policy changes.

Investors, businesses and consumers all seem terrified of how President Trump's tariffs could upend the global economy.

Shares tumbled in Europe and Asia and U.S. futures tumbled Thursday following U.S. President Donald Trump 's announcement of big increases in tariffs on imports of goods from around the world.

Tariffs are roiling stock markets — but making gold hotter than ever.

Business leaders are trying to engage in a delicate diplomacy with the White House — even as their companies brace for the impact of market volatility and tariffs.

Trump has long boasted about the market's performance under him. But now he seems to have other priorities.

U.S. stock markets plummeted on Tuesday morning as a new global trade war began.

The Chinese AI company may be about to burst Silicon Valley's bubble.

The world's richest man, who has run afoul of regulators before, is in their sights again as he tries to buy Twitter. It's raising questions about the SEC's ability to police the rich and powerful.