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."
Sens. 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.
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.
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.