Buffett talked about U.S. trade, the stock market and his own future at Berkshire Hathaway's annual shareholder meeting. Here are the highlights.

"You're losing one of the most esteemed investors one could argue of all time," a source said of investors' reaction to Buffett's plan to step down.

Berkshire Hathaway’s board of directors has voted unanimously to appoint Greg Abel as chief executive, with Warren Buffett remaining chair of the group he built from almost scratch into a $1.2tn conglomerate.