 The major average is wrapping up a blowout first half of the year on artificial intelligence optimism. The Dow falling 45 points, the Nasdaq down 126, S&P 500 down 22. And billionaire investor Warren Buffett is making a major shift with his charitable giving and said that he plans to cut off donations to the Bill and Melinda Gates Foundation after his death and let his three children decide how to distribute the rest of his wealth.