“Father Time always wins,” the 96-year-old, who turned Berkshire Hathaway into an investing powerhouse, said in a letter to shareholders. He will remain on the board as chairman emeritus.

The Federal Reserve is trying to catch up with the leap in bond rates as the Middle East conflict unnerves world markets.

The president seems driven chiefly by the sense that A.I. is the way to economic growth, and nothing can be allowed to stand in its way.