Warren Buffett: 'US economy is slowing down, but I'm not concerned'

"It does look like the pace of increase in the economy has slowed down," the chairman and CEO of Berkshire Hathaway said in an interview with CNBC. "I would call it somewhere close to noticeably, but I would not go beyond that." He noted that a slowdown in BNSF, the railroad company owned by his holding company Berkshire, was displaying signals of slower growth but added some of the data may be distorted by seasonal factors, such as the weather. However, Buffett said he is not concerned either way and that it would not change the way he invests. He added: "It does look like it is s...