Jan.22 -- Jeremy Grantham, co-founder and chief investment strategist of Boston’s GMO, believes U.S. stocks have become an epic bubble and will burst in a collapse rivaling the crashes of 1929 and 2000. In this interview, he explains why, discusses the futility of Federal Reserve policy, criticizes the state of American capitalism, and shares his thoughts on gold, Bitcoin, emerging markets and climate change. He spoke exclusively to Erik Schatzker on Bloomberg’s “Front Row.”