The U.S. economy and population have grown at a faster rate than the U.K.’s in the years since independence, with higher stock returns, better bond yields, and lower inflation, according to Bank of America’s chief investment strategist, Michael Hartnett. Hartnett titled his latest weekly “Flow Show” note “Red, White and Boom.” He calculates that nominal gross domestic product has grown at an average annual rate of six percent in the U.S., beating the UK’s average growth of 5.8 percent.