Millennials’ already stretched finances could face a new stress: slower growth of the U.S. economy. Compared with their parents, today’s younger workers may need to save more of their income for retirement, according to a new NerdWallet report. A number of analysts predict that the continuing pattern of slower growth that has taken hold since the Great Recession could cause stock market returns to fall from 7%, the annual average since about 1950, to a possible 5% in the decades to come.Read more on NewsOK.com