The desire for safety has investors clamoring for U.S. Treasuries and investment grade corporate bonds -- staples in retirement portfolios -- driving those interest rates lower as well. Roger Aliaga-Diaz, a senior economist at mutual fund giant Vanguard Group, said he expects investment grade bond portfolios to average returns of 2-3 percent for the next 10 years.
"That's scary," Aliaga-Diaz said. "There is no easy way out of this." Low interest rates throw wrench into retirements | StarTribune.com