Can you borrow from an IRA, 401(k) or Roth IRA to invest in a rental property or a business? — Bob H.

It can be tempting to borrow money from your retirement funds, but it's usually not a good idea, warns Frank deNapoli, senior vice president at Winslow, Evans & Crocker in Peabody, Mass. "You're shortchanging your retirement," he says.