Clients of Bank of America’s Merrill Lynch brokerage can no longer buy mutual funds in retirement accounts that charge commissions. Merrill clients who already have mutual funds in a commission-based IRA won’t be forced to sell and can continue to make dividend reinvestments, but after the Department of Labor's fiduciary rule begins to be implemented in April clients won’t be able to add or make changes to their mutual fund positions or make new purchases. Read the original story from The Wall Street Journal.