Cautious of practices like market timing and late trading, retirement plan providers are performing complete security checks of the mutual funds they entrust their investments to, Pensions and Investments reports .

Leading the way is the $1.9 billion Maryland Supplemental Retirement Agency in Baltimore, which devised a set of questions to ask mutual fund companies on market timing, late trading and other related activities. Michael Halpin, executive director at Maryland Supplemental, which runs the state's defined contribution plans, said the questions helped "open the discussion with our current investment providers."

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