Total U.S. retirement assets were $24.8 trillion as of June 30, 2015, about unchanged from the end of March. The new estimate of $24.8 trillion for March reflects a slight downward revision based on new information. Retirement assets accounted for 36 percent of all household financial assets in the United States at the end of the second quarter of 2015.
Click here to read more. Source: ici.org