U.S. retirement assets rose 1 percent to $20.9 trillion in thesecond quarter of 2013, according to the Investment CompanyInstitute.

The data encompasses assets held in IRAs, defined contributionand defined benefit plans, government plans and annuityreserves.

At the end of June, retirement savings accounted for 34 percentof all household financial assets in the United States.

Assets in individual retirement accounts totaled $5.7 trillionat the end of the second quarter of 2013, an increase of 0.9percent from the end of the first quarter. Defined contributionplan assets rose 1 percent in the second quarter to $5.3 trillion,with $3.8 trillion of that in 401(k) plans.

Those figures are relatively unchanged from $5.3 trillion and$3.7 trillion, respectively, as of March 31, 2013. Mutual fundsmanaged $3.1 trillion, or 58 percent, of assets held in 401(k),403(b), and other DC plans at the end of June.

Government pension plans — including federal, state, and localgovernment plans — held $5.2 trillion in assets as of the end ofJune, a 1.4 percent increase from the end of March. Private-sectordefined benefit plans held $2.8 trillion in assets at the end ofthe second quarter of 2013, and annuity reserves outside ofretirement accounts accounted for another $1.8 trillion.

As of June 30, target date mutual fund assets totaled $540billion, an increase of 2.1 percent in the second quarter.Retirement accounts held the bulk of target date mutual fundassets: 90 percent of target date mutual fund assets were heldthrough DC plans and IRAs.