Assets at firm's Total Return Fund have slipped 70% from its peak in April 2013 to $82.6 billion.
The agency also proposed a rule to permit cities to create their own savings plans.
The lawsuit highlights a friction that exists at financial-services firms that put employees into their own product.
Theres a wide disconnect between 401(k) participants and their retirement goals.
A measure of volatility for bonds has moved significantly higher than volatility in equities. What does this mean for U.S. stocks?