Developed with SPDR ETFs, Stadion offers the so-called StoryLine investment option for 401(k) managed accounts for participants in the advisor-sold, micro- and small-plan markets.

StoryLine’s dynamic ETF-based managed portfolios offer flexibility beyond what may be available in traditional target-date funds, which are typically overly-focused with strategies that are too rigid. However, as an ETF Strategist, Stadion has built processes designed to adjust holdings in ways that can help respond to shifting market trends.

“Stadion was an early leader in the 401(k) managed account space,” Doherty said, “and the first ETF strategist to implement managed account asset allocation solutions within advisor-sold 401(k) plans. Now this next generation of our managed account service brings a new level of customization that we believe represents a significant improvement over ‘one size fits all’ target date strategies.”

SEE MORE: The Foibles of ETF Expense Ratios

Looking ahead, the Labor Department’s new fiduciary rules could cause advisors specializing in 401(k) plans to steal business away from less specialized providers. The Department of Labor ruling, which raises investment advice standards in retirement accounts, will require more disclosure and customization and will be phased in through the end of 2017.

Stadion’s ETF managed portfolios feature investment strategies concentrating assets into ETFs. Specifically, Stadion’s ETF-based managed portfolios incorporate three major investment themes: tactical, strategic and a hybrid mix. The tactical offerings provide short-term plays to capitalize on investment opportunities that are forming, whereas the strategic play provides long-term allocation across sectors and asset classes. Additionally, the hybrid mix includes a combination of tactical and strategic elements.

According to Morningstar data, there were 755 strategists from 154 firms with $73 billion in assets under management through December 2015.

For more information on ETF Strategists, visit our ETF Strategists Channel.