Morningstar

The leaders raked in a combined $949 billion over the past decade.

Secretary of Labor Eugene Scalia said retirement plans aren’t for “furthering social goals or policy objectives that are not in the financial interest of the plan.”

Here's how the largest groups have fared during unprecedented market activity.

The funds had posted gains over the past decade, but have suffered losses amid this year's coronavirus-driven volatility.

Still, clients continue to invest their assets into the industry’s cheapest funds and are saving billions as a result.

"It's now June and if you’ve been on a deserted island for the last five months you couldn’t have fathomed the movements we’ve seen," an expert says.

The decade’s top performers also outpaced broader markets over the short term.

The results were “not just predicated on expense ratios,” an expert says.

“Just because someone’s charging 1% doesn’t mean you should take them off your list,” an expert says.

Even some of the industry’s cheapest products “may be overpriced” in that they’re “mirroring a passive index,” an expert says.