Hearing a case of a 401(k) investor from Dallas who claimed his employer failed to execute an order, costing him $100,000, U.S. Supreme Court justices on Monday questioned business group arguments that 401(k) investors can only contest mismanagement of the plans through class-action lawsuits, Bloomberg reports.

If the court rules in James LaRue’s favor, it could pave the way for 70 million defined contribution investors throughout the nation with $3.3 trillion in assets to forge their own lawsuits.

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