Updated

The Supreme Court heard arguments in a major case involving Intel's 401(k) plan over allegations of underperformance tied to private fund investments, with justices' questioning offering clues about how they might rule. The case comes as employers await new Labor Department rules governing the use of private investments within retirement plans. A ruling could significantly affect how companies structure retirement plan offerings and their legal exposure to fiduciary-duty claims, with broad implications for the retirement industry and millions of 401(k) participants.