The financial implosion of Enron late last year has brought increased scrutiny to the regulations that govern 401(k) plans. Now, some say the longstanding issue of portfolio disclosure might be next.

A handful of rule proposals that would force fund companies and portfolio managers to disclose their stock holdings more frequently have gone largely ignored for months. But in recent weeks those issues are getting renewed interest from research groups and consultants who say that shareholders are better served knowing more about the stocks in their portfolios.

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