A judge said Wednesday Lehman Brothers Holdings Inc. could probe whether Barclays PLC got a "windfall" worth billions of dollars when it bought Lehman's broker-dealer business in 2008.

Judge James Peck of the U.S. Bankruptcy Court in Manhattan gave Lehman the power to subpoena documents and witnesses so that it can investigate a deal that was cobbled together a week after the investment bank collapsed last September.

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