Robert Hockett, a Law Professor at Cornell University, and Tom Schoenberg, a Bloomberg Justice Department reporter, discuss federal prosecutors issuing subpoenas to several large banks as part of a criminal investigation into possible manipulation of the U.S. Treasuries market. UBS Group AG, BNP Paribas SA and the Royal Bank of Scotland Group Plc received subpoenas last month seeking information on the $14 trillion market. They spoke with June Grasso and Greg Stohr on "Bloomberg Law."

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