Visium Trader-Turned Whistle-Blower Tied to Hedge Fund’s Demise

  • Thorell said to go to U.S. authorities, record conversations
  • Brokers at Janney, PrinceRidge said to aid alleged scheme

A former trader at Visium Asset Management LP told an ex-colleague that one of his first stops after leaving the firm was the SEC. What he didn’t say was that he had turned on his former co-workers and was secretly recording their conversations for the FBI.

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