Insider Trading Inquiry Accelerates

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The arrest of a research firm executive on charges that he helped hedge funds obtain improper information about publicly traded companies is the first of what is expected to be a new round of cases related to insider trading.

The arrest Wednesday came on the same day that prosecutors won a major victory in its pursuit of insider trading, as a federal judge ruled that wiretapped conversations could be used in the trial of the former hedge fund manager Raj Rajaratnam. The wiretapped communications form the linchpin of the government’s case against Mr. Rajaratnam and also against about two dozen traders and executives implicated in the investigation.

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Insider Trading Inquiry Accelerates -