DELL Dell Inc. (MM)

By Dan Strumpf

NEW YORK--Federal prosecutors filed new charges Tuesday against employees at three hedge funds accused of making improper trades on inside information.

The new charges relate to short sales of NVIDIA Corp. (NVDA) stock in April and May 2009. Those charged Tuesday were Todd Newman, a former portfolio manager with hedge-fund firm Diamondback Capital Management; Anthony Chiasson, a former hedge-fund manager at Level Global Investors LP; and Jon Horvath, a technology analyst with SAC Capital Advisors LP's Sigma Capital Management division.

The new charges broaden the case against Messrs. Newman, Chiasson and Horvath, who were originally charged in January with engaging in a "criminal club" that prosecutors said netted more than $61.8 million through improper trades of NVIDIA and Dell Corp. (DELL) stock.

All three men had pleaded not guilty to the original charges in February.

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