Winifred Jiau Pleads Not Guilty to Insider-Trading Charges

``Winifred Jiau, a former consultant to Primary Global Research LLC, pleaded not guilty to conspiracy and securities-fraud charges as part of an insider-trading investigation... Jiau passed tips on Nvidia Corp. and Marvell Technology Group Ltd. to the two men, according to the indictment. She was paid as much as $10,000 a month in return. Jiau, who is being held in a federal jail in Manhattan, was originally charged Dec. 29 in a criminal complaint. ''