LINDA WERTHEIMER, host: NPR's business news starts with an insider trading probe.</s>LINDA WERTHEIMER, host: Federal prosecutors have charged a seventh person for conspiracy and securities fraud in a widening investigation. Winifred Jiau is a consultant for what's known as an expert-network company. These firms, including several in California, are the focus of the investigation. Prosecutors say the companies are illegally providing inside information about technology companies to big investors.
Federal prosecutors have charged a seventh person for conspiracy and securities fraud in a widening investigation. Winifred Jiau is a consultant for what's known as an expert-network firm. Those firms are the focus of the investigation. Prosecutors say the companies are illegally funneling inside information about technology companies to big investors.