FILE - The sign outside the NASDAQ Market site is seen in this Aug. 19, 2004 file photo taken in New York. The Wall Street Journal reported on its website late Friday Feb. 4, 2011 that federal investigators are trying to identify the hackers that penetrated the market's computer network multiple times during the past year.   (AP Photo/Kathy Willens, File)

Photo by: KATHY WILLENS

FILE - The sign outside the NASDAQ Market site is seen in this Aug. 19, 2004 file photo taken in New York. The Wall Street Journal reported on its website late Friday Feb. 4, 2011 that federal investigators are trying to identify the hackers that penetrated the market's computer network multiple times during the past year. (AP Photo/Kathy Willens, File)