The computer network that runs one of the world's largest security exchanges has been hacked repeatedly, according to a newspaper report.
The Wall Street Journal is reporting the FBI and Secret Service are on the hunt for hackers who have made their way into the system that runs the NASDAQ Stock Market. NASDAQ, the National Association of Securities Dealers Automated Quotations, is the second-largest trading market in the world.
In 1999, a group of hackers called "United Loan Gunmen" were able to infiltrate websites for NASDAQ and the American Stock Exchange. At the time, the case was considered one of the largest hacking crimes in U.S. history. The true identity of the group remains an enigma.
A person involved in the 2011 NASDAQ investigation told the WSJ that "so far the perpetrators appear to have just been looking around."