The FBI says it has enough informants lined up to keep its investigations of suspected illegal insider trading at hedge funds going for at least five more years. In a briefing on Monday with reporters at the New York office of the Federal Bureau of Investigation just blocks away from Wall Street, agents who manage squads of investigators likened the probes to penetrating a secret society. http://www.reuters.com/article/2012/02/27/insidertrading-hedgefunds-fbi-idUSL2E8DR9YV20120227