The Federal Reserve could end up buying more than the $600 billion in government bonds it has committed to purchase if the economy fails to respond or unemployment stays too high, Fed Chairman Ben Bernanke said.

In a rare televised interview, Bernanke told the CBS program "60 Minutes" the Fed's actions are aimed at supporting what is still a fragile economic recovery, dismissing critics who argue the policy will lead to future inflation.

"This fear of inflation I think is way overstated," Bernanke said in the interview aired on Sunday. "What we're doing is lowering interest rates by buying Treasury securities," he said. "And by lowering interest rates, we hope to stimulate the economy to grow faster. The trick is to find the appropriate moment when to begin to unwind this policy. And that's what we're going to do."

Asked if the central bank could go beyond the $600 billion of bond buys announced at its November meeting, Bernanke said: "Oh, it's certainly possible. It depends on the efficacy of the program. It depends, on inflation. And finally it depends on how the economy looks," he said.

http://www.reuters.com/article/idUSTRE6B50D020101206