The minutes also showed that Fed officials began a review of their exit strategy, which was adopted in June 2011 as they sought to assure investors the central bank had the means to avoid igniting inflation once job growth, wages, and demand started moving up.

While “the broad principles adopted almost two years ago appeared generally still valid,” the minutes showed, the larger balance sheet “suggested a need for greater flexibility.”

Officials disagreed over whether the principles should be formally revised or if they should wait in order to learn more about how the exit might unfold. Bernanke instructed the Fed's staff to study the issue, the minutes said.

Bernanke earlier today said in testimony to the Joint Economic Committee of Congress that the world's largest economy remains hampered by high unemployment and government spending cuts, and raising interest rates or reducing asset purchases too soon would endanger the recovery.

Home Prices

While the economy is expanding, as home price gains and record stock prices help offset federal budget cuts, employment growth still hasn't been sufficient for Fed officials to alter their unprecedented monetary easing.

“It's a moderate recovery, and we're overcoming a record fiscal drag,” Joseph Carson, director of global economic research at New York-based AllianceBernstein LP, which has $453 billion in assets, said before the minutes were released. “We've actually had fairly good growth even during the fear about the fiscal cliff” and the U.S. has experienced “very consistent growth in the labor market.”

Payrolls expanded by 165,000 workers last month, while revisions added a total of 114,000 jobs to the employment count in February and March, Labor Department data show.

Federal Reserve Bank of New York President William C. Dudley said yesterday he hasn't decided whether the central bank's next move should be to increase or decrease bond-buying. “Because the outlook is uncertain, I cannot be sure which way, up or down, the next change will be,” Dudley said in a speech in New York.

St. Louis Fed President James Bullard, who votes on policy this year, said yesterday the central bank should continue the purchases because they're the best available option for policy makers to boost growth that is slower than expected.

Dudley's and Bullard's comments helped lift U.S. stocks to a record. The Standard & Poor's 500 Index advanced 0.2 percent to close yesterday at an all-time high of 1,669.16, extending this year's gain to 17 percent.

Some Fed officials in recent weeks have signaled they favor tapering the quantitative-easing program in the next few months. San Francisco Fed President John Williams said last week that the Fed may want to reduce the pace of its purchases as early as this summer “if all goes as hoped.”

Chicago's Charles Evans said May 20 that he'd like to see monthly employment growth of 200,000 or more for at least six months before judging the labor market substantially improved. Employers have added an average of 173,000 workers a month over the past year.

'Getting Better'

Kansas City Fed President Esther George said May 10 the “employment picture is getting better,” with monthly payroll growth averaging about 200,000 “a positive sign.” George, who has dissented this year against FOMC decisions, also said the central bank's unprecedented stimulus threatens to eventually push up long-term inflation expectations.

While the jobless rate has moved toward the Fed's goal of 5.2 percent to 6 percent, inflation has fallen further from the long-run target of 2 percent, dropping in March to 1 percent from a year earlier, the slowest since 2009, according to the Fed's preferred inflation gauge.

The world's largest economy expanded at a 2.5 percent annualized rate in the first quarter, the Commerce Department said last month. The gain followed a 0.4 percent fourth-quarter advance, the slowest since the first quarter of 2011. The economy will grow 2 percent this year, according to the average of 81 estimates in a May 3-8 Bloomberg survey of economists.

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