WASHINGTON, Nov. 17 (Xinhua) -- The U.S. Federal Reserve will require big banks with asset over 100 billion dollars to submit capital plans by nearly next year, according to a Fed guidance issued on Wednesday.

The central bank said that all 19 banks must submit capital plans to show their ability to absorb losses under a set of conditions to be determined by the Fed.

The request is part of the Fed's efforts to step up supervision over the nation's largest financial firms.

Those big banks took a "stress test" under the Treasury Department's plan in early 2009 when the financial crisis was in severe situation.

The Fed also issued on Wednesday a roadmap for banks that want to raise dividends or buy back stock, with regulators saying firms must show they have adequate capital in place to absorb losses and show an ability to satisfy increased capital requirements.

The U.S. government has vowed to control systemic risks in banking sector. President Barack Obama signed the financial regulatory law this summer.