Federal Reserve Chairman Ben S. Bernanke probably will show how the central bank will exit the biggest monetary expansion in history when he reports to Congress next week, economists said.

The Fed pumped $1 trillion into the banking system over the past year through bond purchases and emergency loans, doubling assets on its balance sheet. Reassuring investors that inflation won't exceed forecasts once the recession ends will give the Fed more credibility, said Dean Maki, chief U.S. economist at Barclays Capital Inc. While policy makers have spoken about specific tools they may use, they haven't laid out a strategy.