The Federal Reserve has said many times that it wants to keep interest rates low for a long time. On Tuesday and Wednesday, the central bank’s interest-rate-setting committee will meet with Janet Yellen, the new chairwoman, to finalize a policy statement and update economic forecasts. The Fed is scheduled to release the policy and economic forecast at 2 p.m. Eastern on Wednesday, and Yellen will hold a press conference at the end of the deliberations at 2:30 p.m.