With inflation below the Fed's target, the central bank faces less pressure to scale back its $85 billion-a-month in bond purchases. The bond purchases are intended to keep long-term inflation rates low and stimulate economic growth. But critics fear it raises the risk of higher inflation.
Extremely low inflation may even increase pressure on the Fed to extend the purchases. Some Fed officials have objected to slowing the bond-buying program when inflation is well below 2 percent. A small amount of inflation can be good for the economy because it encourages consumers and businesses to spend and invest before prices rise further.
Fed policymakers will conclude a two-day meeting Wednesday. Economists expect the Fed won't make any changes to its current policies, which include keeping a key short-term interest rate near zero.
The consumer price figures were originally scheduled to be released Oct. 16. But they were delayed by the 16-day partial government shutdown.
The shutdown has likely slowed growth in an already weak economy. Economists expect economic growth at an annual rate of between 1.5 percent and 2 percent from July through September. That would be down from a 2.5 percent annual rate in the April-June quarter.
And economists expect little pickup in the October-December quarter. The shutdown likely cut a quarter- to a half-percentage point from growth in the final three months of the year.