Most economists think a rate increase is at least a year away despite signs of rising inflation. And at a news conference, Fed Chair Janet Yellen downplayed concerns about inflation.
Recent inflation figures are "noisy," Yellen said.
Her comment suggested that the Fed doesn't see a rate increase as necessary anytime soon to combat rising inflation.
The Fed announced its decisions in a statement Wednesday after it ended a two-day policy meeting. The statement was nearly identical to the one the Fed issued after its last meeting in April. It reiterated its plan to keep short-term rates low "for a considerable time" after it ends its bond purchases, which have been intended to keep long-term loan rates low.
The Fed also downgraded its forecast for growth for 2014, acknowledging that a harsh winter caused the economy to shrink in the January-March quarter. In addition, the Fed barely raised its forecast for inflation.
The Fed expects growth to be just 2.1 per cent to 2.3 per cent this year, down from 2.8 per cent to 3 per cent in its last projections in March. It thinks inflation will be a slight 1.5 per cent to 1.7 per cent by year's end, near its earlier estimate.
It foresees the unemployment rate, now at 6.3 per cent, dipping to between 6 per cent and 6.1 per cent by the end of this year. That's a slight improvement from the Fed's forecast in March, when it predicted that unemployment would be as high as 6.3 per cent at year's end.
The reaction in financial markets was muted. Stocks edged slightly higher, and bond yields remained about where they were before the Fed made its announcement.
The Fed's decision to further pare its bond buying means its monthly purchases of long-term bonds will be reduced from $45 billion to $35 billion starting in July. It marked the fifth cut in the purchases since December as the Fed slows the support it's providing the economy.
The bond buying is expected to end altogether by fall.
The Fed's statement was approved on an 11-0 vote, with support from the Fed's three newest members: Vice Chairman Stanley Fischer, board member Lael Brainard and Loretta Mester, the new president of the Fed's regional bank in Cleveland.
The slight changes in the Fed's statement pointed to signs of a strengthening economy now that a brutal winter has passed. The statement said economic activity had "rebounded," with gains in the job market, household spending and business investment.
The statement signalled no concern about the recent acceleration in inflation. It repeated language on inflation in which the Fed said it was still concerned that inflation remained below its 2 per cent target.