LONDON — The decision over relaunching quantitative easing at the Fed’s November meeting is a “tough call,” and things can change between now and then, James Bullard, president of the Federal Reserve Bank of St. Louis, said in a CNBC interview.

Bullard said extra quantitative easing was “not a slam-dunk” and Fed members still had to rework their forecasts before the ­November meeting. He said the Federal Open Market Committee could postpone a decision on more quantitative easing until December or January.

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