Timmer, global macro director of Fidelity, believes that the late code reduction will lead to some downside risks to the economy.
If inflation turns out to be temporary, then the Fed can moderately slow down.
Jurrien Timmer of Fidelity Investments warned that the time window would be "very small" if the Fed were to reduce its monthly bond purchases from $120 billion to zero.
"it needs to act," Timmer, head of global macro at Fidelity, said in an interview with the program on Monday. "either way, I think the Fed has no choice but to go as far as the market can afford."
At the annual Jackson Hole seminar, Federal Reserve Chairman Jerome Powell convinced stock market investors that they would implement some downsizing this year without causing major market turmoil.
Powell's comments in July suggested that there was still some way to go, but the Fed faced pressure from some lawmakers because of rising inflation. Timmer has joined the ranks of strategists such as Brean Capital's John Ryding, who believe that later code reduction will lead to some downside risks to the economy.
However, Timmer said, "if inflation turns out to be temporary, then the Fed can moderately slow down."