Investors are also loading up on the metal through exchange-traded products, pouring $487 million into SPDR Gold Shares on Wednesday.
Money has flowed out of the vehicles at the fastest rate since June.
Most of the inflow came in the second half of the month after the Fed laid out an unexpectedly dovish rate-hike outlook, Russia's central bank said.
The world's central banks are beginning to plan their course through the uncharted waters of quantitative tightening.
The GDP growth spread between emerging-market and developed-market nations is expected to widen in 2017 to the most in three years.