South Korea's money supply grew at the fastest pace in 10 months in December due to an increase in bank lending, the central bank said Wednesday. South Korea's M2, a narrow measure of the money supply, rose 5.3 percent to 1,932 trillion won (US$1.812 trillion) in December from a year earlier, accelerating from a 5.1 percent on-year gain in November, according to the Bank of Korea (BOK).