It was the biggest monthly decrease since the central bank started the data series in January 2004.
The decline was due to high interest rates, tightened loan regulations on debt-to-service ratio and seasonal factors linked to bonus payments for the Lunar New Year's holiday, the BOK said in a statement. In January, the BOK raised its policy interest rate by 25 basis points to 3.50%, the highest since late 2008, and suggested its 1-1/2-year rate-hike campaign had ended. ($1 = 1,264.7500 won) (Reporting by Jihoon Lee Editing by Shri Navaratnam)