In a sign of an emerging economic recovery, South Korea's composite leading indicator, or CLI, has risen for a ninth consecutive month, thanks in part to the country's rising stock market.
Nine months is the longest period of increase among the 29 member countries of the OECD.
Complied by the OECD, the figure for December came to 1-hundred-1.5, an increase from the month before of point-3-1 percent.
The CLI indicates the direction of the economy for the next six to nine months.
South Korea's main stock index, the KOSPI, has been reaching new highs in session after session.
It's up more than 9 percent so far this year and around 40 percent from this time last year.