The benchmark Korea Composite Stock Price Index gained 4.75 points, or 0.19 percent, to 2,462.91 in the first 15 minutes of trading.
Most large caps traded mixed, with market kingpin Samsung Electronics rising 0.62 percent.
Top automaker Hyundai Motor fell 0.65 percent, while top steelmaker POSCO rose 1.27 percent.
The local currency was trading at 1,131.05 won against the US dollar, up 4.15 won from the previous session's close. (Yonhap)