The benchmark Korea Composite Stock Price Index rose 7.34 points, or 0.3 percent, to 2,441.15 in the first 15 minutes of trading.
Most large caps traded mixed, with market kingpin Samsung Electronics gaining 1.44 percent.
Top automaker Hyundai Motor rose 0.66 percent, while top steelmaker POSCO fell 1.09 percent.
The local currency was trading at 1,132.85 won against the US dollar, up 2.25 won from the previous session's close. (Yonhap)