South Korea's benchmark Korea Composite Stock Price Index (KOSPI) rose by 19.66 points to a record high of 1,483.41 on Wednesday.

The volume of the KOSPI was moderate at 347.3 million shares worth 4.49 trillion won (4.79 billion U.S. dollars).

The rises are mainly driven by foreign investors' buying of tech and financial shares on overnight rallies in U.S. markets, analysts said.

On Wednesday, tech shares led the market's advance. Industry leader Samsung Electronics increased by 3.66 percent to 595,000 won on reports that its business will likely improve thanks to a rebound in computer memory chips. The Hynix Semiconductor also rose 2.11 percent to 33,800 won.

The local currency closed at 936.3 won to one U.S. dollar, up 0.4 won from Tuesday's close.