Seoul stocks surged by more than 2 percent past another historic landmark, surpassing the 9,000-point level for the first time in history, as investors bet on chipmakers in the face of a hawkish stance by the Federal Reserve and Iran uncertainty.

South Korean stocks extended their winning streak for the fifth consecutive session Wednesday on semiconductors to land at a new high, while investors remained cautious of the U.S. Federal Reserve's rate-setting meeting later this week.