An electronic board showing the Korea Composite Stock Price Index at a dealing room of the Hana Bank headquarters in Seoul on Wednesday. (Yonhap)
An electronic board showing the Korea Composite Stock Price Index at a dealing room of the Hana Bank headquarters in Seoul on Wednesday. (Yonhap)

South Korean stocks opened slightly lower Wednesday, in line with overnight US stock losses amid lingering uncertainties stemming from President Donald Trump's tariff measures.

The benchmark Korea Composite Stock Price Index dropped 9.02 points, or 0.36 percent, to 2,468.39 in the first 15 minutes of trading.

Overnight, Wall Street closed slightly lower as lingering tariff uncertainty swayed investors to move to the sidelines. The S&P 500 fell 0.17 percent, the Dow Jones Industrial Average shed 0.38 percent, and the tech-heavy Nasdaq composite slid 0.05 percent.

In Seoul, semiconductor shares led the overall decline.

Market heavyweight Samsung Electronics slipped 1.41 percent, and its chip rival SK hynix dropped 2.66 percent following Washington's decision to impose new curbs on Nvidia's H20 artificial intelligence chip exports to China.

Automotive and bio shares also retreated. Top automaker Hyundai Motor slumped 1.39 percent, and leading bio firm Samsung Biologics dipped 0.48 percent.

In contrast, battery and financial shares advanced. Top battery manufacturer LG Energy Solution jumped 1.45 percent, while Kookmin Financial added 0.26 percent.

The local currency was trading at 1,429.5 won against the US dollar at 9:15 a.m., down 4 won from the previous session. (Yonhap)