South Korean shares dropped by more than 3 percent Friday, dragged down by a sell-off in semiconductor stocks amid lingering concerns over the sustainability of artificial intelligence investments. The Korean won strengthened against the US dollar. The benchmark Korea Composite Stock Price Index lost 206.92 points, or 3.48 percent, to close at 5,730.74, after falling as low as 5,599.42. After opening nearly 3 percent lower, the KOSPI extended its losses, prompting the Korea Exchange to activate