South Korean shares closed slightly higher Friday after plunging more than 3 percent in the previous session, as investors hunted for bargains in major chip stocks amid persistent concerns over investments in the artificial intelligence value chain. The Korean won strengthened against the US dollar. After choppy trading, the benchmark Korea Composite Stock Price Index rose 16.53 points, or 0.3 percent, to end at 5,550.30. The index opened 2.36 percent lower, but individual investors, who were ne