South Korean stocks opened sharply higher Tuesday, with the Kospi rising 2.2% to 7,161.61 as technology heavyweights benefited from renewed enthusiasm for artificial intelligence. The move followed a record close for the tech-heavy Nasdaq, which climbed 2.3% on Monday, while the S&P 500 gained 1.5% and the Dow Jones Industrial Average added 0.7%. Falling global oil prices and softer U.S. Treasury yields further improved investor sentiment.