Asian markets retreat after rebounding AI stocks send the S&P 500 to brink of a new record

Asian shares have retreated, with South Korea's Kospi shedding nearly 8% despite a rebound for AI stocks that lifted stocks on Wall Street. Oil prices rose and U.S. futures were mixed. In Seoul, the Kospi lost 7.6% to 7,444.13 as shares in both Samsung Electronics and SK Hynix slumped 8.7%.