Asian markets mixed as AI worries hit tech stocks

Asian shares traded mixed Friday as AI-related concerns grew after Alphabet's stock plunge dragged U.S. markets, with Japan's Nikkei 225 falling 2.6% and South Korea's Kospi dropping 5.4%. Alphabet's Class A shares fell 12.6%, their worst day in over 20 years, pulling the S&P 500 down 0.3% and the Nasdaq down 1.4%. The Bank of Japan is closing a two-day policy meeting, with analysts expecting no rate action after last month's hike to 1.25%. Hong Kong's Hang Seng rose 1.2% while Shanghai's composite lost 0.9%. U.S. crude gained 2.8% to $104.86 a barrel, and the 10-year Treasury yield fell to 4.94%.