Oil prices have fallen and Asian shares are mostly trading lower. South Korea's Kospi extended its losses after falling more than 16% over the past two days as investors dumped shares of companies linked to the boom in artificial intelligence. Crude prices remain volatile. The U.S. said early Thursday it had conducted a “heavy wave” of strikes against Iran, responding to an attack on a U.S. base. U.S. futures edged higher despite losses Wednesday on Wall Street after the Federal Reserve kept interest rates unchanged. The S&P 500 dropped 1.5%. The Dow Jones Industrial Average fell 2.2%, and the technology-heavy Nasdaq composite lost 1.7%.