US futures and Asian shares slip as worries over Trump's Fed chief pick and AI weigh on markets

U.S. futures and Asian shares have skidded as worries over President Donald Trump's nominee to be the next Federal Reserve chair amplified jitters over a possible bubble in the artificial intelligence boom. South Korea's exchange, which is heavily influenced by tech-related developments, briefly suspended trading as its benchmark Kospi dropped 5%. Oil prices fell more than $3.50 a barrel and gold and silver also extended losses after plunging on Friday. The S&P 500 dropped 0.4% Friday after Trump named Kevin Warsh as his nominee to replace Fed chair Jerome Powell. The Dow industrials lost 0.4%. The Nasdaq composite lost 0.9%.