World stocks edged lower on Tuesday as concerns about AI spending weighed on chipmakers, which fell more than 1% on Wall Street; the Dow lost 0.31%, the S&P 500 0.10% and the Nasdaq 0.26%. Traders cited progress by Chinese memory maker CXMT and Broadcom CEO Hock Tan likening some flows into AI to "casino gambling." One portfolio manager said Nvidia and AMD usually trade down before the hyperscalers report because of uncertainty over their capital spending. Earnings season opened with JPMorgan up slightly and Wells Fargo down 2.1%.