Wall Street ends week lower as oil prices and AI concerns weigh

Wall Street extended losses at the close of a week marked by external uncertainty, with falling AI sector shares and rising oil prices fueling caution. Nvidia CEO Jensen Huang said capital scarcity threatens AI development, as demand far exceeds availability. Analysts at Yardeni Research warned that companies face rising financing costs without sufficient profitability to justify massive investments, questioning whether enough capital exists for ambitious AI spending plans. US 10-year Treasury yields rose slightly after Thursday's bond rally, while French bond markets stabilized amid social instability. Brent crude reached $115 per barrel, the first time since May, following attacks on Saudi Arabia and geopolitical tensions. The Federal Reserve is expected to hold rates steady next week, while US consumer confidence fell to 48 in October, near its historic low.