Thursday, October 8

Oil delivered the day’s sharpest cross-asset shock: Brent climbed nearly 5% above $105 a barrel as reports of requested U.S. strike options against Iran and increased Gulf shipping attacks raised supply-risk concerns. President Trump’s statement that the U.S. would not attack before the November midterms trimmed the rally, but did not erase it. The move fed directly into bond-market pressure, with the 10-year Treasury yield reaching about 5.36% and the 30-year hitting its highest level since 2002 before solid auction demand eased long-end selling. Federal Reserve Governor Christopher Waller said further increases would probably be needed to curb inflation, while St. Louis Fed President Alberto Musalem pointed to higher rates over the next six to nine months. Higher yields also supported the dollar. The combination of energy risk and a more restrictive rate outlook leaves less room for markets to price near-term easing.

Semiconductors led the equity retreat, with the Philadelphia Semiconductor Index down 3.4% and the Nasdaq 100 off 1.4%. Samsung Electronics reported record quarterly operating profit, but the result fell short of elevated expectations—a reminder that strong results may not satisfy valuations built around rapid growth. Renewed doubts about AI spending added pressure: reports that OpenAI’s annualized revenue could miss some expectations sharpened scrutiny of whether the sector’s enormous capital commitments can generate commensurate returns. Asian technology shares reflected the same repricing, with the KOSPI down about 2% and Japan’s Nikkei 225 off roughly 0.9%. This was more than a single earnings reaction; the market questioned the payoff from AI investment across the supply chain, leaving chipmakers exposed even after a record result from a major producer.

European assets underperformed as concern about France’s fiscal sustainability pushed its 10-year yield as high as 4.94%. The pressure extended beyond French bonds into Italian and Greek debt and weighed on European banks, while the Euro Stoxx 50 fell about 1.5%, Germany’s DAX 1.4% and France’s CAC 40 1.2%. German 10-year yields reached about 3.52%, and U.K. yields also rose. Fresh inflation warnings from European Central Bank policymakers compounded the strain: higher energy prices could delay rate cuts even as sovereign borrowing costs climb. That leaves European markets facing both sides of the squeeze—greater sensitivity to financing costs and less prospect of near-term monetary relief. The spread of concern beyond France makes this a broader test of sovereign-risk tolerance, not just a country-specific selloff.