U.S. and world shares fell as oil spiked 5% on October 8

Reuters reported that U.S. and world shares fell in midday trading on October 8, 2026, as oil spiked 5%. U.S. Treasury yields were near a 24-year high as tech groups borrowed billions, while the euro was near a 17-month low amid French debt worries. Samsung shares also fell despite an expected ninefold jump in profit.