US Futures Slide as KOSPI Drops 6.1%, Oil Tops $108 on Hormuz Fears

On May 15, 2026, a broad risk-off move hit global markets after South Korea's KOSPI sank 6.1% and chipmakers sold off, dragging S&P 500 futures down 0.8% and Nasdaq 100 futures 1.1%. Oil rose sharply, with Brent at $108.75 and WTI at $104.42 as traders weighed potential disruption in the Strait of Hormuz. Bond yields climbed across major markets, with the US 10-year nearing 4.52% and Japan's 20-year yield reaching its highest level since 1996.