U.S. stock futures slip, South Korea's Kospi plunges 10%: Live updates

S&P 500 futures dipped 0.1% in early Tuesday trading as investors positioned ahead of a packed week featuring mega-cap earnings and the Federal Reserve's rate decision. South Korea's Kospi plunged 10%, marking one of the sharpest single-session declines for the index and adding to global market volatility.

The futures decline reflects caution before a crucial Federal Reserve meeting that will set the tone for monetary policy heading into the rest of the year. The combination of major tech earnings releases and Fed commentary on rates creates a dual catalyst week that could drive significant volatility across U.S. equities.

The Kospi's 10% drop signals heightened risk-off sentiment in Asian markets, though the specific catalyst for the Seoul market selloff extends beyond the immediate scope of U.S. equity positioning. The modest 0.1% futures decline suggests U.S. traders are taking a wait-and-see approach rather than following Asian markets lower.