U.S. stock futures are pointing to a sharply lower open Tuesday as oil prices surge and investors brace for market volatility. S&P 500 futures and Nasdaq-100 futures both dropped more than 1.5% in premarket trading, signaling a potential selloff when markets open. The decline comes amid heightened uncertainty in global markets.

Oil prices climbed higher Tuesday, with Brent crude futures gaining momentum as supply concerns and geopolitical tensions weigh on the market. The energy sector's rally is creating ripple effects across financial markets, with investors reassessing risk exposure. Energy stocks are likely to see gains while tech and growth sectors face pressure from rising rates.

The futures decline suggests investors are moving to defensive positions ahead of the opening bell. Market participants are watching for further developments in oil markets and potential impacts on inflation and economic growth. With major indices facing pressure, traders are preparing for increased volatility throughout the trading session.