US stocks: Nasdaq ends lower as oil prices surge ahead of earnings, economic data

The Nasdaq composite index faced a downturn as oil prices surged following attacks on a Saudi airport. With major banks set to release their earnings reports, investor focus sharpens this week. The S&P 500 and Dow Jones saw mixed performances, while the energy sector thrived. Heightened inflation concerns due to rising oil costs have begun to sway investor confidence, mirroring a cautious market atmosphere tied to earnings and economic uncertainties.