US stocks mixed as oil surge on Houthi attack on Riyadh airport stokes Middle East fears

US equities diverged Monday with Nasdaq and S&P 500 falling while Dow rose, as oil prices climbed on reports of a Houthi attack on Riyadh international airport, escalating Middle East conflict fears. The attack, if confirmed, marks a significant escalation targeting Saudi infrastructure, but market reaction was mixed, suggesting investors weigh geopolitical risk against other factors.