US stocks today: S&P 500, Nasdaq fall as investors juggle earnings, Mideast risks and tariffs

Major stock indices experienced declines as concerns over artificial intelligence spending intensified. New tariffs and escalating Middle East conflict also weighed on investor sentiment. Chipmaker Intel's shares fell despite forecasting strong quarterly results and increased future spending. Geopolitical risks, including U.S. strikes in Iran, caused oil prices to surge significantly. Investors now await key economic data and Federal Reserve policy decisions next week.