US stocks end down as Iran launches missiles at Israel; defense shares rise

U.S. stocks dropped, with the Nasdaq losing over 1%, as investors grew cautious after Iran fired missiles at Israel. Energy and defense stocks rose, while airlines fell. The Dow, S&P 500, and Nasdaq all declined. Market volatility increased and traders speculated on future Federal Reserve rate actions. Investors were also wary of upcoming job data and ongoing port strikes.