The first trading day since the United States and Israel attacked Iran saw oil prices jump, leading to a drop in stocks. The U.S. and Israel began attacking Iran on February 28, killing Iran's supreme leader, Ayatollah Ali Khamenei, and targeting over 1,000 targets inside the country. The rise in oil prices, which if prolonged, could increase inflation fears. However, some market analysts believe the initial reaction could fade as investors wait for a clearer picture in the Middle East to emerge. The Dow was down 0.41%, or 200.4 points, to 48,777.52, while the broad S&P 500 shed 0.31%, or 21.01 points.