After Israel attacked Iran, fighting increased. This made oil prices go up a lot and stock prices go down on Friday. People were worried about the world's oil supply and the economy. Major stock markets like the S&P 500, Dow Jones, and Nasdaq all dropped a lot. The price of U.S. oil went up by 7.3% to $72.98 a barrel. Experts believe that oil prices often go down again if the situation does not get worse. But people in finance are watching closely. Companies that use a lot of fuel, like the cruise company Carnival and United Airlines, lost a lot of money. However, U.S. oil companies, defense companies, and gold became more valuable. Even with these changes, prices for most things are still quite stable. But some people are worried that prices could rise because of new taxes from President Trump.