Source: Investing.comAll the major indexes posted steep weekly declines, with the 30-stock Dow Jones Industrial Average falling 2%, the S&P 500 dropping 1.6%, while the tech-heavy Nasdaq Composite lost 1.3%, and the small-cap Russell 2000 shed 1.8%.The coming week will once again revolve around developments in the Middle East and oil prices as the conflict between the U.S., Israel and Iran shows no signs of diminishing. Late Friday, the U.S. attacked military targets on Kharg Island, a key Iranian oil export hub.Besides geopolitical worries, the next Fed FOMC meeting concludes on Wednesday. The U.S. central bank is widely expected to…