Source: Investing.comThe major averages posted their fourth losing week in a row. The 30-stock Dow Jones Industrial Average dropped 2.1%, the S&P 500 fell 1.9%, while the tech-heavy Nasdaq Composite lost 2.1%, and the small-cap Russell 2000 shed 1.7%.Since the war in Iran began on February 28, the S&P 500 has lost 5.4%, the Nasdaq has declined 4.5% and the Dow is down nearly 7%. All three major indexes are below their 200-day moving averages, underscoring the recent deterioration of sentiment on Wall Street.The focus in the coming week will remain on oil prices, global bond yields and Iran war…