Why did Goldman Sachs just upgrade its S&P 500 target?

You're reading a free article with opinions that may differ from The Motley Fool's Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources , and more. Learn More Goldman Sachs just lifted its 3-month target for the S&P 500 Index (SP: .INX) to 5,900 points. After almost entering a bear market, the S&P 500 Index is now flat for the year. Last night, the Nasdaq 100 Index (NASDAQ: .NDX) entered a bull market, having risen more than 20% since 7 April. The S&P 500 is not far…