The S&P 500 is the benchmark index most investors use to measure performance, and for good reason. It comprises 500 of the largest companies in America, crisscrossing industries. The index represents the U.

KEY TAKEAWAYS Goldman Sachs raised its forecasts for Chinese and U.S. economic growth and cut its odds for a U.S. recession after the countries agreed Monday to slash tariffs on each other's imports.The Wall Street bank reduced its 12-month odds of a U.