However, the S&P 500 ( ^GSPC -0.01%) is generally considered the best barometer for the overall U.S. stock market due to its scope and diversity. Read on to see the S&P 500's average return over the last decade, and to learn what Wall Street expects in the future.

Wall Street edged back from its all-time high on Friday, as U.S. stock indexes drifted following mixed profit reports from big companies. The S&P 500 barely budged and slipped by less than 0.1%, a day after rallying within 0.

Wall Street is taking a pause after running to the brink of a record following some mixed profit reports from big U.S. companies. The S&P 500 was flat in early trading Friday and hovering around the all-time high it set last month.