Stocks have been flat for 18 months, but some market participants see potential upside in the second half despite many reasons to doubt the staying power of this weeks' gains.
After Thursday's close, the Dow Jones industrial average and the S&P 500 were virtually unchanged for the year, having gained just 2.69 percent and 2.90 percent, respectively. Both were flat in 2015 overall.
That said, the first half of the year has been anything but uneventful. A global recession scare roiled financial markets across the globe, led lower by the crude market. U.S. oil on Feb. 12 hit its lowest level since May 2003.