Small-cap stocks have been underperforming larger ones for the second longest stretch since the 1930s. But there are signals that small-cap stocks may be coming out of their dark stretch. As outlined in a report by advisor Pinnacle Associates, the widening gap began in December 2016. In the subsequent seven years ending November 30, 2023, small caps returned 46.25 percent, compared to the S&P 500 generating returns nearly triple that mark at 130.9 percent.