Small-cap stocks are soaring into the afternoon session, with the Russell 2000 benchmark last trading 85 points, or 3.8% higher following Fed Chair Powell's dovish Jackson Hole address. Small-cap stocks will often move more quickly than their larger counterparts in indexes such as the S&P 500 or the Nasdaq based on their access to financial support. "Most importantly, small caps tend to need an outright recession or a very hot economy to see sustainable outperformance [compared to large cap peers] - conditions that are lacking at the moment," she said.