Bell sees the outperformance in the Russell 2000 as a bullish signal for the equities market. Small caps leading indicates investors are “starting to get their risk appetites back.” [Small-Cap ETF Rally Could Lead Equities Higher]

Other ETFs that track the small-cap Russell 2000 index include the Vanguard Russell 2000 ETF (NYSEArca: VTWO), which has a 0.21% expense ratio, and the SPDR Russell 2000 ETF (NYSEArca: TWOK), which has a 0.18% expense ratio.

iShares Russell 2000 ETF

For more information on smaller companies, visit our small-cap category.

Max Chen contributed to this article.

Full disclosure: Tom Lydon’s clients own IWM.