SEE MORE: Treading Carefully With Small-Cap ETFs

Other strong small-cap performers include the PowerShares Russell 2000 Equal Weight Portfolio (NYSEArca: EQWS) and the Schwab U.S. Small-Cap ETF (NYSEArca: SCHA).

Reports CNBC: “The Russell move is “indicative of the fact that there’s probably more strength in the consumer than we had thought six months ago,” Seymour said Monday on CNBC’s “Trading Nation.”

As the broad equities market pushes toward new highs, riskier assets like small-caps have been able to rally back much quicker. When the economy is doing well and the markets rally, we see sentiment for more nimble smaller companies improve and outperform those of their more languorous, larger peers.

For more information on the small-cap segment, visit our small-cap category.

iShares Russell 2000 ETF

Tom Lydon’s clients own shares of IWM.