The iShares Russell 2000 ETF (NYSEArca: IWM), the largest exchange traded fund tracking smaller stocks, and the rival iShares Core S&P Small-Cap ETF (NYSEArca: IJR), which follows the S&P SmallCap 600 Index, have been solid performers this year. However, some traders are noting it could be time to prepare for a small-cap pullback.

Supporting the recent move in the small-caps segment, the broad equities market has made a robust rally off its February lows and now expectations for future earnings are on the rise.

Additionally, small-cap ETFs are still attractively priced relative to their larger counterparts.

SEE MORE: A Post-Brexit Opportunity With Small Cap ETFs

For instance, IWM shows a 18.45 price-to-earnings and a 1.68 price-to-book, IJR has a 19.39 P/E and a 1.87 P/B, and VB comes with a 19.77 P/E and a 1.89 P/B.

In Contrast, the Russell 1000 Index of large-caps is trading at a 18.64 P/E and a 2.52 P/B. Historically, the Russell 2000 has traded at an average 5% premium to the Russell 1000 Index since 1985, according to Bank of America Merrill Lynch data.

[related_stories]

Still, there are lingering concerns about the group following several months of bullishness.

Regarding the Russell 2000, “One reason for the index’s weakness is the financials, which have lagged recently, and comprise about a quarter of the Russell, as compared to about 15 percent of the S&P,” reports CNBC.

Small-caps, though, can still navigate through a slowly rising rate environment. Smaller companies, which focus on U.S. markets, are less exposed to a stronger U.S. dollar as rates rise, which would more negatively affect larger corporations with a global footprint. Additionally, periods of rising rates also coincide with expanding economies, which often benefit smaller companies.

SEE MORE: ETFs In 2016: Large Cap vs. Small Cap

Additionally, merger and acquisition activity can continue to pick up ahead, with larger companies seeking to expand by purchasing smaller businesses to complement or expand their markets. Larger firms may be more apt to engage in M&A activity now, especially with interest rates and financing costs near historical lows.

“The divergence, or the momentum, has been lost,” Todd Gordon, founder of TradingAnalysis.com, said Tuesday on “Trading Nation,” pointing to a chart of the relative strength indicator, which is making “lower highs” relative to the Russell 2000,” reports CNBC.

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.