The iShares Russell 2000 ETF (NYSEArca: IWM), which tracks the benchmark Russell 2000 Index, is up more than 6% over the past month, outperforming major large-cap indexes along the way. Some market observers small-cap can continue outpacing their large counterparts.

Small-caps have trailed large-caps for a couple of years now, prompting some market participants to say smaller stocks are playing catch-up and could enter a long period of out-performance. Even if the Russell 2000 gives back some gains in June, the index could keep powering higher in the second half of the year.

The Russell 2000 (RUT) “as I have observed many times, is an index that tends to pivot both short-term and long-term at both half-century and century marks. For most of this year, the 1,600 level acted as resistance while both the 1,450 and 1,500 areas acted as support on separate pullbacks in early February and April. The RUT comes into this week just below the 1,650 half-century mark, which marked last week’s highs in both the Wednesday and Friday trading sessions,” according to Schaeffer’s Investment Research.

Small-Cap Perks

Small-cap companies have often paid higher tax rates than their larger rivals, which means that in many cases they have more to gain from the tax cuts introduced this year.

A stronger dollar means large companies with an international footprint are more susceptible to lower overseas demand for their products. Meanwhile, smaller companies are able to capitalize on a stronger domestic economy. Of the Russell 2000, S&P 500 and Nasdaq-100, only the small-cap benchmark has recently been notching fresh highs.

President Donald Trump has stoked global trade war fears after implementing a tariff on steel and aluminum imports. While larger companies with an international foot print, notably U.S. manufacturers that export finished goods out, have come under fire, most small-cap companies generate most of their revenue from the domestic economy.

“The IWM is the only one of the three that hit an all-time high last week, and total short interest on its components is higher than 88% of comparable readings during the past five years,” according to Schaeffer’s.

For the week ended June 1st, investors added nearly $900 million in new assets to IWM.

For more information on small-capitalization stocks, visit our small-cap category.

Tom Lydon’s clients own shares of IWM.