Some bellwether small-cap ETFs, including the iShares Core S&P Small-Cap ETF (NYSEArca: IJR) and the iShares Russell 2000 ETF (NYSEArca: IWM), have recently been notching some nifty gains. However, some market observers believe there are issues facing smaller stocks that could hinder additional upside. Small-caps are also focused on the domestic economy and have less direct exposure [...] Read more on ETFtrends.com >