Small-Cap Rally Could be on Borrowed Time

After scuffling to start 2017, some small-cap exchange traded funds have recently gained momentum. For example, over the past month, the iShares Core S&P Small-Cap ETF (NYSEArca: IJR) and the iShares Russell 2000 ETF (NYSEArca: IWM) are each up about 6% and residing near new highs. Still, some...