Exchange traded funds that track the value style are back in vogue, at least for now. Over the past three months, the iShares S&P 500 Value ETF (NYSEArca: IVE) rose 1.8%, compared to the 4.9% pullback for the iShares S&P 500 Growth ETF (NYSEArca: IVW) and the 1.7% fall-off in the broader...