Are Pure-Play ETFs Worth the Risk? By: ETF Trends May 24, 2010 at 09:00 AM EDT Read More >> Related Stocks: Allstate Corp Biotechnology Index NYSE ETF Brazil Ishares MSCI ETF PowerShares DB Agriculture Fund S&P Bank ETF SPDR S&P Metals & Mining SPDR US Oil & Gas Explor & Prod Ishares ETF