These ETFs have your back when markets get rough By: MarketWatch February 24, 2016 at 05:08 AM EST Some ETFs promise to protect your portfolio against market volatility. Columnist John Prestbo tells how to choose one. Read More >> Related Stocks: Pacer Trendpilot 100 ETF Pacer Trendpilot 450 ETF Pacer Trendpilot 750 ETF US Anti-Beta Fund Mkt Neutral Quantshares