XMLV offers consistent exposure to the 20% least-volatile stocks in the S&P MidCap 400 Index. Its expense ratio is 0.25% and the ETF has nearly $800 million in assets. The main benefit of the low-volatile strategy is to outperform in drawdowns. My analysis reveals that since its launch in 2013, it's accomplished that goal regularly. Unlike the large-cap segment, less-volatile mid-caps don't sacrifice nearly as much quality compared to their benchmark. In addition, XMLV's value and growth metrics are solid.