The Best Low-Volatility Funds for a Frothy Market — Barrons.com

By Lewis BrahamFactor funds can be merciless. Aggressive momentum ones have long been the clear winners and defensive low-volatility ones the obvious losers.The popular $22.6 billion Invesco S&P 500 Momentum exchange-traded fund has delivered a blistering 20% 10-year annualized return versus a mode…