S&P Dow Jones Indices is out with a piece of research that highlight the regime conditional benefit of Low Volatility investing.
Understanding any investment strategy requires us to understand how its success is driven by the market regime in which it operates.
Strategies that overweight high beta stocks, e.g., will tend to look good in strong markets and bad in weak markets. Defensive strategies like low volatility or high yield will display the opposite pattern.
As of 13.04.2015 there is 28 Low Volatility ETPs, that you will be able to find under the Volatility Based Enhancement section of the Smart Beta compartment.