Seeking Alpha's Abby Carmel and Jonathan Liss recently spoke with Casey to find out how he planned to use ETFs to position clients across a range of healthy asset classes in the coming year. As the US economy heats up and the unemployment rate comes down the Fed will have to make careful policy decisions as to not upset the housing recovery but also keep inflation at bay. (( CS )): For a simple yet effective model for investing at a high-risk tolerance (high volatility), with low fees and global diversification, I would recommend three Vanguard ETFs.