The overwhelming majority of single-stock ETFs and leveraged or inverse strategies are owned, not by institutional investors, but by retail investors. Individuals are pouring billions into increasingly complex products on bullish beliefs, and now volatility is testing these strategies. OpenInterest.Pro co-founder and CNBC contributor Mike Khouw and NovaDius Wealth Management president Nate Geraci sit down with CNBC’s Dominic Chu on “ETF Edge” to discuss and the outlook for the new year.