TD Ameritrade: Dave Nadig Talks Diversification In A Flexible ETF Wrapper February 9, 2021 Diversification is always key to successful investing, and it’s a great way to get into some ETF education. ETF Trends’ CIO and Director of Research, Dave Nadig, was on hand to discuss some notable ETFs that would serve long-time investors well with TD Ameritrade’s Nicole Petallides during “Market Overtime.” Nadig stars by noting how ETFs truly are great for offering diversification in a single-step package. With that in mind, he explains a few interesting things ETFs have provided, including the process of becoming hyper-diversified or anti-diversified, all within an ETF wrapper.