A look at the weighted underlying holdings of the First Trust Total US Market AlphaDEX ETF (TUSA) shows an impressive 1052041.0% of holdings on a weighted basis have experienced insider buying within the past six months. Start slideshow:10 ETFs With Stocks That Insiders Are Buying » Arch Capital Group Ltd (ACGL), which makes up 17914.00% of the First Trust Total US Market AlphaDEX ETF (TUSA), has seen 2 directors and officers purchase shares in the past six months, according to the recent Form 4 data.