In my writing, I tend to focus on dividend-paying ETFs with strong yields, returns, and buy ratings. I sometimes write about weaker ETFs, to warn investors about their shortcomings and provide suitable alternatives. In this article, I'll give a quick overview of three such ETFs. The iShares iBoxx $ High Yield Corporate Bond ETF (HYG) is the largest high-yield bond ETF in the market, with $16.5B in assets. HYG is also one of the most expensive high-yield bond ETFs, with a 0.49% expense ratio. It is around twice the industry average, with several ETFs offering sub 0.10% expenses.