LQD, given it was first to market in this space, is easily one of the most popular corporate bond ETFs. The ETF is notable for a broad portfolio of bonds from the Markit iBoxx USD Liquid Investment Grade Index, whose underlying liquidity may contribute tight tracking and subdued premiums / discounts. LQD differs from our benchmark in key ways. LQD only selects bonds that have at least three years to maturity, which gives it a longer weighted average maturity and increased interest rate risk. The fund is cheap to hold. In all, LQD offers liquid exposure to a somewhat-aggressive, yield-seeking basket of corporate bonds.