The iShares iBoxx $ Investment Grade Corporate Bond ETF (NYSEARCA: LQD ) is both the oldest and most liquid fund in the category . It generates a relatively high yield through broad exposure to high-quality corporate debt at an intermediate duration. LQDJoseph Jones is a professor at The University of Southern Mississippi. He focuses on portfolio construction from a dividend growth investment perspective. The insights expressed in his research are solely his own; they may not represent the views or financia ...