High-grade corporate bonds have had a hard time. Yields have surged as prices have fallen. The S&P bond index for AA-rated corporate bonds is down 3.2% so far this year. Losses are concentrated on bonds with maturities of 15 years and over. They’re down 7%, according to Bloomberg. As prices have declined, yields have surged, with the average AA yield now at 3.47%, up from around 2.2% in mid to late-2016:
