Convertible Bonds have been the best performing Fixed Income asset class over the past 3, 5, 10 and 20 years. Given their underlying equity option, Convertible bonds can provide a unique risk/reward profile to a Fixed Income allocation, as shown in the PDF link below:
How Investing in Uncorrelated Strategies Can Hurt Portfolio Performance
SSI highlights the importance of considering correlation alongside other key variables, such as expected returns,