This excerpt taken from the ACAS 10-K filed Feb 29, 2008.
Investment in non-investment grade CMBS, CLOs and CDOs may be illiquid, may have a higher risk of default, and may not produce current returns
The CMBS, CLO and CDO securities in which we invest are generally non-investment grade, which means that nationally recognized statistical rating organizations rate them below the top four investment-grade rating categories (i.e., AAA through BBB), and are sometimes referred to as junk bonds. Non-investment grade CMBS, CLO and CDO bonds and preferred shares tend to be less liquid, may have a higher risk of default and may be more difficult to value. Non-investment grade securities usually provide a higher yield than do investment grade securities, but with the higher return comes greater risk of default. In addition, the fair value of these securities may change as interest rates change over time. Economic recessions or downturns may cause
defaults or losses on collateral securities to increase. Non-investment grade securities are considered speculative, and their capacity to pay principle and interest in accordance with the terms of their issue is not ensured.