Low credit score risk, particularly these backed by government-sponsored entities. Keep in mind, CMOs could embrace any type of mortgage, however, they may or might not include mortgages. The pass-through, short for the pass-through participation certificates, is the most primary type of mortgage-based safety. Essentially, an MBS transforms the mortgage lender into an intermediary between the borrower and the funding industry. Investing in an MBS provides an investor the proper to obtain the value of a group of mortgages.