What is mortgage securitizer? this was a question i am researching it's about a situation when some company or indivisual(s) takes the earnings from home borrowers and structures the earnings in a way that creates an investment called a Residential Mortgage Backed Security that is sold as shares in a bond class or shares in perhaps a stock within a mutual fund or hedge fund in some cases it could be Commercial Mortgage Backed Security from a collection of similar mortgages called a mortgage pool problem is im not sure how the earnings are divided into the tranches and im confused as to how the construction company gets paid