The so-called securitization of housing mortgage loan is to convert the housing mortgage loan issued by financial institutions into mortgage securities (mainly bonds), and then sell these securities to market investors in the capital market to finance funds and spread the risk of housing loan to many investors.
The issuance of mortgage-backed security is essentially a kind of creditor's rights transfer behavior of housing mortgage loan support institutions, that is, the lender transfers all the rights of housing mortgage loan borrowers to securities investors. Mortgage-backed security is a kind of mortgage-backed security (MBS), and the borrower's monthly repayment cash flow is the income source of this security.
Mortgage securitization is just a form of asset securitization. Asset securitization is the general trend.