Answer:
The "modification" of Ginnie Mae modified pass through certificates is the guarantee of the financial institution from which the mortgages were purchased
Step-by-step explanation:
The "modification" in this case refers to how risk is balanced between the issuer and the investor as opposed to other pass-through certificates.
In the case of modfifed pass through certificates, the investor ins completely protected from default risk as compared to the others where the protection is partial.