Testimony of Michael Fratantoni, Ph.D., for the MBA
House Financial Services Committee
Subcommittee on Housing & Insurance
March 20, 2024
loans with somewhat more flexible underwriting primarily intended for self-employed borrowers
or others with more complex financial or employment patterns.
In the U.S., the predominance of the freely prepayable 30-year fixed-rate mortgage (FRM) as
the product of choice for most homebuyers and refinance borrowers has led to the current
infrastructure where the majority of new loans are securitized rather than held on portfolios.
Typically, more than 80% of mortgages used to purchase a home are 30-year FRMs, while
many refinance borrowers opt for shorter-term, 10-, 15-, or 20-year FRMs. Most of the
remaining loans are hybrid adjustable-rate mortgages (ARM), with initial fixed-rate periods of 5,
7, or 10 years, and then more frequent rate adjustments.
According to MBA’s Weekly
Application Survey data, the ARM share ranged from 7 to a little over 8 percent of applications
in the last two years. This contrasts to an ARM share of only about 3 percent of applications
during the refinance wave in 2020-2021.
Given the inherent interest rate risk in holding FRMs, long-term, freely prepayable mortgages
are not a good asset-to-liability match for banks, most of whom fund themselves primarily with
deposits. ARMs do tend to be a better match. Many banks will sell their FRMs but hold their
ARMs.
Investors of various types, including insurance companies, pension funds, and other fixed
income investors, have an appetite for longer-term assets. Ginnie Mae and the housing GSEs
perform vital functions as intermediaries and/or guarantors of these FRMs, issuing or
guaranteeing mortgage-backed securities (MBS) created from pools of largely fixed-rate loans.
This $9 trillion agency MBS market is one the largest, most liquid fixed income markets in the
world.
Limitations on the loan size and characteristics of loans that can be pooled into agency MBS
pools mean that there is a need for many remaining non-agency eligible mortgages to be held
on balance sheets or to be issued as PLS. Ginnie Mae MBS, backed by Federal Housing
Administration (FHA), Veterans Affairs (VA), and Rural Housing Service (RHS) loans, have an
explicit full faith and credit guarantee. This enables investors to have complete confidence in
the credit worthiness of these securities, while receiving a yield well above that on U.S. Treasury
bonds of a similar duration. Uniform mortgage-backed securities (UMBS), or MBS backed by
Fannie Mae or Freddie Mac, are viewed by global investors as only somewhat less safe given
their strong support from the U.S. government.
The broad and diversified investor base for Ginnie Mae MBS leads to a very liquid market.
Practically, that means that the secondary market for FHA, VA, and RHS loans is always open.
Mortgage rates may move up and down, but low-to-moderate (LMI) first-time home buyers
(FTHB), Veterans, and rural homebuyers will be able to access credit and buy homes.
Deep, liquid capital markets, like those for agency MBS, provide for the availability of mortgage
credit at almost all times. Importantly, I would note that during the GFC and the global
pandemic the Federal Reserve did step in with extraordinary measures to ensure that these
markets remained liquid.