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REAL ESTATE RESEARCH

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November 17, 2011

REAL ESTATE RESEARCH
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Real Estate Research provided
analysis of topical research and
current issues in the fields of housing
and real estate economics. Authors
for the blog included the Atlanta Fed's
Jessica Dill, Kristopher Gerardi, Carl
Hudson, and analysts, as well as the

Taking on the conventional wisdom about fixed rate
mortgages

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RECENT POSTS

The long-term fixed rate mortgage (FRM) is a central part of the mortgage
landscape in America. According to recent data, the FRM accounts for 81
percent of all outstanding mortgages and 85 percent of new originations.1 Why is

Assessing the Size and Spread of
Vulnerable Renter Households in

it so common? The conventional wisdom is that the FRM is a great product
created during the Great Depression to bring some stability to the housing

the Southeast
What's Being Done to Help Renters

In December 2020, content from Real
Estate Research became part of

market. Homeowners were defaulting in record numbers, the story goes,
because their adjustable rate mortgages (ARMs) adjusted upward and caused

during the Pandemic?
An Update on Forbearance Trends

Policy Hub. Future articles will be
released in Policy Hub: Macroblog.

payment shocks they could not absorb.

Examining the Effects of COVID-19
on the Southeast Housing Market

In a Senate Committee on Banking, Housing, and Urban Affairs hearing on
October 20, some experts presented testimony that followed this conventional

Southeast Housing Market and
COVID-19

wisdom. As John Fenton, president and CEO, Affinity Federal Credit Union, who
testified on behalf of the National Association of Federal Credit Unions, laid out

Update on Lot Availability and
Construction Lending

in his written testimony:

Tax Reform's Effect on Low-Income
Housing

Boston Fed's Christopher Foote and
Paul Willen.

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Prior to the introduction of the 30-year FRM, U.S. homeowners were
at the mercy of adjustable interest rates. After making payments on a

Housing Headwinds
Where Is the Housing Sector

loan at a fluctuating rate for a certain period, the borrower would be
liable for the repayment of the remainder of the loan (balloon

Headed?
Did Harvey Influence the Housing

payment). Before the innovation of the 30-year FRM, borrowers could
also be subject to the "call in" of the loan, meaning the lender could

Market?
CATEGORIES

demand an immediate payment of the full remainder. The 30-year
FRM was an innovative measure for the banking industry, with lasting

Affordable housing goals

significance that enabled mass home ownership through its
predictability.

Credit conditions
Expansion of mortgage credit
Federal Housing Authority
Financial crisis

Of course, this picture of the 30-year FRM as bringing stability to the housing
market has profound implications for recent history. Many critics attribute the
problems in the mortgage market that started in 2007 to the proliferation of
ARMs. According to the narrative, lenders, after 70 years of stability and success
with FRMs, started experimenting with ARMs again in the 2000s, exposing
borrowers to payment shocks that inevitably led to defaults and the housing
crisis. Indeed, one of the other panelists at the hearing, Janis Bowdler, senior
policy analyst for the National Council of La Raza, argued in her written
testimony that "when the toxic mortgages began to reset and brokers and
lenders could no longer maintain their refinance schemes, a recession ushered
in record-high foreclosure rates."
I argue, on the other hand—both in my testimony at the hearing and in this post
—that the narrative of the fixed rate mortgage as an inherently safe product
invented during the Depression that would have mitigated the subprime crisis

Foreclosure contagion
Foreclosure laws
Governmentsponsored enterprises
GSE
Homebuyer tax credit
Homeownership
House price indexes
Household formations
Housing boom
Housing crisis
Housing demand
Housing prices
Income segregation
Individual Development Account

because it

Loan modifications
Monetary policy

eliminated payment shocks does not fit the facts.

Mortgage crisis
Mortgage default

Parsing the myths around the fixed rate mortgage
First, the FRM has been around far longer than most people realize. Most people
attribute the FRM's introduction to the Federal Housing Administration (FHA) in
the 1930s.2 But it was the building and loan societies (B&Ls), later known as
savings and loans, that created them, and they created them a full hundred
years earlier. Starting with the very first B&L—the Oxford Provident Building
Society in Frankfort, Pennsylvania, in 1831—the FRM accounted for almost
every mortgage B&Ls originated. By the time of the Depression, B&Ls were not
a niche player in the U.S. housing market. They were, rather, the largest single
source of funding for residential mortgages, and the FRM was central to their
business model.
As Table 2 of my testimony shows, B&Ls made about 40 percent of new
residential mortgage originations in 1929 and 95 percent of those loans were
long-term, fixed-rate, fully amortized mortgages. Importantly, B&Ls suffered

Mortgage interest tax deduction
Mortgage supply
Multifamily housing
Negative equity
Positive demand shock
Positive externalities
Rental homes
Securitization
Subprime MBS
Subprime mortgages
Supply elasticity
Uncategorized
Upward mobility
Urban growth

mightily during the Depression, so the facts simply do not support the idea that
the widespread use of FRMs would have prevented the housing crisis of the
1930s.

Source: Grebler, Blank and Winnick (1956)
Note: Market percentage is dollar-weighted. Building and loan societies were the
main source of funds for residential mortgages and almost exclusively used longterm, fixed-rate, fully amortizing instruments.
To be sure, at 15–20 years, the terms on the FRMs the FHA insured were
somewhat longer than those of pre-Depression FRMs, which typically had 10–15
year maturities.3 The 30-year FRM did not emerge into widespread use until
later. It must be stressed that none of the arguments that Fenton made hinge on
the length of the contract. Furthermore, the argument that Bowdler made in her
testimony—that by delaying amortization, a 30-year maturity lowers the monthly
payment as compared to a loan with shorter maturity—applies as much to ARMs
as it does to FRMs.
But even though the ARMs may not have caused the Depression, FRM
supporters might ask, didn't the payment shocks from the exotic ARMs cause the
most recent crisis? Again, the data say no. Table 1 of my Senate testimony
shows that payment shocks actually played little role in the crisis.

Source: Lender Processing Services and author's calculations.
Note: Sample is all first-lien mortgages originated after 2005 on which lenders
initiated foreclosure proceedings from 2007 to 2010.
Of the large sample of borrowers who lost their homes, only 12 percent had a
payment amount at the time they defaulted that exceeded the amount of the first
scheduled monthly payment on the loan. The reason there were so few is that
almost 60 percent of the borrowers who lost their homes had, in fact, FRMs. But
even the defaulters who did have ARMs typically had either the same or a lower
payment amount due to policy-related cuts in short-term interest rates.
To be absolutely clear here, my discussion so far focuses entirely on the
question of whether the design of the FRM is inherently safe and eliminates a
major cause of foreclosures. The data say it does not, but that does not
necessarily mean that the FRM does not have benefits. As I discussed in my
testimony, all else being equal, ARMs do default more than FRMs, but since
defaults occur even when the payments stay the same or fall, the higher rate is
most likely connected to the type of borrower who chooses an ARM, not to the
design of the mortgage itself.
The difficulty of measuring the systemic value of fixed rate mortgages
One common response to my claim that the payment shocks from ARMs did not
cause the crisis is that ARMs caused the bubble and thus indirectly caused the
foreclosure crisis. However, it is important to understand that this argument,
which suggests that the FRM has some systemic benefit, is fundamentally
different from the argument that the FRM is inherently safe. This difference is as
significant as that between arguing that airbags reduce fatalities by preventing
traumatic injuries and arguing that they somehow prevent car accidents.
Measuring the systemic contribution of the FRM is exceedingly difficult because
the use of different mortgage products is endogenous. Theory predicts that home
buyers in places where house price appreciation is high would try to get the
biggest mortgage possible, conditional on their income, something that an ARM
typically facilitates. When the yield-curve has a positive slope (in most cases)
and short-term interest rates are lower than long-term interest rates, ARMs loans

offer lower initial payments compared to FRMs. Thus, it is very difficult to
disentangle the causal effect of the housing boom on mortgage choice from the
effect of mortgage choice on the housing boom.
In addition, there is evidence from overseas that suggests that the FRM is not
essential for price stability. As Anthony B. Sanders, professor of finance at the
George Mason School of Management, points out in his written testimony,
FRMs are rare outside the United States. A theory of the stabilizing properties of
FRMs would have to explain why Canadian borrowers emerged more or less
unscathed from the global property bubble of the 2000s, despite almost
exclusively using ARMs.
By Paul Willen, senior economist and policy adviser at the Boston Fed (with
Boston Fed economist Christopher Foote and Atlanta Fed economist Kristopher
Gerardi)

1
2

3

First liens in LPS data for May 2011.
See the testimony of Susan Woodward for a discussion.
See the discussion in chapter XV of Leo Grebler, David M. Blank, and Louis

Winnick (Princeton, NJ: Princeton University Press, 1956), 218–235; available
on the website of the National Bureau of Economic Research.
November 17, 2011 in Homeownership, Housing prices, Mortgage crisis,
Mortgage default, Subprime mortgages | Permalink

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