Rating the Rating Agencies and Securitization
by
Michael S. Rozeff
by Michael S. Rozeff
DIGG THIS
Structured
finance and securitization have blown up in the Panic of 2008. Those
in power have learned nothing about the current economic
catastrophe. The U.S. government is still supporting Fannie
Mae and Freddie Mac and still trying to resurrect a system that
has collapsed before its eyes.
There is little
question that governments here and abroad provided the major impetus
for these financial methods that have come to grief. In his book,
Securitization,
Vinod Kothari writes: "In most countries, governments have
tried to promote housing finance, by setting up specialized housing
refinance bodies or secondary mortgage market bodies. The largest
housing finance institution in the world, the Government Housing
Loan Corporation of Japan, is a government-owned entity. The largest
housing finance body in the U.S., Fannie Mae, is a government-sponsored
entity. There are housing finance bodies of different descriptions
throughout the world that are promoted, owned or supported by governments
such as Hong Kong, Malaysia, India, France, South Korea and Spain."
Kothari’s description can be believed, for he is not a critic
of these practices. He believes that "governments owe it to
their citizens to promote affordable housing."
It would be
a grave error to blame the Panic of 2008 on rating agencies. But
because the ratings seem to be at the center of the vortex, we need
to consider them. Major players in the financial community to a
great extent got caught up in a larger tide or wave that was beyond
their control. They work within a system. That system, in this case,
involved government and banking system support for housing finance
and a government and central bank going to great lengths to prevent
or mitigate recessions. But, at the same time, the financial players
contributed to the tide of events. Government provided the picture
frame, the support, and the materials. Following the lure of profit,
the financial industry was induced to paint the government-desired
portrait.
The government
now has many convenient fall guys. It’s even bailing them out. The
public does not see that behind the curtain, the government pulled
and is still pulling the levers.
In their 1969
article "What’s in a bond rating?", Thomas Pogue and Robert
Soldofsky showed that one could, on one’s own, largely replicate
the bond ratings produced by bond-rating agencies. The statistics
available to do the rating were available to the public. Do-it-yourself
ratings were feasible.
In 1977, Mark
Weinstein showed that the bond market anticipated ratings
changes made by the rating agencies. If a bond was going to be downgraded,
the market price had already substantially dropped by the time the
ratings change was announced. Investors in the market effectively
did their own rating changes. The rating agencies developed some
information about securities that other investors did not have,
but investors also were able to assess the risks of debt without
the rating agencies.
Weinstein’s
findings stand to reason. Investors assess a continual stream of
information that alerts them to changes in credit-worthiness. They
have a very large profit incentive to assess and continually re-assess
the risk of debt instruments in case the market and the rating agencies
have it wrong. Investors still have access to information and they
still have a profit incentive, so that they still do their own rating
changes in the market; the markets marked down many, many
debt instruments in 2007, well before the rating agencies downgraded
them.
In the 60s
and 70s, debt instruments were simple. The rating agencies hardly
ever went wrong. The rating agencies sold subscriptions, which means
their ratings had some value. They did not sell ratings to
the issuers of debts. But starting in the 1970s, they changed their
business model. They began charging issuers for ratings. (See here.)
They began working ever more closely with the issuers. The issuers
structured securities so as to obtain the desired ratings. In addition,
structured finance securities became the fastest-growing and most
highly profitable part of the ratings business, providing half the
revenues. A greater potential for conflict of interest arose. It
is not hard to imagine that the technicians at the rating agencies,
who have similar training to the technicians working for the investment
bankers, would share the same outlooks and assumptions about risk
and the evaluation of risk. It is not hard to imagine that they
would develop working relationships that would paper over the very
real difficulties in evaluating the loans and the options packaged
up into exceedingly complex securities.
The securities
being rated and issued and the ratings process became far, far more
complex. (See here.)
Evaluating the many loans packaged into each deal required a very
high level of technical expertise and time. These securities contained
embedded options whose pricing and risk were open to ambiguities
and uncertainties that the mathematics glossed over. Many investors,
usually institutions like pension funds and mutual funds, lacked
the time and expertise. Yet they wanted to invest in the securities
because they promised greater returns for the risk, or so it seemed
at the time.
The demand
for ratings arises in part because governments regulate the investments
of banks. For example, the California code has "eligible securities"
that must have an "eligible rating" by an "eligible
rating service" (see p. 100 of the
code). The regulators choose the major ratings firms as eligible.
The demand also arises because institutions like mutual funds and
pension funds are regulated fiduciaries and need some kind of legal
cover for the investments they choose to make. The major rating
agencies fill the bill because they are a government-approved cartel.
In 1975, the SEC created a designation for credit-raters: Nationally
Recognized Statistical Rating Organization (NRSRO). The SEC rule
created a cartel of three firms: Standard & Poor's Credit Market
Services, Moody's Investors Service, and Fitch, Inc. – these being
the only firms that qualified for use by broker-dealers for satisfying
another of the SEC's rules on net capital. This topic is covered
here.
With more research,
we may find issues and problems with the major rating agencies,
that show that the cartel brought about a degree of laziness and
ineptitude in assigning ratings. We may pinpoint conflicts of interest.
Various court cases will shed light on the internal workings of
the structured finance process. However, since the market accepted
the debt ratings and can re-rate debt on its own in the market place,
there are likely to be other reasons why the ratings of securitized
debts proved to be wide of the mark and contributed to the Panic
of 2008. Why did the market and the rating agencies both
price certain credits as if they were very sound when, in a short
time, they turned out to be quite unsound? Why were, what we now
know to be bad debts, not foreseen? Even though government and the
Fed engineered over-investment in housing and a housing price bubble,
we still have to wonder why investors and the rating agencies cooperated
with the bubble, participated in it, and supported it with high
prices and ratings for securities that turned into junk. In some
sense, their being fooled or induced into participation is what
defines a bubble. I believe that rising prices and profits
encourage participation. Behind those lie the government-sponsored
enterprises. Fannie Mae and Freddie Mac sopped up huge amounts of
securitized mortgage loans. They supported the market. That "success"
encouraged securitized loans for commercial real estate, consumer
loans, credit card debt, and other loans that are now also coming
a cropper as the bubble pricing structure collapses across the board.
We need to
think about investors and rating agencies separately. Investors
buy these securities, but investors are not uniform. The bulls
buy from the bears who sell. In 2007, the bears turned out to
be the smart money; the bulls were the dumb money. The Wall Street
Journal carried a story about a smart-money man, named William
Graham, who manages a hedge fund. He bought credit insurance on
a complex debt security called a CDO. When the CDO market fell,
the value of his insurance rose because he could get the full insured
value. The seller, who wrote that insurance, was the dumb-money
man. His name was Alan McCormack. He sold the insurance on behalf
of a county in Australia. The county now has to make good on the
insurance it sold.
Why did Graham
and McCormack take the opposite sides in this trade? We have a part
of the answer. A local bank recommended the purchase to McCormack.
The security promised 1.2 percent above a bank rate. It was rated
AA. The companies collected within the securitized investment were
thought to be sound. They were not. They included such eventual
failures as Lehman Brothers, Washington Mutual, Freddie Mac, and
two of Iceland’s banks. McCormack didn’t see the crash coming, the
same crash that he was providing insurance against. McCormack was
actually writing a naked put option, which is a risky and exotic
technique. The premium he was charging was nowhere near high enough
to cover the risk. Graham knew that. What he saw was that he could
turn a risky CDO into a riskless CDO by buying rather cheap insurance.
Graham and
McCormack were separated by a number of intermediaries who brokered.
But, for all practical purposes, they traded with each other. The
first thing to realize about investing is that when you are buying,
someone else is selling. And that "someone else" may know
more than you do.
The AA rating
played a part in persuading McCormack to buy. But we can’t blame
the rating agencies entirely for their over-ratings because investors
like McCormack do not have to accept those ratings when they
buy and sell debt securities. Unlike the old days, they cannot form
their own independent assessments because they lack the information
that is available to the rating agencies. They are buying a pig
in a poke. They are foolishly buying without a close examination.
Instead they are relying on the ratings and their bank’s recommendation
with some mixture of their own greed for higher return. Those like
McCormack that trusted will not be so trusting in the future. Once
burnt, twice shy.
The AA rating
for this security was, nonetheless, a blunder. Indeed, the rating
agencies blundered big time. How did that come about? While conflicts
of interest and seeking of profits may have played a part, I believe
that the main reason was bad estimation of models. The rating agencies
made bad judgments concerning the risks of the securities. They
relied on historical data and thought that the future would be like
the past. They looked at matters narrowly. They did not see that
an economy-wide tower of debt would not reach to the sky. This blind
spot about debt is pervasive. Today, faced with the collapse of
that tower, governments and central banks worldwide are again trying
to rebuild it.
The new days
for debts began in the mid-80s. Many of the new debts that have
fallen so much in price and caused such big losses are complex,
not simple, securities. They are created from collections of loans
and securities which are then divided into sub-categories called
tranches. The first ones I ever heard of were around 1986 at a finance
conference. They are called collateralized mortgage obligations
(CMOs). At the time, they repelled me. What foolishness is this
was my reaction? Who is fool enough to dabble in these non-transparent
and illiquid vehicles with complicated pricing? I have my investing
biases, which include high risk-aversion. I am repelled by complex
investments whose pricing I cannot understand or whose underpinnings
depend on imponderable variables. I am repelled by illiquid investments
that cannot be easily sold. I am repelled by investments devised
by mathematicians and sold by investment bankers. They probably
know more than I do. I am likely to be the loser. I am repelled
by hidden risks. How can I expect to get a good deal with all these
reservations? Other such illiquid and doctored up investments include
the limited real estate partnerships that came along some 2030
years ago. I remember a prospectus running 150 pages of fine print.
But what seems like common sense to me I have learned is not always
common sense to others who are more willing to take chances.
The pricing
of the CMOs had definite weak spots. Pricing them required the ability
to uncover and price embedded and complicated options. Mortgage
borrowers could prepay their mortgages; they had an option to prepay.
No one knew exactly how to estimate prepayment. Prepayment changed
the duration of the security in ways unlike the usual bond duration.
These bonds tended to fall faster in bear markets than they rose
in bull markets because of their "negative convexity."
The various tranches differed in these qualities.
The rating
agencies had to rate these complex instruments. They hired more
or less the same kinds of people who created them in the first place.
Everyone made more or less the same assumptions, based on past history,
about prepayment risks. The rating agencies did no worse than anyone
else. It seemed to be good enough. There were no immediate blowups.
The years came and the years went. Confidence in these instruments
grew. Besides, the government and the Fed always seemed to be there
to get the economy going again when it slowed down. Recessions were
mild. New Era thinking began to flourish.
Investors wanted
these securities. That is the other side of this story. Wall Street
manufactured and distributed these securities to institutional investors.
They provided the kinds of returns and risks that these investors
were looking for; they wanted a little extra bang for the buck.
They wanted to look good so as to attract the money of individual
investors. Clearly, the little guy has a problem in assessing the
risks that are being taken by the big guys he turns his money over
to.
We digress
into another problem area in our financial system. The institutions
who buy these securities often do not adequately check up on the
risk of them. They accept the S&P ratings and go for the higher
yields. Why? It’s too costly to evaluate each issue. The issues
seem to work. Their investors don’t seem to care. They are in competition
for funds. Furthermore, they may accept the ratings if buying in
certain rating classes has been legislated to cover their rear-ends.
The institutions doing the buying are often government funds and
pension plans, banks, mutual funds, hedge funds, etc. They are institutions,
not usually individuals. They are agents of individuals,
and being such they do not exercise the care that individuals would
exercise, especially when the individuals are a captive group. Individuals
often do not or cannot check up on the institutions doing the investment
for them. If you are a policeman who works for a town in Maine that
is on the Maine retirement system, your investment choices are restricted.
Restricted investments are often the case. The system of investing
through these agents lacks the appropriate checks and balances of
a market system. It is highly paternal. It discourages people from
learning how to invest on their own. It discourages them from learning
about risk. What’s more, the people doing the investment may farm
it out to yet other managers so that there is even another agent
layer.
The ultimate
bag-holders are the working stiffs who are the contributors to these
plans. They often have no choice, so that the system is not
as free as it looks. These plans that use agents are brought about
through tax loopholes (such as IRA plans) that don't encourage individual
management of one’s investments. In many cases, the person has to
leave the money with the plan managers.
The institutions
are the ones who ratify the ratings of the rating agencies by buying
the securities. The contributors have little or no idea what their
portfolios are being stuffed with. If they knew they contained exotic
securities or were loaded up with the debts of banks, would they
be buying those investments on their own? I certainly would not
like to turn over thousands of dollars to unknown agents following
unknown strategies.
There are some
fine institutional money managers who do a service. They write to
me when I plump for people to learn how to manage their own investments.
I expect to hear from them again. If the average person does not
want to manage his own investments, he still has a nontrivial problem,
which is the evaluation of the managers. End of digression.
The finance
profession (the professors in conjunction with financial engineers
from math and physics) extended their option-pricing models. In
this was much profit. Professors crowded into Wall Street. They
multiplied the number of complex securities into a veritable alphabet
soup. To price the securities, they had to measure certain parameters.
They had to make certain assumptions. They tended to look at past
history. It is at this point that bad estimations creep in. It is
at this point that the rating agencies are likely to make bad assumptions
about risk. The basic error is in thinking that risk is measurable
using past statistical data that is limited in scope. The weak spot
in the thinking of the financial engineers and of modern finance
is the presumption that they understand risk and can measure risk.
There is overconfidence in this realm. Finance professionals are
bewitched by numbers, complex mathematics, and elegant models. They
think they can measure risk objectively. This is why they
are surprised when a seemingly rare event occurs that they think
shouldn’t have happened in 10 million years.
Beyond the
estimation issue, there is an issue of modeling. Most models of
complex securities use various stochastic processes that are complex
but mathematically tractable. Yet the actual processes that generate
returns are even more complex and not reducible to a process that
can be modeled. I very much doubt that economists of any school,
despite their pretensions, understand the factors that determine
price levels of goods, but those prices are critical inputs to the
returns that securities generate.
The bubble
game played out quite rapidly between 2000 and 2007. Before then,
the ratings on these complex instruments held up. The investment
bankers went for the gold and began cooperating with the banks and
mortgage brokers who originated the mortgages. They fundamentally
altered the banking model. They packaged up mortgages into packages
that the raters were asked to rate. The regulators encouraged this
change in the nature of the banking business model. They didn't
see that the banks had a weaker incentive to create strong mortgage
loans (because they were selling them off) and a stronger incentive
to pass on their worst mortgages to others. Greenspan publicly praised
the whole process of securitization. He encouraged mortgage re-financing
as well. This was a major leadership error coming from the top,
and it helped propel the system into a frenzy of securitization.
Greenspan thought that the risks were being managed and appraised
in excellent fashion. But the model estimates were flaky and the
institutions taking up these securities probably did not exercise
the care and diligence they would have if they were investing their
own money.
The
whole story of the Panic of 2008 is complex. The basic causation
traces largely to government, but it does not lie solely with regulation
or inept deregulation. People in free markets make mistakes. They
adopt business models that fail. Failures are an inherent part of
free markets. But government attempts at protecting people from
failures are worse than the failures themselves. The free market,
or some semblance of it, was induced to try an experiment with securitization
and it blew up. That happens. Even in entirely free markets, people
will blunder and have to learn. The free market is not a panacea
for human ignorance and suffering. Then again, neither is government.
People learn even less quickly and remain in even greater ignorance
when they turn their affairs over to government to manage. There
is no more unresponsive agent than government and none that has
a lower incentive to satisfy the demands of the people who turn
to it and trust it to solve their problems.
The risks and
drawbacks of securitization were ignored in the flush of a success
that was supported by government and government-sponsored enterprises.
Securitization is all but dead, but it’s on extremely expensive
life support being paid for by forced exactions from taxpayers.
December
26, 2008
Michael
S. Rozeff [send him mail]
is a retired Professor of Finance living in East Amherst, New York.
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© 2008 LewRockwell.com
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