Wall Street: a detailed, clearly written, incisive account and analysis of the last ten days

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Diamond and Kashyap on the Recent Financial Upheavals

Steven D. Levitt, NYT

As an economist, I am supposed to have something intelligent to say about the current financial crisis. To be honest, however, I haven't got the foggiest idea what this all means. So I did what I always do when something related to banking arises: I knocked on the doors of my colleagues Doug Diamond and Anil Kashyap, and asked them for the answers. What they told me was so interesting and insightful that I begged them to write their explanations down for a broader audience. They were kind enough to take the time to do so. In what follows, they discuss what has happened in the financial sector in the last few days, why it happened, and what it means for everyday people.

The F.A.Q.'s of Lehman and A.I.G.

By Douglas W. Diamond and Anil K. Kashyap

A Guest Post

For most of the last 20 years we have been studying banks, monetary policy, and financial crises. So for us the events of the last year have been especially fascinating.

The last 10 days have been the most remarkable period of government intervention into the financial system since the Great Depression. In talking with reporters and our noneconomist friends, we have been besieged with questions about several aspects of these events. Here are a few of the most frequently asked questions with our best answers.

1) What has happened that is so remarkable?

This episode started when the Treasury nationalized Fannie Mae and Freddie Mac on September 8. Their combined assets are over $5 trillion. These firms help guarantee most of the mortgages in the United States. The Treasury only got authority from Congress to take this action in July, and in seeking the authority had insisted that no intervention would be needed.

The Treasury has replaced the management of both companies and will presumably oversee their operation. This decision marked an acknowledgment by the government that the mortgage market and the institutions to make it operate in the U.S. are broken.

On Monday, the largest bankruptcy filing in U.S. history was made by Lehman Brothers. Lehman had over $600 billion in assets and 25,000 employees. (The largest previous filing was WorldCom, whose assets just prior to bankruptcy were just over $100 billion.)

On Tuesday, the Federal Reserve made a bridge loan to A.I.G., the largest insurance company in the world; perhaps best known to most of the world as the shirt sponsor of Manchester United soccer club, A.I.G. has assets of over $1 trillion and over 100,000 employees worldwide. The Fed has the option to purchase up to 80 percent of the shares of A.I.G., is replacing A.I.G.'s management, and is nearly wiping out A.I.G.'s existing shareholders. A.I.G. is to be wound down by selling its assets over the next two years. (Don't worry, Man U will be fine.) The Fed has never asserted its authority to intervene on this scale, in this form, or in a firm so far removed from its own supervisory authority.

2) Why did these things happen?

The common denominator in all three cases was the ability of the firms to secure financing. The reasons, though, differed in each case.

The Fannie and Freddie situation was a result of their unique roles in the economy. They had been set up to support the housing market. They helped guarantee mortgages (provided they met certain standards), and were able to fund these guarantees by issuing their own debt, which was in turn tacitly backed by the government. The government guarantees allowed Fannie and Freddie to take on far more debt than a normal company. In principle, they were also supposed to use the government guarantee to reduce the mortgage cost to the homeowners, but the Fed and others have argued that this hardly occurred. Instead, they appear to have used the funding advantage to rack up huge profits and squeeze the private sector out of the "conforming" mortgage market. Regardless, many firms and foreign governments considered the debt of Fannie and Freddie as a substitute for U.S. Treasury securities and snapped it up eagerly.

Fannie and Freddie were weakly supervised and strayed from the core mission. They began using their subsidized financing to buy mortgage-backed securities which were backed by pools of mortgages that did not meet their usual standards. Over the last year, it became clear that their thin capital was not enough to cover the losses on these subprime mortgages. The massive amount of diffusely held debt would have caused collapses everywhere if it was defaulted upon; so the Treasury announced that it would explicitly guarantee the debt.

But once the debt was guaranteed to be secure (and the government would wipe out shareholders if it carried through with the guarantee), no self-interested investor was willing to supply more equity to help buffer the losses. Hence, the Treasury ended up taking them over.

Lehman's demise came when it could not even keep borrowing. Lehman was rolling over at least $100 billion a month to finance its investments in real estate, bonds, stocks, and financial assets. When it is hard for lenders to monitor their investments and borrowers can rapidly change the risk on their balance sheets, lenders opt for short-term lending. Compared to legal or other channels, their threat to refuse to roll over funding is the most effective option to keep the borrower in line.

This was especially relevant for Lehman, because as an investment bank, it could transform its risk characteristics very easily by using derivatives and by churning its trading portfolio. So for Lehman (and all investment banks), the short-term financing is not an accident; it is inevitable.

Why did the financing dry up? For months, short-sellers were convinced that Lehman's real-estate losses were bigger than it had acknowledged. As more bad news about the real estate market emerged, including the losses at Freddie Mac and Fannie Mae, this view spread.

Lehman's costs of borrowing rose and its share price fell. With an impending downgrade to its credit rating looming, legal restrictions were going to prevent certain firms from continuing to lend to Lehman. Other counterparties that might have been able to lend, even if Lehman's credit rating was impaired, simply decided that the chance of default in the near future was too high, partly because they feared that future credit conditions would get even tighter and force Lehman and others to default at that time.

A.I.G. had to raise money because it had written $57 billion of insurance contracts whose payouts depended on the losses incurred on subprime real-estate related investments. While its core insurance businesses and other subsidiaries (such as its large aircraft-leasing operation) were doing fine, these contracts, called credit default swaps (C.D.S.'s), were hemorrhaging.

Furthermore, the possibility of further losses loomed if the housing market continued to deteriorate. The credit-rating agencies looking at the potential losses downgraded A.I.G.'s debt on Monday. With its lower credit ratings, A.I.G.'s insurance contracts required A.I.G. to demonstrate that it had collateral to service the contracts; estimates suggested that it needed roughly $15 billion in immediate collateral.

A second problem A.I.G. faced is that if it failed to post the collateral, it would be considered to have defaulted on the C.D.S.'s. Were A.I.G. to default on C.D.S.'s, some other A.I.G. contracts (tied to losses on other financial securities) contain clauses saying that its other contractual partners could insist on prepayment of their claims. These cross-default clauses are present so that resources from one part of the business do not get diverted to plug a hole in another part. A.I.G. had another $380 billion of these other insurance contracts outstanding. No private investors were willing to step into this situation and loan A.I.G. the money it needed to post the collateral.

In the scramble to make good on the C.D.S.'s, A.I.G.'s ability to service its own debt would come into question. A.I.G. had $160 billion in bonds that were held all over the world: nowhere near as widely as the Fannie and Freddie bonds, but still dispersed widely.

In addition, other large financial firms — including Pacific Investment Management Company (Pimco), the largest bond-investment fund in the world — had guaranteed A.I.G.'s bonds by writing C.D.S. contracts.

Given the huge size of the contracts and the number of parties intertwined, the Federal Reserve decided that a default by A.I.G. would wreak havoc on the financial system and cause contagious failures. There was an immediate need to get A.I.G. the collateral to honor its contracts, so the Fed loaned A.I.G. $85 billion.

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http://freakonomics.blogs.nytimes.com/2008...cial-upheavals/