To better understand moral hazard, consider the case of a gambler going to a casino. If he bears the losses, his bets will be constrained by that risk. If someone were to guarantee him against loss, but allow him to keep the profits, the gambler would have an incentive to make the riskiest possible bets. He gains all the profits but bears none of the losses. One might designate such a system as “casino capitalism.” Current Fed policy has encouraged casino capitalism in the housing market.
Monetary policy can generate moral hazard if it is conducted so as to bail investors out of risky and otherwise ill‐advised financial commitments. If investors come to expect that the policy will persist, they will deliberately take on additional risk without demanding commensurately higher returns. In effect, they will lend at the risk‐free interest rate on risky projects, or at least at a lower rate than would otherwise be the case. Too much risky lending and investment will take place, and capital will be misallocated.
Money and Prices
To simplify a complex theoretical issue, an ideal monetary policy is one that facilitates and does not distort economic decision‐making by individuals. Market prices play a critical role in that process by signaling to everyone the relative scarcity of goods and urgency of ends.
Austrian economist and Nobel laureate in economics F. A. Hayek characterized the price system as a communications mechanism for transmitting information about economic values. By communicating that valuable information, the price system helps coordinate economic activities. In its simplest formulation, prices tend to bring about equality between supply and demand in each market.
As with any communication system, it is desirable to filter out “noise,” extraneous signals that interfere with communication. Money is indispensable to price formation, but money can generate noise along with information. The ideal monetary policy is one in which there is no noise, only valid price signals. The best possible monetary policy would maximize the signal‐to‐noise ratio.
Monetary noise comes about when policy changes the value of money. In economies on gold or silver standards, the discovery of new sources of the precious metal can set in motion forces leading to an expansion of the money supply and the depreciation in the value of money. In modern times, money is created by printing it, or through expansion of bank liabilities. In nearly all developed countries, the rate of that expansion is (or can be) controlled by central banks.
Changes in the value of money create monetary noise because investors and ordinary individuals mistake changes in money prices for changes in relative prices. For instance, during inflation prices will rise just to reflect the increase in money and not necessarily because there has been a shift in preferences.
Current monetary policy is much improved from the record of the late 1960s, 1970s, and early 1980s. That was the era of double‐digit inflation and sky‐high interest rates. In a December 2002 speech to the Economic Club of New York, then‐Fed Chairman Alan Greenspan put monetary policy in historical context:
Although the gold standard could hardly be portrayed as having produced a period of price tranquility, it was the case that the price level in 1929 was not much different, on net, from what it had been in 1800. But, in the two decades following the abandonment of the gold standard in 1933, the consumer price index in the United States nearly doubled. And, in the four decades after that, prices quintupled. Monetary policy, unleashed from the constraint of domestic gold convertibility, had allowed a persistent overissuance of money. As recently as a decade ago, central bankers, having witnessed more than a half‐century of chronic inflation, appeared to confirm that a fiat currency was inherently subject to excess.
Some scholars have suggested that money influences not only the prices of consumer goods and wages, but also asset prices. They argue that money can work its mischief without showing up in consumer goods inflation. Widely used price indices, such as the consumer price index (CPI), do not include asset prices. A stable price index of consumer goods would thus not be a good measure of the value of money. Professor Charles Goodhart pointed to the two‐decade experience of Japan, in which consumer prices were stable while asset prices fluctuated wildly. He asked rhetorically what the meaning of “inflation” is in such a context.
Goodhart argued that at least one category of assets figures so large in consumer purchases that it cannot be ignored: housing. Rental prices and housing prices do not always move in tandem. Home prices are affected by monetary policy in a number of ways, most notably through interest rates.
If asset prices are not incorporated into measures of inflation, their movements will not be action‐forcing events for policymakers. Fed chairmen will wring their hands about “irrational exuberance,” but will be powerless to do anything until the effects of asset‐price changes are manifested in undesirable changes in current prices and output.
The Greenspan Doctrine
The new moral hazard in financial markets has its source in what can be best described as the Greenspan Doctrine. It was clearly enunciated by Greenspan in his December 19, 2002, speech, in which he made an asymmetric argument leading to an asymmetric monetary policy. He argued that asset bubbles cannot be detected and monetary policy ought not in any case to be used to offset them. The collapse of bubbles can be detected, however, and monetary policy ought to be used to offset the fallout.
Two months earlier Ben Bernanke had made a similar argument. He endorsed the Greenspan Doctrine, arguing against the use of monetary policy to prevent asset bubbles: “First, the Fed cannot reliably identify bubbles in asset prices. Second, even if it could identify bubbles, monetary policy is far too blunt a tool for effective use against them.” Since Bernanke is now Fed chairman, it is reasonable for market participants to assume that the Greenspan Doctrine still governs current Fed policy.
The two men were surely asking and answering the wrong question. They were implicitly treating bubbles as solely the consequences of real shocks or disturbances. (An example of a real shock is a technological innovation leading to productivity gains and higher future expected profits in a sector.) They asked whether monetary policy should be used to offset the effects of real shocks and concluded that it should not. The latter is the correct answer to the question they each posed.
A different question would be whether monetary policy should be conducted so as to create or exacerbate asset bubbles, which would not have occurred or would have been milder absent the assumed monetary policy. The answer to that question is surely no. Consider Bernanke’s apt characterization of moral hazard in the context of the deposit‐insurance crisis: “When this moral hazard is present, credit flows rapidly into inelastically supplied assets, such as real estate. Rapid appreciation is the result, until the inevitable albeit belated regulatory crackdown stops the flow of credit and leads to an asset‐price crash.”
Bernanke could have been talking about the subprime‐mortgage market. That bubble and collapse cannot, however, be blamed on deposit insurance. First, deposit insurance is no longer systematically mispriced and banking supervision has improved. Second, the majority of mortgages are no longer made by insured depository institutions. Yet something generated the moral hazard that enabled shoddy underwriting of subprime mortgages to persist for years.
The Greenspan Doctrine helped create moral hazard in housing finance. The Fed announced that it will take no action against bubbles, but will act aggressively to offset the consequences of their collapse. In effect the central bank is promising at least a partial bailout of bad investments. The logic of the old deposit‐insurance system is at work: policymakers should protect investors against losses, no matter their folly. Or, in Greenspan’s own words: monetary policy should “mitigate the fallout [of an asset bubble] when it occurs and, hopefully, ease the transition to the next expansion.”
In the present context, the “next expansion” could also be rendered as “the next asset bubble.” If the Fed promises to “mitigate the fallout” from “irrational exuberance,” then it is rational for investors to be exuberant. Investors may be at risk for some loss, as with a deductible on a conventional insurance policy, but losses are still being mitigated.
Rate Cut in 2000
The Fed cut the Fed Funds rate sharply after the bursting of the stock market bubble in March 2000. In the eyes of many, the Fed cut rates too far and held them down too long, fueling not only a vigorous economic expansion but also the housing bubble. In his December 2002 speech, Greenspan was at pains to deflect any argument that the Fed was inflating a housing bubble. “To be sure,” he acknowledged, mortgage debt was high relative to household income [remember the date] by historical norms. But “low interest rates” were keeping the servicing requirements of the mortgage debt manageable (emphasis added). “Moreover, owing to continued large gains in residential real estate values, equity in homes has continued to rise despite very large debt‐financed extractions.”
How wrong the Fed chairman was! If Greenspan was not worried about interest rates resetting, why should mortgage bankers and homeowners worry? It would have been reasonable to read into the chairman’s musings an implicit guarantee of continued low rates. A homeowner is certainly entitled to bet his home on the come if he wants. Should the central bank encourage such behavior?
Monetary Policy for a Free Economy
In his 2002 speech to the Economic Club of New York, Greenspan spoke disapprovingly of a policy that permits prices to nearly double in two decades. At current CPI inflation rates, however, prices will double in less than three decades. If inflation were to rise to 3 percent and remain there, prices would double in 24 years. That is not much progress against inflation, and surely we can expect better.
In a vibrant market economy with technological innovation and ever‐new profit opportunities, the monetary policy that maintains true price stability in consumer goods requires substantial monetary stimulus. That stimulus will have a number of real consequences, including asset bubbles. These asset bubbles have real costs and involve misallocations of capital. For example, by the peak of the tech and telecom boom in March 2000, too much capital had been invested in high‐tech companies and too little in “old‐economy firms.” Too much fiber‐optic cable was laid and too few miles of railroad track were laid.
By 2002 the Fed was worried about the possibility of price deflation and introduced a strong anti‐deflationary bias. A tilt to stimulus was understandable at the time. A continued bias against deflation at any cost, however, will produce a continued bias upward in price inflation. The inflation rate begins at the positive number. With the bursting of each asset bubble and the fear of deflationary pressure, Fed policy must ease. The Greenspan Doctrine prescribes a stimulative overkill that begins the cycle anew. The Greenspan‐era gains against inflation will then prove to be only temporary. His doctrine will be the death of his legacy, a legacy that already includes a housing bubble and its aftermath.