Presidential Address: Sophisticated Investors and Market Efficiency

Stock‐market trading is increasingly dominated by sophisticated professionals, as opposed to individual investors. Will this trend ultimately lead to greater market efficiency? I consider two complicating factors. The first is crowding—the fact that, for a wide range of “unanchored” strategies, an arbitrageur cannot know how many of his peers are simultaneously entering the same trade. The second is leverage—when an arbitrageur chooses a privately optimal leverage ratio, he may create a fire‐sale externality that raises the likelihood of a severe crash. In some cases, capital regulation may be helpful in dealing with the latter problem.     

Credit cards,new technology and consumer debt*

There has been a rapid expansion in consumer indebtedness in the U.K. The amount of consumer debt has doubled in real terms during the last 10 years. The majority of consumers are able to cope with their debt repayments, but there are a significant number of credit casualties, often burdened with multiple debts. Credit cards have played a significant but not overwhelming part in this increase in debt. There are now 62 bank credit cards for every 100 adults in the U.K., a much higher incidence than in any other European country. Credit cards have been aggressively marketed and sold, and it is possible that they will now move downmarket, to consumers in lower income groups. This possibility highlights the need for a major consumer education campaign on the cost of credit. U.K. consumers' knowledge of and ability to compare credit interest rates is poor, especially among lower income consumers who are most at risk.     

Index Options: The Early Evidence

Index options became the most important traded contracts during their first year of existence. Two contracts, namely those on the S&P100 and the Major Markets Index, have a trading volume which typically surpasses the trading volume in all individual stock option contracts. In this paper, we examine the pricing of the options on the S&P100 and the Major Markets Index. Using intra-day prices, we find the options frequently violate the arbitrage boundary, put/call parity, and are substantially mispriced relative to theoretical values. Our results suggest that tests of option pricing models may be more difficult than previously realized due to nonsynchronous prices, even using “real-time” data from the exchanges.     

FOR BETTER OR FOR WORSE,BUT HOW ABOUT A RECESSION?

In light of the current economic crisis, we estimate hazard models of divorce to determine how state and national unemployment rates affect the likelihood of a divorce or separation. With data in the United States over the 1978–2008 period from the 1979 NLSY, we find some evidence indicating that a higher unemployment rate increases the risk of a marriage ending for couples in years 6–10 of marriage (suggesting counter‐cyclical divorce/separation probabilities) but has no significant effect for couples in years 1–5 of marriage and those married longer than 10 years. The estimates are generally stronger in magnitude when using national instead of state unemployment rates and when considering just divorces rather than the first observed divorce or separation. (JEL J12)     

The Cost of Short‐Selling Liquid Securities

Standard models of liquidity argue that the higher price for a liquid security reflects the future benefits that long investors expect to receive. We show that short‐sellers can also pay a net liquidity premium if their cost to borrow the security is higher than the price premium they collect from selling it. We provide a model‐free decomposition of the price premium for liquid securities into the net premiums paid by both long investors and short‐sellers. Empirically, we find that short‐sellers were responsible for a substantial fraction of the liquidity premium for on‐the‐run Treasuries from November 1995 through July 2009.     

LDC Debt: Forgiveness,Indexation, and Investment Incentives

We compare different indexation schemes in terms of their ability to facilitate forgiveness and reduce the investment disincentives associated with the large LDC debt overhang. Indexing to an endogenous variable (e.g., a country's output) has a negative moral hazard effect on investment. This problem does not arise when payments are linked to an exogenous variable such as commodity prices. Nonetheless, indexing payments to output may be useful when debtors know more about their willingness to invest than lenders. We also reach new conclusions about the desirability of default penalties under asymmetric information.     

Is a Bond Rating Downgrade Bad News,Good News,or No News for Stockholders?

We examine the reaction of common stock returns to bond rating changes. While recent studies find a significant negative stock response to downgrades, we argue that this reaction should not be expected for all downgrades because: (1) some rating changes are anticipated by market participants and (2) downgrades because of an anticipated move to transfer wealth from bondholders to stockholders should be good news for stockholders. We find that downgrades associated with deteriorating financial prospects convey new negative information to the capital market, but that downgrades due to changes in firms' leverage do not.