Asset Management

This article studies optimal mortgage design in a continuous-time setting with volatile and privately observable income, costly foreclosure, and a stochastic market interest rate. We show that the features of the optimal mortgage are consistent with an option adjustable-rate mortgage (option ARM). Under the optimal contract, the borrower is given discretion of how much to repay until his balance reaches a certain limit. The default rates and interest rate payment on the mortgage correlate positively with the market interest rate.

We study the structure of optimal wedges and capital taxes in a dynamic Mirrlees economy with endogenous distribution of skills. Human capital is a private, stochastic state variable that drives the skill process of each individual. Building on the findings of the labor literature, we construct a tractable life-cycle model of human capital evolution with risky investment and stochastic depreciation.

This article starts by discussing the concept of "inflation hedging" and provides some estimates of "inflation betas" for standard bond and well-diversified equity indices for over 45 countries. We show that such standard securities are poor inflation hedges. Expanding the menu of assets to foreign bonds, real estate and gold only improves matters marginally. This indicates a potentially important role for inflation index linked bonds.

We study a dynamic overlapping generations model where the population growth rate is stochastic, or can experience gradual but persistent changes. This leads to changes in the demographic makeup of the economy across the young, middle aged (who do the principal saving) and the old (who sell their assets to finance consumption).

This paper examines the so far unexplored relationship between short selling and news. It starts with a theoretical analysis of short selling's potentially beneficial and harmful effects, a brief history of its regulation and a review of the existing empirical literature. The study that follows uses daily NYSE short sale trading data representing a total of 2.3 million firm days and a measure negativity of firm news based on a content analysis of the Dow Jones Newswires.

This paper documents frequent attempts by activist arbitrageurs to open-end discounted closed-end funds, particularly after the 1992 proxy reform which reduced the costs of communication among shareholders. Open-ending attempts have a substantial effect on discounts, reducing them, on average, to half of their original level. The size of the discount is a major determinant of whether a fund gets attacked. Other important factors include the costs of communication among shareholders and the governance structure of the targeted fund.

The preferred risk habitat hypothesis, introduced here, is that individual investors select stocks whose volatilities are commensurate with their risk aversion. The data, 1995-2000 holdings of over 20,000 clients at a large German broker, are consistent with the predictions of the hypothesis: the portfolios contain highly similar stocks in terms of volatility, when stocks are sold they are replaced by stocks of similar volatilities, and the more risk averse customers indeed hold and trade into less volatile stocks.