Knowledge that Transforms

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An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Orientador :Regina C.C.P. Moran

Abstract Do threats of pharmaceutical price regulation affect subsequent research and development (R&D) spending? This study uses the Clinton administration’s Health Security Act (HSA) of 1993 as a natural experiment to study this issue. We link events surrounding the HSA to pharmaceutical stock price changes and then examine the cross-sectional relation between firms’ stock price changes and their subsequent unexpected R&D spending changes. Results show that the HSA had significant negative effects on stock prices and firm-level R&D spending. Conservatively, the HSA reduced R&D spending by about $1 billion even though it never became law.

We show that the abnormal returns on high default risk stocks documented by Vassalou and Xing (2004) are driven by short-term return reversals rather than systematic default risk. These abnormal returns occur only during the month after portfolio formation and are concentrated in a small subset of stocks that had recently experienced large negative returns. Empirical evidence supports the view that the short-term return reversal arises from a liquidity shock triggered by a clientele change. Copyright © Michael G. Foster School of Business, University of Washington 2010.

Abstract This paper extends the affine class of term structure models to describe the joint dynamics of exchange rates and interest rates. In particular, the issue of how to reconcile the low volatility of interest rates with the high volatility of exchange rates is addressed. The incomplete market approach of introducing exchange rate volatility that is orthogonal to both interest rates and the pricing kernels is shown to be infeasible in the affine setting. Models in which excess exchange rate volatility is orthogonal to interest rates but not orthogonal to the pricing kernels are proposed and validated via Kalman filter estimation of maximal 5-factor models for 6 country pairs.

Abstract The value of American options depends on the exercise policy followed by option holders. Market frictions, risk aversion, or a misspecified model, for example, can result in suboptimal behavior. We study the sensitivity of American options to suboptimal exercise strategies. We show that this measure is given by the Gamma of the American option at the optimal exercise boundary. More precisely, “if B is the optimal exercise price, but exercise is either brought forward when or delayed until a price B̃ has been reached, the cost of suboptimal exercise is given by ½ × Γ ( B ) × ( B − B̃ ) 2 , where Γ ( B ) denotes the American option Gamma.” Therefore, the cost of suboptimal exercise is second-order in the bias of the exercise policy and depends on Gamma. This result provides new insights on American options.

Abstract This paper investigates the relation between information on the state of the economy and equity risk premium. We use a setup where investors have Epstein-Zin preferences and the economy randomly switches between booms and recessions. We are able to establish 2 key results: First, investors with high elasticity of intertemporal substitution (EIS) will require lower excess returns for holding stocks if they are provided with better information on the state of the economy. Second, we find that this also holds for investors with moderate EIS if they are sufficiently risk averse.

Abstract This paper compares downside risk measures that incorporate higher return moments with traditional risk measures such as standard deviation in predicting hedge fund failure. When controlling for investment strategies, performance, fund age, size, lockup, high-water mark, and leverage, we find that funds with larger downside risk have a higher hazard rate. However, standard deviation loses the explanatory power once the other explanatory variables are included in the hazard model. Further, we find that liquidation does not necessarily mean failure in the hedge fund industry. By reexamining the attrition rate, we show that the real failure rate of 3.1% is lower than the attrition rate of 8.7% on an annual basis during the period of 1995–2004.

Abstract We develop an equilibrium model in a 2-country, 2-good, pure exchange economy in which investors with logarithmic utility functions have heterogeneous beliefs about exogenously given output or endowment processes. We obtain closed-form representations of real exchange rates and of stock prices. We show that heterogeneous beliefs together with heterogeneous preferences make the volatility of real exchange rates and of stocks exhibit some properties that have been well documented in the empirical literature. These properties include the high volatility of both real exchange rates and stocks compared with that of economic fundamentals, the high correlation of stocks during periods of volatile markets. The model can also generate the clustering of the volatility of foreign exchange rates and stocks if the differences of beliefs are clustering.