We argue that long-horizon return reversals [Debondt and Thaler (1985)] reflect a premium for downside risk. Consistent with this, we find that downside betas of past losers are significantly greater than downside betas of past winners, and the inclusion of downside beta in Fama-Macbeth...

Alpha modelling typically refers to the selection and weighting of various information sources, which when combined are used by active portfolio managers to forecast security returns. It is traditionally seen as an exogenous input in the construction of the investment portfolio. Instead, a...

We structurally estimate a model in which agents' information processing biases can cause predictability in firms' asset returns and investment inefficiencies. We generalize the neoclassical investment model by allowing for two biases -- overconfidence and over-extrapolation of trends -- that...

I study a generalized OLG economy where asymmetrically informed agents have arbitrary investment horizons. As horizons increase, the age-adjusted risk aversion of investors fall, and the risk transfer from forced liquidators into voluntary buyers drops. Two equilibria coexist for long enough...

In the three-factor model of Fama and French (1993), portfolio returns are explained by the factors Small Minus Big (SMB) and High Minus Low (HML) which capture returns related to firm capitalization (size) and the book-to-market ratio (B/M). In the standard approach of the model, both the test...

After seventy years with no changes to short sale regulation, the United States Securities and Exchange Commission intervened three times with regulatory action from July 2007 through October 2008. The Commission first loosened restrictions on short sales by repealing the “Uptick Rule” in...

We present a model of optimal allocation to liquid and illiquid assets, where illiquidity risk results from the restriction that an asset cannot be traded for intervals of uncertain duration. Illiquidity risk leads to increased and state-dependent risk aversion, and reduces the allocation to...

We present a model of optimal allocation to liquid and illiquid assets, where illiquidity risk results from the restriction that an asset cannot be traded for intervals of uncertain duration. Illiquidity risk leads to increased and state-dependent risk aversion, and reduces the allocation to...