Bubbles are generally considered the outcome of investor irrationality or informational asymmetry, both objectionable in efficient markets with rational investors. We introduce an Intertemporal-CAPM with market clearing between high- and low-risk-averse rational investors who learn the CAPM...

We document significant intra-year seasonality in outliers of S&P500 daily rates of return. Controlling for outliers in dummy regressions reveals that both the January and Monday effects turn from insignificant to highly significant. Mean daily return on January doubles and becomes significantly...

We compare changes of mean and variance of returns as two regulations have changed between 1992 and 2007 in the Chinese exchanges of Shanghai and Shenzhen. Specifically, we compare the implementation of a ±10% daily return limit vs. the absence of any limit, and the effect of allowing local and...

Mean and variance of daily type A and B stock returns in Shanghai and Shenzhen exchanges are studied before and after these stocks were subject to a ± 10% daily return limit, and when investors' clientele were segmented, vs. merged. We find that imposing the ± 10% return limit significantly...

Pro forma estimation of financial statements often builds on constant ratios to sales revenue. While constant ratios may be relevant for established firms operating in predictable industries, they yield noninformative and possibly misleading information when applied to new firms, and...

This paper presents an equity market where the value of a new technology is infrequently observable while the equity claim of the asset is continuously traded. We clear the stock market between two optimal asset allocation strategies, speculative vs. fundamental, adopted by risk-averse investors...

Bubbles are defined in this paper as a temporary period of asset mispricing during which prices diverge from Rational Expectations Equilibrium (REE) for a period that is too long to be justified by random mispricing about a fixed mean rate of return. We solve for the market price of the risky...

Trend-chasing and Contrarian are well-documented empirical trading patterns that the literature generally attributes to behavioral biases. In contrast, we argue that both are rational portfolio rebalancing strategies in a dynamic asset allocation framework. Analyzing the interactions between...