We investigate the properties of mean-variance efficient portfolios when the number of assets is large. We show analytically and empirically that the proportion of assets held short converges to 50% as the number of assets grows, and the investment proportions are extreme, with several assets held in large positions. The cost of the no-shortselling constraint increases dramatically with the num...

We examine the implications of shortand long-run consumption growth fluctuations on the momentum and contrarian profits and the value premium in a unified economic framework. By allowing time-varying firm cash flow exposures to the short-run and long-run shocks in consumption growth, we find the otherwise standard intertemporal asset pricing model goes a long way in generating the momentum and ...

When capital taxes are used to finance a public good, capital mobility reduces efficiency since it narrows the tax base. This motivates the concern that capital mobility might also interfere with unilateral efforts to provide the public good of environmental quality through pollution taxes. I show in this paper that capital mobility does not affect efficiency in a small open economy, even thoug...

This article surveys financial markets experiments from a particular vantage point, namely, asset pricing theory. The goal is to assess to what extent these experiments have (and could) shed light on the validity of the basic principles of asset pricing theory, namely (i) that markets equilibrate to the point that expected returns are proportional to covariance with aggregate risk, (ii) that ma...

In this paper we introduce a new methodology to test market efficiency and to assess the performance of the most widely accepted asset pricing models. We use this methodology to test the semi-strong form of market efficiency in the context of publicly available accounting information. Instead of testing for a single accounting-based firm characteristic that can generate abnormal excess returns ...

This paper considers the pricing of contingent claims using an approach developed and used in insurance pricing. The approach is of interest and signi...cance because of the increased integration of insurance and ...nancial markets and also because insurance related risks are trading in ...nancial markets as a result of securitisation and new contracts on futures exchanges. This approach uses p...

A cademic Ž nance has evolved a long way from the days when the efŽ cient markets theory was widely considered to be proved beyond doubt. Behavioral Ž nance—that is, Ž nance from a broader social science perspective including psychology and sociology—is now one of the most vital research programs, and it stands in sharp contradiction to much of efŽ cient markets theory. The efŽ cient markets th...

Options pricing model parameters are inherently imprecise due to fluctuations in the real-world financial market. Traditional option pricing methods do not account for the uncertainty in parameters, but the fuzzy set theory may be applicable. This paper proposes a cash-or-nothing European call binary option pricing model based on the hypothesis that the underlying asset price, risk-free rate of...

a r t i c l e i n f o The systematic and important role of investor sentiment has been supported by some recent empirical and theoretical literatures. In this paper, we present a dynamic asset pricing model with heterogeneous sentiments and we find that the equilibrium stock price is the wealth-share-weighted average of the stock prices that would prevail in an economy with one sentiment invest...

No-arbitrage models are extremely flexible modelling tools, but often lack economic motivation. This paper describes an equilibrium consumption based CAPM framework based on Epstein-Zin preferences, which produces analytic pricing formulas for stocks and bonds under the assumption that macro growth rates follow affine processes. This allows the construction of equilibrium pricing formulas while...