A model of competitive stock trading is developed in which investors are heterogeneous in their information and private investment opportunities and rationally trade for both informational and noninformational motives. I examine the link between the nature of heterogeneity among investors and the behavior of trading volume and its relation to price dynamics. It is found that volume is positivel...

We propose an evolutionary framework for optimal portfolio growth theory in which investors subject to environmental pressures allocate their wealth between two assets. By considering both absolute wealth and relative wealth between investors, we show that different investor behaviors survive in different environments. When investors maximize their relative wealth, the Kelly criterion is optima...

This paper constructs a new data set from art auctions that include auctioneer presale price estimates to examine the credulity of art investors. While auction houses typically made no price estimates before 1973, they start providing highand lowprice estimates for all artworks thereafter. Thus, we have a natural experiment to observe changes in price behavior under the influence of auctioneer ...

Wben several investors with different risk aversions trade competitively in a capital market, the allocation of wealth fluctuates randomly among them and acts as a state variable against which each market participant will want to hedge. This hedging motive complicates the investors' portfolio choice and the equilibrium in the capital market. This article features two investors, with the same de...

Based upon an examination of 987 ex-dividend events that took place on the Taiwan Stock Exchange between January 1992 and December 2006, we find that differential taxes are an important factor in terms of their effects on share prices and the behavior of investors around the ex-dividend day. Ex-day price drop ratio increases with the average investor’s preference for dividend relative to capita...

We study the investment behavior of foreign investors in association with an equity market liberalization, and find a strong link between foreigners trading and local market returns. In the period following the liberalization, net purchases by foreign investors induced a permanent increase in stock prices, suggesting that local firms reduced their cost of equity capital. We also find a strong l...

This study provides novel evidence on the role of ambiguity aversion in determining the response of mutual fund investors to historical fund performance information. We present a model of ambiguity averse investors who receive multiple performance-based signals of uncertain precision about manager skill. A key implication of the model is that when investors receive multiple signals of uncertain...

We develop a finite horizon continuous time market model, where risk averse investors maximize utility from terminal wealth by dynamically investing in a risk-free money market account, a stock, and a defaultable bond, whose prices are determined via equilibrium. We analyze the endogenous interaction arising between the stock and the defaultable bond via the interplay between equilibrium behavi...