A number of studies have identifed patterns of positive correlation of returns, or comovement, among different traded securities. We distinguish three views of such comovement. The traditional 'fundamentals' view explains the comovement of securities through positive correlations in the rational...

A number of studies have identified patterns of positive correlation of returns, or comovement, among different traded securities. We distinguish three views of such co- movement. The traditional quot;fundamentalsquot; view explains the comovement of securities through positive correlations in...

We consider two broad views of return comovement: the traditional view, derived from frictionless economies with rational investors, which attributes it to comovement in news about fundamental value, and an alternative view, in which market frictions or noise-trader sentiment delink it from...

A number of studies have identifed patterns of positive correlation of returns, or comovement, among different traded securities. We distinguish three views of such comovement. The traditional quot;fundamentalsquot; view explains the comovement of securities through positive correlations in the...

A number of studies have identifed patterns of positive correlation of returns, or comovement, among different traded securities. We distinguish three views of such comovement. The traditional 'fundamentals' view explains the comovement of securities through positive correlations in the rational...

A number of studies have identifed patterns of positive correlation of returns, or comovement, among different traded securities. We distinguish three views of such comovement. The traditional “fundamentals†view explains the comovement of securities through positive correlations in...

We present an extrapolative model of bubbles. In the model, many investors form their demand for a risky asset by weighing two signals—an average of the asset's past price changes and the asset's degree of overvaluation. The two signals are in conflict, and investors “waver” over time in...

We study asset prices in an economy where some investors classify risky assets into different styles and move funds back and forth between these styles depending on their relative performance. Our assumptions imply that news about one style can affect the prices of other apparently unrelated...