Asymmetric temporary and permanent stock-price innovations [An article from: Journal of Empirical Finance]

This digital document is a journal article from Journal of Empirical Finance, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
This paper estimates a nonlinear, structural bivariate threshold model in order to identify independent temporary and permanent stock-price innovations in positive-return and negative-return regimes. The model finds that temporary innovations account for as much as 68% of the innovations after negative returns and less than 4% of the innovations after positive returns. This paper shows that the negative-return regime is also the high-volatility regime, a result that links the excess-volatility and asymmetric-volatility literatures. This link provides evidence that temporary stock-price innovations are due primarily to time-varying expected returns in an efficient market and not to a market inefficiency.