Turning Over Turnover
43 Pages Posted: 27 Dec 2004
There are 4 versions of this paper
Turning Over Turnover
Turning Over Turnover
Date Written: November 2004
Abstract
This paper applies the methodology of Bai and Ng (2002, 2004) for decomposing large panel data into systematic and idiosyncratic components to both returns and turnover. Combining the methodology with a generalized-least-squares-based principal components procedure, we demonstrate that this approach works well for both returns and turnover despite the presence of severe heteroscedasticity and non-stationarity in turnover of individual stocks. We then test the duo-factor model of Lo and Wang's (2000), which is based on mutual fund separation. Our results indicate that trading due to systematic risk in returns can account for as much as 73% of all systematic turnover variation in the weekly time-series and 76% in the cross-section. Thus, portfolio rebalancing due to systematic risk is a very important motive for stock trading. Finally, we demonstrate that several commonly used turnover measures may understate the impact of stock trading.
JEL Classification: G12, G11, G10
Suggested Citation: Suggested Citation
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