Morgan 371, Soldiers Field
Boston, MA 02163
Institutional Affiliation: Harvard University
NBER Working Papers and Publications
|February 1991||Shareholder Trading Practices and Corporate Investment Horizons|
with Kenneth A. Froot, Jeremy C. Stein: w3638
We investigate how shareholder trading practices might be linked to corporate investment horizons. We examine two possible linkages and analyze a range of data relevant to them. The first is excess volatility, which occurs when stock prices react not only to news about economic fundamentals, but also to trades based on non-fundamental factors. Excess volatility could lead to a higher cost of capital, and thereby reduce long-term corporate investment. The second linkage derives from an information ea between management and outside shareholders. In the presence of such a gap, maximizing short-run and long-run stock prices are not the same thing. Management may be able to raise current stock prices by undertaking certain actions that will reduce long-run value. In such a case, management face...
Published: Journal of Applied Corporate Finance, Volume 5, pp. 42-58 Summer 1992 citation courtesy of
|October 1990||New Trading Practices and Short-run Market Efficiency|
with Kenneth A. Froot: w3498
We document a large decrease in autocorrelation and increase in variance of recent short-run returns on several broad stock market indexes, over the 1983-89 period, 15-minute returns went from being highly positively serially correlated to practically uncorrelated. Over the past twenty years, daily and weekly autocorrelations have also fallen, we use transactions data to decompose short-run index autocorrelation into three components: bid-ask bounce, nontrading effects, and noncomtemporaneous cross-stock correlations in specialists' quotes. The first two factors do not explain the autocorrelation's decline. We argue that new trading practices have improved the processing of market-wide information, and that the recent decreases in autocorrelation and increases in volatility simply reflect ...
Published: Revised in Journal of Futures Markets, vol 15, Oct 1995, pp 731-766.