NBER Publications by John Griffin

This paper investigates the dynamic relation between market-wide trading activity and returns in 46 markets. Many stock markets exhibit a strong positive relation between turnover and past returns. These findings stand up in the face of various controls for volatility, alternative definitions for turnover, and differing sample periods, and are present at both the weekly and daily frequency. However, the magnitude of this relation varies widely across markets. Several competing explanations are examined by linking cross-country variables to the magnitude of the relation. The relation between returns and turnover is stronger in countries with restrictions on short sales and where stocks are highly cross-correlated; it is also stronger among individual investors than among foreign or institut...

In a model that is consistent with the existence of a home bias and with foreign investors that are less informed than domestic investors, we show that unexpectedly high worldwide returns lead to net equity inflows into small countries. In addition, a small country experiences net equity inflows when its stocks earn unexpectedly high returns. We investigate these predictions using daily data on net equity flows for nine emerging market countries and find that equity flows are positively related to host country stock returns as well as market performance abroad. Both our theoretical model and our empirical analysis show that global stock return performance is an important factor in understanding equity flows.

It is widely accepted that, for some industries, competition across countries is" economically important and that this competition is strongly affected by exchange rate changes." This paper explores the validity of this view using weekly stock return data on 320 industry pairs" in six countries from 1975 to 1997. It is found that common shocks to industries across countries" are more important than competitive shocks. Weekly exchange rate shocks explain almost" nothing of the relative performance of industries. Using returns measured over longer horizons the importance of exchange rate shocks increases slightly and the importance of common shocks" to industries increases more substantially. Both industry and exchange rate shocks are more" important for industries that produce goods tra...