DP5819 Global Private Information in International Equity Markets
This paper studies international equity markets when some investors have private information that is valuable for trading in many countries simultaneously. We use a dynamic model of equity trading to show that 'global' private information helps understand US investors? trading behaviour and performance. In particular, the model predicts global return chasing - positive comovement of US investors? net purchases with returns in many countries - which we show to be present in the data. Return chasing in our model can be due to superior performance of US investors, not inferior knowledge or naive trend-following. We also show that trades due to private information are strongly correlated across countries: a common 'global' factor accounts for about half their variation.
