The Exchange Rate Effect of Multi-Currency Risk Arbitrage

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Abstract
This paper documents how currency speculators trade when international capital flows generate predictable exchange rate movements. The redefinition of the MSCI world equity index in December 2000 provides an ideal natural experiment identifying exogenous capital flows of index tracking equity funds. Currency speculators are shown to front-run these capital flows. Furthermore, they actively manage the portfolio risk of their speculative positions through hedging positions in correlated currencies. The exchange rate effect of separate risk hedging is economically significant and amounts to a return difference of 3.6 percent over a 5 day event window between currencies with high and low risk hedging value. The large price impact of hedging positions suggests that risk averse currency speculators contribute to the ‘disconnect’ between the fundamental news about individual exchange rates and their short-run returns.

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