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See detailWhat Drives Exchange Rates? Reassessing Currency Return Predictability
Ferreira Filipe, Sara UL; Maio, Paulo

E-print/Working paper (2015)

We compute a variance decomposition for the log exchange rate based on a present-value relation. At long horizons, return predictability drives the variation in the exchange rate while predictability of ... [more ▼]

We compute a variance decomposition for the log exchange rate based on a present-value relation. At long horizons, return predictability drives the variation in the exchange rate while predictability of future interest rate differentials plays a secondary role. At shorter horizons, the dominant source is predictability of the future spot rate. There is more return predictability and less interest spread and exchange rate predictability in the case of real exchange rates compared to nominal exchange rates. An alternative decomposition based on a first-order VAR tends to overstate the importance of predictability of future interest spreads and exchange rates. [less ▲]

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