Abstract :
[en] Motivated by the lack of empirical evidence in favor of the uncovered interest rate parity
rule, we revisit the informational content of interest rate differentials (IRD) to explain
daily exchange rates variations. Proposing a novel version of a GARCH model, we allow
for the IRD to impact on the time-varying conditional asymmetry of the depreciation
rate. We find IRD to be a significant factor for the Euro (EUR), the Swiss franc (CHF),
the Swedish Krona, the Japanese Yen and the British Pound. These findings empirically
support currency crash theories, suggesting that the larger the difference between interest
rates, the more likely the high-yield currency appreciates on average but also exhibits
greater risk of a large depreciation. Compared to random walk and buy-and-hold benchmarks, we document superior out-of-sample mean returns of a trading rule exploiting IRD information for EUR and CHF.
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