Currency Carry, Momentum, and Global Interest Rate Volatility

Ming Zeng

♦ Returns to currency carry and momentum compensate for the risk of global interest rate volatility (IRV ), with risk exposures explaining 92% of the cross-sectional return variations. This unified explanation stems from its impact on FX intermediaries. An intermediary-based exchange rate model shows that a higher global IRV increases the uncertainty of future risk-taking and tightens current financial constraints. Position unwinding triggers loss of carry and momentum. Additional empirical results confirm this economic channel. Global IRV risk is also negatively priced in other currency strategies and momentum. The explanatory power is not driven by existing measures of uncertainty or intermediary constraints.

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