Asymmetric and Time-Varying Dependence Between Effective Exchange Rate and Stock Return: Evidence from Taiwan

This study examines the dynamic relationship between exchange rates and stock returns in Taiwan, focusing on asymmetry and time-varying dependence. Using monthly and daily data from 1994 to 2024, we employ ARDL, NARDL, and error correction models (ECM), together with a time-varying copula framework. We contribute to the literature in three ways. First, we provide a unified framework that jointly captures long-run equilibrium, short-run dynamics, and nonlinear dependence. Second, we document robust asymmetric effects, showing that currency depreciation stimulates stock returns, whereas appreciation exerts adverse effects, reflecting Taiwan’s export-oriented economic structure. Third, we show that the dependence between exchange rates and stock returns is time-varying and highly persistent. Overall, the findings highlight the importance of nonlinear and time-varying approaches in understanding exchange rate–stock market interactions and offer important implications for investors and policymakers.