Exchange rates change, asset-denominated currency difference and stock price fluctuation

Luyuan Zheng, Yuexiang Jiang and Huaigang Long

Applied Economics, 2019, vol. 51, issue 60, 6517-6534

Abstract: This paper examines differences in the connectedness between exchange rates and stock prices for companies with different asset currencies on the Hong Kong stock market, and it seeks to explain those differences by proposing a hypothesis on asset-denominated currency difference. Under a framework of investor heterogeneity, we establish a dynamic, discrete theoretical model to analyse the connectedness between exchange rates, the stocks of local Hong Kong companies, the stocks of companies from the mainland and foreign exchange interventions. Using monthly data from January 2000 to August 2018, we adopt the time-varying parameter vector auto-regression (TVP-VAR) model to empirically study the dynamic relationships between exchange rates and the prices of both Hong Kong-based and mainland-based stocks. The results show significant differences in the ways that exchange rates and prices for the two types of stocks are linked. The exchange rates are positively correlated with mainland stocks and negatively correlated with Hong Kong stocks. Moreover, foreign exchange intervention is found to be an effective means for stabilising exchange rates, although such intervention tends to increase stock volatility.Abbreviations: TVP-VAR - time-varying parameter vector auto-regression model; MCMC - Monte Carlo-Markov Chain method.

Date: 2019
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DOI: 10.1080/00036846.2019.1624920

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