股价与汇率间联动关系的实证分析

汇率与股票价格之间的关系如何,国内外学者都进行了研究,而结果不尽相同.随着我国汇率改革的进行,人民币汇率变化与股价变化的关系的研究显得迫切而又实际意义.而我国目前这方面的研究尚少.本文以2005年7月21日至2007年7月30日为样本区间,选用二元VAR模型,运用协整检验分析汇率和股价是否存在一种长期的均衡关系,利用Granger因果关系检验方法研究二者是否存在因果关系.得出结论为股价与汇率间存在双向的负相关关系,且汇率对股价的影响大于股价对汇率的影响.并指出本文研究中存在的不足以及今后进一步研究的方向.     

人民币汇率与股价动态相关性的研究——基于次贷危机前后的比较分析

本文基于2005年8月至2010年6月的月度数据,利用协整检验和向量误差修正模型研究了次贷危机发生前后人民币名义有效汇率与股票价格之间的联动关系。实证结果表明,次贷危机发生前中国股市与汇率之间存在正向的长期均衡关系,且两者之间在长期互为因果关系;在次贷危机发生后两者之间则是反向的长期均衡关系,股价波动在长期内是人民币名义有效汇率变动的单向Granger原因。最后本文基于人民币名义有效汇率的计算方法及其影响因素,利用资产组合平衡模型、国际贸易等相关理论对实证结果进行了分析。     

虚拟经济视角下的汇率理论

在经济虚拟化程度很高的现代市场经济中,物质的生产与流通需要价值关系来体现,价值关系是协调整个市场经济系统能否正常运转的关键。汇率涉及两个或多个国家的价值系统的关系,是各国之间对虚拟资产的价格与实体经济实物的价格的比率,在货币与经济虚拟化之后,传统的汇率理论的解释力已显不足,通过对古典贸易理论的国际收支均衡、比较贸易优势理论、蒙代尔-弗莱明模型、资产组合平衡模型和货币分析法模型的简单评述,可看出其在经济虚拟化条件下,国际资本大规模流动造成了传统理论对解释现实的汇率运行及开放经济均衡的局限性。     

汇率与股票价格关系的实证研究

为了考察汇率和股价的动态关系,文章分别对汇率和股价在股权分置改革之前、股权分置改革之后和汇率制度改革之前以及汇率制度改革之后两个变量序列进行单位根检验、10hansen协整检验、因果关系检验,然后建立向量误差修正模型（VEC）。研究发现,只在汇率制度改革之后人民币兑美元的汇率、人民币兑港币的汇率分别与上证综指序列在滞后一天呈现短期显著关系;在三个阶段我国都存在汇率到股价的单向因果关系。     

人民币汇率双向波动背景下金融资产价格联动效应

汇率、利率及股价是金融市场中三种重要的资产价格,在人民币汇率双向波动背景下,三者之间的内在关联性值得深入研究。该文将汇率、利率与股价纳入统一分析框架,构建向量自回归模型,对于2012年4月16日至2016年4月25日的样本数据进行了实证检验。结果发现:利差变动与汇率变动和股价变动两个变量之间都不存在显著的格兰杰因果关系;汇率变动与股价变动之间虽然存在双向格兰杰因果关系,但方差分解的结果却表明,一方引致另一方波动的解释能力较弱。进一步研究表明,人民币汇率双向波动的新常态并没有对三者之间的联动效应产生实质性影响。该文从推进汇率和利率市场化、完善股票市场交易机制等方面,提出增强我国金融市场资产价格信号功能的政策建议。     

国际货币体系多元化、美元估值效应与人民币汇率政策

2008年国际金融危机凸显了国际货币体系弊端。本文从“三元悖论”视角对国际货币体系演变进行了梳理，分析了美元本位加快向多极化体系的过渡。基于两国模型投资组合权重微观行为分析．对汇率波动与储备资产竞争等宏观经济条件进行了研究。结合美元汇率估值效应的经验事实与人民币汇率相关观点辨析，提出了后危机时代促进人民币国际化．加快人民币汇率机制改革的相关政策建议。     

人民币汇率对中国经济增长的影响研究——基于开放拉姆齐模型的拓展

拉姆齐模型是研究一国宏观经济最经典的模型。运用跨时分析方法在新开放经济宏观经济学框架下研究人民币实际有效汇率对经济增长的影响,把实际有效汇率因素引入开放的拉姆齐模型分析框架,并运用该模型对人民币实际有效汇率对经济增长的影响进行了实证分析。实证结果表明,人民币汇率与中国经济增长存在长期稳定关系,人均资本存量的增加降低了中国的经济增长率,技术进步率的上升以及货币投放量的增加均会提高中国的经济增长率。     

基于VAR模型的人民币汇率与股价变动关系研究

在全球经济外部失衡的宏观背景下,人民币汇率与股票价格的变动关系日益加强。以股价和汇率为内生变量,建立向量自回归VAR模型,采用日数据处理对我国股价和汇率之间的变动关系进行实证研究。研究发现,金融危机全面爆发后我国股价和汇率的变动存在由汇率引导股价的单向正向关系。基于实证结果,给出了理论分析和相应的政策建议。     

资产价格、汇率变动与货币政策选择

文章将股价、房价等资产价格和汇率与货币政策目标联系起来,运用VAR模型通过Johansen协整检验等方法研究发现:资产价格、汇率与货币政策中介目标和最终目标之间存在着稳定且长期的联系,同时不同资产价格和汇率之间的波动相关性会带来资产价格与货币政策目标间更加复杂的关系。     

人民币实际有效汇率错位研究

1994年以来,由于宏观因素和短期因素的影响,人民币均衡汇率的波动可分为四个阶段。利用行为均衡实际汇率方法,对人民币实际有效汇率和长期均衡汇率之间的错位程度进行研究,可以发现,不同阶段的错位原因各不相同:2005年之前人民币被高估的主要原因是我国政府采取了盯住美元的汇率政策;2005年之后,人民币高估的主要原因是我国宏观经济基本面的大幅度波动。     

Monetary policy announcements and stock price dynamics in a small open economy

Using a monetary framework with stock markets, this paper investigates dynamic behaviors of a small open economy with various adjustments in the manufacturing prices. For an instantaneous adjustment of the manufacturing prices, stock values and exchange rates may appear to misjump or misadjust at the instant of the monetary policy announcement. When the manufacturing prices adjust sluggishly, exchange rates may overshoot but stock values can exhibit various dynamic patterns, including overshooting or undershooting.     

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

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.     

Stochastic and structural fiscal policy in a monetary stationary economy

In the framework of a monetary asset pricing model which is simple enough to generate closed form formulae for equilibrium price functions the interactions between output, fiscal policy, and asset markets is investigated. With money yielding liquidity services in the exchange process real stock prices are negatively correlated with anticipated (stochastic) fiscal policy changes, while the impact of unanticipated (structural) fiscal policy on the stock market depends qualitatively on the ‘business cycle’ of the economy. It is shown that the monetary character of the economy, more precisely the role of money in the exchange process, is critical for the relationship between fiscal policy and real share prices. Moreover, while contingent fiscal policy measures may be successful in stabilizing the real interest rate on money they are incapable of achieving a stable term structure of the real rate on stocks. In contrast, uncontingently higher public expenditures generally promote the volatility of the real rates on financial assets.     

Are Co-integrated Stock Prices Consistent with the Efficient Market Hypothesis?

This paper responds to the unsatisfactory argument that there is no correspondence between co-integration and the efficient market hypothesis. A law of one co-integrating vector of prices is proposed for the exchange rate and domestic and overseas stock prices. Markets must therefore be efficient in long-run equilibrium because no arbitrage opportunities exist. However, arbitrage activity via the disequilibrium error correction allows above-average (risk-adjusted) returns to be earned in the short run. The elimination of these arbitrage opportunities means that stock market inefficiency in the short run ensures stock market efficiency in the long run.     

The impact of subprime mortgage on correlation between stock and FX markets

Our researching period contains the American subprime mortgage crisis, an insignificant financial crisis and the Asian financial crisis periods. We analyse and compare the interrelations between the stock and Foreign Exchange (FX) markets in Taiwan by the daily data of stock prices and NTD/US exchange rates. The empirical results found that there is no effect on the long-term equilibrium between the stock and FX markets during the American subprime mortgage crisis. It also shows that, whether financial crisis occurs or not, there is no cointegration between the stock and FX markets. Furthermore, the results find that there exists bidirectional causality between the stock and FX markets among the American subprime mortgage crisis and the Asian financial crisis period. However, there is only unidirectional relationship from stock prices to exchange rates during insignificant financial crisis period. Such results imply that two financial crises do significantly affect the short-term interrelationships between the stock and FX markets and lead to more importance for the connection between two markets.     

Dynamic linkages between exchange rates and stock prices: Evidence from East Asian markets

This study examines dynamic linkages between exchange rates and stock prices for seven East Asian countries, including Hong Kong, Japan, Korea, Malaysia, Singapore, Taiwan, and Thailand, for the period January 1988 to October 1998. Our empirical results show a significant causal relation from exchange rates to stock prices for Hong Kong, Japan, Malaysia, and Thailand before the 1997 Asian financial crisis. We also find a causal relation from the equity market to the foreign exchange market for Hong Kong, Korea, and Singapore. Further, while no country shows a significant causality from stock prices to exchange rates during the Asian crisis, a causal relation from exchange rates to stock prices is found for all countries except Malaysia. Our findings are robust with respect to various testing methods used, including Granger causality tests, a variance decomposition analysis, and an impulse response analysis. Our findings also indicate that the linkages vary across economies with respect to exchange rate regimes, the trade size, the degree of capital control, and the size of equity market.     

The relationship between stock prices and exchange rates in South Africa and Nigeria: structural breaks analysis

The relationship between stock prices and exchange rates has continued to generate interest from both the academia and financial industry players for many years. This study conducts an empirical investigation into the relationship between stock prices and exchange rates for the two largest economies in Sub-Saharan Africa – South Africa and Nigeria. Our methodology accounts for structural breaks in the data and the long-run relationship between stock and foreign exchange markets. The results of multivariate causality tests with structural breaks showed that causality runs from exchange rates to domestic stock prices in Nigeria (flow channel) while in South Africa, no causality exists between domestic stock prices and exchange rates. The results also reveal that there is causality from the London stock market to both countries’ stock markets, thus showing that international stock markets are driving both the Nigerian and South African stock markets.     

The comovement between exchange rates and stock prices in the Asian emerging markets

This study investigates the comovement between exchange rates and stock prices in the Asian emerging markets. The sample covers major institutional changes, such as market liberalization and financial crises, so as to examine how the short-term and long-term relations change after such events. The autoregressive distributed lag (ARDL) model proposed by Pesaran et al. (2001) is adopted, which allows us to deal with structural breaks easily, and to handle data that have integrals of different orders. Interest rates and foreign reserves are also included in the analysis to reduce potential omitted variable bias. My empirical results suggest that the comovement between exchange rates and stock prices becomes stronger during crisis periods, consistent with contagion or spillover between asset prices, when compared with tranquil periods. Furthermore, most of the spillovers during crisis periods can be attributed to the channel running from stock price shocks to the exchange rate, suggesting that governments should stimulate economic growth and stock markets to attract capital inflow, thereby preventing a currency crisis. However, the industry causality analysis shows the comovement is not stronger for export-oriented industries for all periods, such as industrials and technology industries, thus implying that comovement between exchange rates and stock prices in the Asian emerging markets is generally driven by capital account balance rather than that of trade.     

Long-run money demand in OECD countries: what role do common factors play?

This article examines the long-run money demand function for 11 OECD countries from 1983Q1 to 2006Q4 using panel data. The distinction between common factors and idiosyncratic components using principal component analysis allows for the detection of cross-member cointegration and the determination as to whether national or international sources are responsible for the non-stationarity of money and its determinants. Indeed, the finding that the common factors are I(1) while the idiosyncratic components are I(0) indicates that cross-member cointegration may exist and non-stationarity in the variables is primarily driven by common international trends. Furthermore, it is found that the impact of income on money demand is positive, whereas it is negative for the interest rate, exchange rate and stock prices. Except for the income elasticity of money demand, all estimated long-run coefficients are larger for the common factors of the variables than for the variables themselves. This article provides evidence that the exchange rate is an important determinant of money demand, whereas the results for the stock prices are ambiguous. Finally, the results of a panel-based error-correction model suggest that several domestic money stocks converge to a common international equilibrium relationship between the common factors.