人民币汇率:缓解升值压力,加快制度改革

近一段时间人民币汇率在内外因的共同作用下升值压力巨大,盯住美元的固定汇率制度已经不符合当前中国的经济形势,但是完全放开人民币汇率让其自由浮动在现有条件下也是行不通的,以市场供求为基础的有管理的浮动汇率制度才是目前的最佳选择。     

The conditional heteroscedasticity of the yen–dollar exchange rate

This paper examines the conditional heteroscedasticity of the yen–dollar exchange rate. A model is constructed by extending the asymmetric power autoregressive conditional heteroscedasticity model to a process that is fractionally integrated. It is found that, unlike the equity markets, the appreciation and depreciation shocks of the yen against the dollar have similar effects on future volatilities. Although the results reject both the stable and the integrated models, our analysis of the response coefficients of the past shocks and the application of the models to the estimation of the capital requirements for trading the currencies show that there are no substantial differences between the fractionally integrated models and the stable models. © 1998 John Wiley & Sons, Ltd.     

论人民币汇率形成机制与资本账户开放

汇率形成机制与资本管理程度是开放经济最重要的两个政策安排。世界各国推进资本账户开放的动因各不相同,其中最主要的是通过资本的跨国界自由流动提高资源的配置效率。但是,近年来新兴市场国家(部分起因于资本流动过快)频繁发生的金融危机告诫我们对资本账户开放应持更谨慎的态度,而且汇率机制与资本账户管理程度必须密切配合,彼此协调,才能避免国际收支的严重失衡。文章通过阐述汇率安排与资本账户开放的关系,指出中国应循序渐进地放松资本管制和开放资本账户,逐步增大汇率制度弹性空间,最终实现资本账户开放和有管理的浮动汇率制度。     

The asymmetric effects of U.S. large-scale asset purchases on the volatility of the Canadian dollar futures market

This paper investigates the asymmetric effects of U.S. large-scale asset purchases on the volatility of the Canadian dollar futures market. This approach is innovative in so far as it examines the effects of allowing two-round impacts to differ in our settings of dynamic volatility with time-varying jump intensity because the world economic situation differs during periods of large-scale asset purchases. Utilizing the daily futures price of the exchange rate for the Canadian dollar against the U.S. dollar, the empirical findings show that U.S. large-scale asset purchases have significant asymmetric effects on the volatility of the Canadian dollar futures market. Two kinds of asymmetry are observed. Firstly, the impact of large-scale asset purchases is smaller in the first round of the large-scale asset purchases than in the second round. Secondly, an expansionary policy causes higher volatility in the Canadian dollar futures market than does a contractionary policy due to a signal of high liquidity.     

实际有效汇率与产业结构调整:基于广东省数据的实证分析

本文采用IMF提供的1990-2009年人民币对美元实际汇率数据,在VAR模型的框架下对实际有效汇率对广东省产业结构的影响进行实证分析。结果表明,在汇率升值的背景下,各个变量之间并不存在长期稳定关系,这就意味着从长期来看,实际汇率变动对广东产业结构调整的影响并不明显,基于广东省经济较强的外源性,我们认为实际有效汇率渐近升值的冲击并不能自动有效地引发产业结构的调整,产业结构的调整仍有赖于政府的政策主导作用。     

人民币汇率波动对NFDI波动的影响及其检验

本文通过对我国NFDI资本流动性及其波动性的计算,检验了人民币/美元汇率波动对NFDI波动性的关系。通过实证分析表明,人民币汇率的波动将导致NFDI资本流动的明显不稳定。在理论研究的基础上,引申出其政策含义：在国际资本流动不断加大的今天,我们必须维护人民币/美元汇率的稳定,这样对于有效引导NFDI的资本流动和维护金融稳定都具有重要的意义。     

Time-varying risk aversion and renminbi exchange rate volatility: Evidence from CARR-MIDAS model

In this paper, we investigate the relation between time-varying risk aversion and renminbi exchange rate volatility using the conditional autoregressive range-mixed-data sampling (CARR-MIDAS) model. The CARR-MIDAS model is a range-based volatility model, which exploits intraday information regarding the intraday trajectory of the price. Moreover, the model features a MIDAS structure allowing for time-varying risk aversion to drive the long-run volatility dynamics. Our empirical results show that time-varying risk aversion has a significantly negative effect on the long-run volatility of renminbi exchange rate. Moreover, we observe that both intraday ranges and time-varying risk aversion contain important information for forecasting renminbi exchange rate volatility. The range-based CARR-MIDAS model incorporating time-varying risk aversion provides more accurate out-of-sample forecasts of renminbi exchange rate volatility compared to a variety of competing models, including the return-based GARCH, GARCH-MIDAS and GARCH-MIDAS incorporating time-varying risk aversion as well as range-based CARR, CARR-MIDAS and heterogeneous autoregressive (HAR), for forecast horizons of 1 day up to 3 months. This result is robust to alternative risk aversion measure, alternative MIDAS lags as well as alternative out-of-sample periods. Overall, our findings highlight the value of incorporating intraday information and time-varying risk aversion for forecasting the renminbi exchange rate volatility.     

Analysis of asymmetric response of exchange rate to interest rate differentials: The case of African Big 4

Using the case of four leading African economies, namely Algeria, Egypt, Nigeria and South Africa, this paper explores the possibility of asymmetric relationship between exchange rate and interest rate differential. In addition, it also tests whether accounting for structural breaks matters for the nexus. The results vary for the four countries based on the choice of exchange rate regime and countries involved in full-fledged floating or managed floating seem to respond more to variations in interest rate differential. Also, accounting for both asymmetries and structural breaks should not be disregarded when modelling this nexus.     

基于LabVIEW的OCT信号采集和分析

虚拟仪器技术,使我们能够在计算机上按照自己的需求来设计实验与仪器,与相应的硬件设备结合使用,方便灵活而且开发周期短。它可以提高实验效率、降低实验成本。本文介绍了自行组建的双波长全光纤OCT系统以及实现该系统信号采集和分析的LabVIEW模块。     

人民币实际汇率变动的出口贸易效应研究

基于跨期最优化贸易模型,通过引入外部不确定性,分析了实际汇率对出口贸易的影响。研究表明:如果企业生产规模报酬递减,则实际汇率变动率增大将导致企业出口量及利润增加。运用中国1985年-2008年间相关数据进行实证检验,发现人民币实际汇率与出口呈正向关系,马歇尔-勒纳假说在中国成立。     

Current account and real effective exchange rate misalignments in Central Eastern EU countries: An update using the macroeconomic balance approach

We make an assessment of the current account and price competitiveness of the Central Eastern European countries that joined the EU, using data up to 2016. Foreign capital flows, fiscal balance and relative output growth seem to play a crucial role in explaining the current account balance. The real effective exchange rate gaps behave in accord with the current account misalignments, which clearly display cyclical behaviour. When foreign direct investments are introduced as a determinant, the misalignments are larger in boom periods (positive misalignments), whereas the negative misalignments are smaller in magnitude. Overall, the countries have moved closer to their equilibria since 2010.     

基于实物期权的延迟策略CODP投资决策分析研究

制造企业实施延迟策略的目的是为了塑造柔性的竞争优势。以过程自由度和过程知识量为维度,分析了延迟策略实施过程中客户订单分离点（CODP）存在的可能性,针对延迟策略CODP定位的特点,利用实物期权的思想,划分了延迟策略实施过程中存在的期权种类,构建了基于延迟期权的CODP投资决策模型,研究结果为实施延迟策略的制造企业定制时机提供了理论指导。     

Nonlinear dynamics of gold and the dollar

Notwithstanding the widely held view that gold and the dollar are negatively correlated, we ask when and why gold and the dollar sometimes depart from their typical inverse relationship and go so far as to move in parallel. Using a threshold vector error correction model (VECM), we investigate the nonlinear relationship between gold and the dollar. We find evidence of short run positive correlation between gold and the dollar under extreme market conditions. Our result suggests that the hedging property of gold is influenced by the gold-dollar threshold process.     

人民币实际汇率与中国出口商品结构的关系研究——基于2005年7月汇改以来的月度数据

选用2005年7月汇改以来的月度数据,采用协整关系检验、误差修正模型分析以及Granger因果关系检验对人民币实际汇率与中国出口商品结构之间的关系进行了研究。结果表明,人民币升值有利于中国出口商品结构的优化,同时中国出口商品结构的优化对于人民币升值也有着正向的推动作用。     

Forecasting risk in the US Dollar exchange rate under volatility shifts

Recent evidence suggests that volatility shifts (i.e. structural breaks in volatility) in returns increases kurtosis which significantly contributes to the observed non-normality in market returns. In this paper, we endogenously detect significant shifts in the volatility of US Dollar exchange rate and incorporate this information to estimate Value-at-Risk (VaR) to forecast large declines in the US Dollar exchange rate. Our out-of-sample performance results indicate that a GARCH model with volatility shifts produces the most accurate VaR forecast relative to several benchmark methods. Our contribution is important as changes in US Dollar exchange rate have a substantial impact on the global economy and financial markets.     

An objective function for simulation based inference on exchange rate data

The assessment of models of financial market behaviour requires evaluation tools. When complexity hinders a direct estimation approach, e.g., for agent based microsimulation models, simulation based estimators might provide an alternative. In order to apply such techniques, an objective function is required, which should be based on robust statistics of the time series under consideration. Based on the identification of robust statistics of foreign exchange rate time series in previous research, an objective function is derived. This function takes into account stylized facts about the unconditional distribution of exchange rate returns and properties of the conditional distribution, in particular, autoregressive conditional heteroscedasticity and long memory. A bootstrap procedure is used to obtain an estimate of the variance-covariance matrix of the different moments included in the objective function, which is used as a base for the weighting matrix. Finally, the properties of the objective function are analyzed for two different agent based models of the foreign exchange market, a simple GARCH-model and a stochastic volatility model using the DM/US-$ exchange rate as a benchmark. It is also discussed how the results might be used for inference purposes. Research has been supported by the DFG grant WI 20024/2-1/2. We are indebted to two anonymous referees of this journal, Leigh Tesfatsion, Patrick Burns and other participants of the CEF’06 conference in Limassol for helpful comments on preliminary versions of this paper.     

对我国巨额外汇储备的分析与思考

在我国外汇储备突破万亿美元成为世界上外汇储备最多的国家后,国内外众多学者对此掀起了新一轮的研究和分析,给出了正反两面的评价。文章着重分析了我国巨额外汇储备的形成原因,并由此对外汇储备适度规模和外汇投资提出相应的建议。     

The impact of offshore exchange rate expectations on onshore exchange rates: The case of Chinese RMB

This paper examines the impact of offshore RMB exchange rate expectations on onshore RMB (CNY) exchange rates. Employing data for the period of 2005–2018, we show that overall offshore market expectations influence onshore RMB rates, but this effect is significant only for the period after the “Second exchange rate regime reform” in 2010. The non-uniform nature of this impact is also confirmed by the existence of a threshold effect of the expectations in the same period. The study improves our understanding of how the offshore RMB market influences onshore RMB spot rates as a result of the marketization reform of the RMB exchange rate regime.     

An examination of the intraday behavior of the yen/dollar exchange rate: The relationship between trading activity and returns volatility

This paper provides additional empirical evidence of the relationship between the volatility of returns and trading activity in foreign exchange markets. Five-minute yen/dollar returns exhibit significant skewness, kurtosis, negative first-order autocorrelation and heteroskedasticity. Market activity (as measured by the intensity of quote arrivals) has a positive and statistically significant effect on conditional returns volatility. Such evidence is consistent with predictions of mixture of distrubutions models.