Asset allocation under stochastic interest rate with regime switching

We investigate an optimal asset allocation problem in a Markovian regime-switching financial market with stochastic interest rate. The market has three investment opportunities, namely, a bank account, a share and a zero-coupon bond, where stochastic movements of the short rate and the share price are governed by a Markovian regime-switching Vasicek model and a Markovian regime-switching Geometric Brownian motion, respectively. We discuss the optimal asset allocation problem using the dynamic programming approach for stochastic optimal control and derive a regime-switching Hamilton–Jacobi–Bellman (HJB) equation. Particular attention is paid to the exponential utility case. Numerical and sensitivity analysis are provided for this case. The numerical results reveal that regime-switches described by a two-state Markov chain have significant impacts on the optimal investment strategies in the share and the bond. Furthermore, the market prices of risk in both the bond and share markets are crucial factors in determining the optimal investment strategies.     

Friction model and foreign exchange market intervention

The friction model is consistent with the hypothesis that a central bank intervenes in a foreign exchange market only if the necessity grows beyond certain thresholds. For this feature, the model is adopted in some recent studies as an attractive central bank reaction function. However, with official data on Federal Reserve and Bundesbank intervention, this paper shows that the friction model's advantage relative to a linear model may be negligible in terms of RMSE and MAE of in-sample fitting and out-of-sample forecasts. The implication is that intervention decisions are at the monetary authorities' discretion rather than dictated by a rule.     

The effects of exchange rate uncertainty on exports

We investigate the effects of exchange rate uncertainty on exports in the context of a multivariate framework in which a structural open economy vector autoregression is modified to accommodate multivariate GARCH-in-Mean errors, as detailed in Elder (Elder, J., 2004. Another perspective on the effects of inflation uncertainty. Journal of Money, Credit, and Banking 36, 912–928). Our measure of exchange rate uncertainty is the conditional standard deviation of the forecast error of the change in the exchange rate. We isolate the effects of exchange rate uncertainty on exports and also analyze how accounting for exchange rate uncertainty affects the response of exports to exchange rate shocks. We estimate the model using aggregate monthly data for the United States, over the flexible exchange rate period (since 1973). We use full information maximum likelihood estimation procedures and find that exchange rate uncertainty has a negative and significant effect on US exports. We also find that accounting for exchange rate uncertainty tends to strengthen the dynamic response of exports to shocks in the exchange rate and that exports respond asymmetrically to positive and negative exchange rate shocks of equal magnitude.     

Understanding changes in exchange rate pass-through

Recent research suggests that there has been a decline in the extent to which firms “pass-through” changes in exchange rates to prices. This paper provides further evidence in support of this claim. Additionally, it proposes an explanation for this phenomenon. The paper then presents empirical evidence of a structural break during the 1990s in the relationship between the real exchange rate and CPI inflation for a set of fourteen OECD countries. It is suggested that the recent reduction in the real exchange rate pass-through can in part be attributed to the low inflationary environment of the 1990s.     

The behavior of the exchange rate in the genetic algorithm with agents having long memory

This paper studies the behavior of the exchange rate in Kareken and Wallace (1981)'s model under the genetic algorithm adaptation with agents having long memory. The simulation results show that, if agents have full memory, the average portfolio fraction will converge, and the initial equilibrium that it converges to is history dependent. Under the lasting evolutionary pressure of the noise trader, the market will eventually drift from one equilibrium to another, and asymptotically will converge to the neighborhood of an equilibrium with agents putting their savings equally into two currencies. If the agents do not have full memory, the foreign exchange market will show periodic crisis. Before and after a market crises, the average portfolio fraction will converge to different stationary equilibria. A mean difference equation of the average portfolio fraction is also given to describe the dynamics of the model.

Communication and exchange rate policy

Monetary authorities in the G3 economies have shifted in recent years towards communication as their primary policy tool to influence exchange rates. The paper assesses the effectiveness of communication, or oral interventions, by the G3 monetary authorities. It provides two key findings. First, G3 communication policies have constituted an effective policy tool in influencing exchange rates in the desired direction. And second, communication has been effective independently from the stance and direction of monetary policy and the occurrence of actual interventions. By contrast, the effectiveness of communication is strongly related to the degree of uncertainty and the positioning of participants in FX markets. Taken together, the results provide support for micro-based approaches to exchange rate modeling and are consistent with the argument that interventions affect exchange rates primarily through a coordination channel rather than a signaling channel.     

A non-parametric analysis of ERM exchange rate fundamentals

In this paper we present evidence concerning the number of common stochastic trends in three major ERM exchange rates. The results indicate the presence of a single common trend driving these currencies and from this we suggest that the common trend can be considered as the non-parametric fundamentals for the three selected currencies. Using a non-parametric technique, the Alternating Conditional Expectations (ACE) algorithm, we obtain evidence for the existence of non-linearities for two out of three currencies with a functional form, related to the estimated non-parametric fundamentals, close to the S-shape given by the basic target zone model.      

Volatility trade-offs in exchange rate target zones

The volatility trade-offs (i.e. the negative relationships between exchange rate variability and the interest rate differential) exhibited in the Krugman [Krugman, P. (1991). Target zones and exchange rate dynamics. Quarterly Journal of Economics, 106, 669–682.] model depend on the assumption of uncovered interest rate parity (UIP). However, the bands for several economies in Latin America and Eastern Europe are substantially different from those within the European Monetary System (EMS), in that their parity relationship deviates from UIP and volatility trade-offs do not exist. This paper develops a graphical exposition and uses it to show that the degree of capital mobility may serve as a plausible vehicle to explain the empirical evidence found in Krugman's regime of exchange rate target zones. Based on a Fleming-type stochastic macro model, we find that when capital mobility is relatively low, exchange rate variability exhibits a positive relationship with the interest rate differential. This result can be regarded as a possible way of resolving the conflicting outcomes between Krugman's prediction and existing empirical observations.     

Capital inflows, fiscal discretion, and exchange rate policy

Many writers have argued for the benefits of a credible fixed exchange rate (a hard peg) as a commitment device in an open economy. But historically, fixed exchange rates have often been associated with large current account deficits and episodes of ‘over-borrowing’. This paper develops a model of capital inflows that are linked to the exchange rate regime because of endogenous fiscal policy. The key message of the paper is that a hard peg is undesirable in the absence of commitment in fiscal policy. In face of a credible fixed exchange rate, the fiscal authority subsidizes capital inflows. The economy will engage in inefficiently high international borrowing, and in welfare terms may end up worse off than under capital market autarky. To eliminate the incentive to subsidize borrowing, the monetary authority must follow a flexible exchange rate rule in which capital inflows lead to exchange rate appreciation. If fiscal policy must be financed by money creation rather than direct taxation, then a fixed exchange rate rule may cause both over-borrowing and a subsequent exchange rate crisis.     

Trade liberalization,the exchange rate and job flows in Brazil

Brazil underwent a large trade liberalization process in the 1990s. Over the period, manufacturing employment decreased significantly, generating public debate on the need to revert liberalization. This paper aims to identify the actual effect of trade liberalization on employment, separating it from exchange rate movements using a gross job flow approach. Our novel dataset covers all sectors and formally registered enterprises, and we use new sector specific exchange rate data. Our estimates suggest that greater openness reduce jobs through increased job destruction, with no effect on job creation, but the exchange rate matters also. Depreciations expand the number of jobs in manufacturing by increasing creation, with no effect on destruction.     

Inflation,growth and exchange rate regimes in small open economies

Summary. This paper compares the merits of alternative exchange rate regimes in small open economies where financial intermediaries perform a real allocative function, there are multiple reserve requirements, and credit market frictions may or may not cause credit rationing. Under floating exchange rates, raising domestic inflation can increase production if credit is rationed. However, there exist inflation thresholds: increasing inflation beyond the threshold level will reduce domestic output. Endogenously arising volatility may be observed independently of the exchange rate regime. Private information - with high rates of domestic inflation - increases the scope for indeterminacy and economic fluctuations.Received: 26 March 2002, Revised: 29 October 2002JEL Classification Numbers: E32, E44, F33.P.L. Hernandez-Verme: I would like to thank Leonardo Auernheimer, Valerie Bencivenga, Dean Corbae, Scott Freeman, Todd Keister, Beatrix Paal, and Maxwell Stinchcombe for very helpful comments and suggestions. Very special thanks are due to Bruce D. Smith. The paper also benefited from the discussions in the seminars in CIDE, the Federal Reserve Bank of Atlanta, the Federal Reserve Bank of Kansas City, Indiana University, ITAM, Purdue University, the Second Annual Missouri Economics Conference, Texas A&M, the University of Missouri and the University of Texas at Austin.     

Estimating exchange rate dynamics with diffusion processes: an application to Greek EMU data

Recently various exchange rate models capturing the dynamics during the transition from an exchange rate arrangement of floating rates into a currency union have been derived. Technically, these stochastic equilibrium models are diffusion processes which have to be estimated by discretely sampled observations. Using daily exchange rate data prior to the Greek EMU-entrance on 1 January 2001, we develop a rigorous estimation procedure. Our estimates point to an increasing interventionist economic policy in the run-up to the Greek EMU entrance. A comparison of this econometric indication with policy information provided (ex-post) by the Bank of Greece (BoG) in its Annual Report 2000 reveals that the BoG indeed pursued such an active policy stance (so-called institutional frontloading strategies).      

Foreign equity option pricing under stochastic volatility model with double jumps

This paper considers the challenging problem advocated by Huang and Hung (2005), that is to incorporate the stochastic volatility into the foreign equity option pricing. Foreign equity options (quanto options) are contingent claims where the payoff is determined by an equity in one currency but the actual payoff is done in another currency. Huang and Hung (2005) priced foreign equity options under the Lévy processes. In Huang and Hung's paper, they considered jumps in the foreign asset prices and exchange rates and assumed the volatility as constant. However, many studies showed that constant volatility and jumps in returns are incapable of fully capturing the empirical features of equity returns or option prices. In this paper, the stochastic volatility with simultaneous jumps in prices and volatility is proposed to model foreign asset prices and exchange rates. The foreign equity option pricing formula is given by using the Fourier inverse transformation. The numerical results show that the use of stochastic volatility with simultaneous jumps in prices and volatility proposed to model foreign asset prices and exchange rates is necessary and this approach can help us to capture more accurately the foreign equity option prices.     

Orderly exits from adjustable pegs and exchange rate bands

This paper examines the exit process from adjustable pegs and exchange rate bands, and the role of capital flows in these exits. It dwells on the experience of various countries, including Chile, Colombia, Egypt, Israel, India, Poland, and Yemen. It begins by identifying conditions under which exits are sought. Next, it discusses the prerequisites for a successful exit, factors affecting the pace of exit, and the nature of the post‐exit regime. It then examines the behavior of private capital flows, interest rates, and official reserves before and after three successful exits (Chile, India, and Poland), and draws broad policy lessons.     

从贸易摩擦到汇率系统的国家利益冲突

本文由国际贸易理论中存在的多童均衡引发的国家利益冲突从而引起世界各国在国际贸易中面临国家竞争战略的机制这一论点出发,以美日两国国家竞争战略的机制选择为例,阐明汇率系统的冲突已经成为当前世界各国国家利益冲突的主要形式.这一研究结论为中国国家竞争战略的选择和制定提供了一种思路.     

Fundamentals, the exchange rate and prospects for the current and future EU enlargements: evidence from Bulgaria, Croatia, Romania and Turkey

We analyze the link between macroeconomic fundamentals and exchange rate dynamics in two new and two potential EU member states: Bulgaria, Romania, Croatia, and Turkey. Given the different institutional settings of the exchange rate market in the countries of interest, we follow two different modelling strategies. For Romania and Turkey, we evaluate possible exchange rate misalignments based on a monetary model of exchange rate determination. In the case of Bulgaria and Croatia, with currency board and narrow-band peg arrangements against the euro, we discuss possible exit strategies and quantitatively assess the effects of the peg arrangements by means of simulation.

The directions of FDI and the self-intensifying expectations of the exchange rate and the effectiveness of sterilized intervention

In this paper, we develop the Renminbi’s dynamic model to analyze the relationship between the flow directions of foreign direct investment (FDI) and the exchange rate’s expectations on the basis of distinguishing the real interest rate from the desired interest rate. We find that the exchange rate expectation has a self-intensifying mechanism, which could have a reverse effect on the country’s macroeconomic stabilization. We discuss the issue on how expectation impacts the macro economy and then analyze the conditions of successful intervention, which is helpful for policy management. __________ Translated from the The Journal of World Economy (世界经济), 2005, (7) (in Chinese)     

Nonlinear dynamics in exchange rate deviations from the monetary fundamentals: An empirical study

This paper reexamines empirical performance of the monetary exchange rate model with nonlinear dynamics of exchange rate deviation from the monetary fundamentals. First, we apply unit root test of Park and Shintani (2005) to post-Bretton Woods exchange rate data and able to reject the null of unit root deviation from monetary fundamentals against alternative hypothesis of nonlinear stationary process for deutschemark, pound, and Swiss franc. Our empirical results find that exchange rates show high degree of mean-reversion with larger deviation and long periods of overvaluation and undervaluation of dollar. We also find empirical evidence of predictability of the monetary fundamentals at longer horizons.     

Invoice currency choice,nonlinearities and exchange rate pass-through

ABSTRACT

Estimating time-varying thresholds as a proxy for exporter’s predicted exchange rates, this study proposes a new approach to analyse possible asymmetric behaviour of exchange rate pass-through (ERPT) or pricing-to-market (PTM) in Japanese exports between yen appreciation and depreciation periods. Constructing the industry-specific nominal effective exchange rate on a contract (invoice) currency basis, we perform the multivariate threshold near-vector autoregressive (near-MTVAR) estimation and reveal a strong tendency of symmetric ERPT in the short-run, between yen appreciation and depreciation periods. From the 2000s, however, Japanese machinery exporters increased the degree of PTM even in the long-run, while other industries raised the degree of long-run ERPT, reflecting the difference of product differentiation across industries. This evidence has significant implications for the recent unresponsiveness of the Japanese trade balance to the large depreciation of the yen.     

The choice of exchange rate regime: An empirical analysis for transition economies*

We analyze the choice of exchange rate regimes of the 25 transition economies in Europe and the CIS after 1990. The empirical results show that the traditional Optimum Currency Area considerations provide relevant guidance for the regime choices in these countries. Moreover, regime choices are influenced by inflation rates, cumulative inflation differentials, and international reserves sufficiency. That is, macroeconomic stabilization and the ability to commit to exchange rate pegs also play important roles. Large government deficits have ambiguous effects; they increase the likelihood of moving from flexible to intermediate regimes as well as that of moving from fixed to intermediate ones.