Optimal currency shares in international reserves: The impact of the euro and the prospects for the dollar

Foreign exchange reserve accumulation has risen dramatically in recent years. The introduction of the euro, greater liquidity in other major currencies, and the rising current account deficits and external debt of the United States have increased the pressure on central banks to diversify away from the US dollar. A major portfolio shift would significantly affect exchange rates and the status of the dollar as the dominant international currency. We develop a dynamic mean-variance optimization framework with portfolio rebalancing costs to estimate optimal portfolio weights among the main international currencies. Making various assumptions on expected currency returns and the variance–covariance structure, we assess how the euro has changed this allocation. We then perform simulations for the optimal currency allocations of four large emerging market countries (Brazil, Russia, India and China), adding constraints that reflect a central bank's desire to hold a sizable portion of its portfolio in the currencies of its peg, its foreign debt and its international trade. Our main results are: (i) The optimizer can match the large share of the US dollar in reserves, when the dollar is the reference (risk-free) currency. (ii) The optimum portfolios show a much lower weight for the euro than is observed. This suggests that the euro may already enjoy an enhanced role as an international reserve currency (“punching above its weight”). (iii) Growth in issuance of euro-denominated securities, a rise in euro zone trade with key emerging markets, and increased use of the euro as a currency peg, would all work towards raising the optimal euro shares, with the last factor being quantitatively the most important. J. Japanese Int. Economies 20 (4) (2006) 508–547.     

Evidence of long-run purchasing power parity: analysis of real asian exchange rates in terms of the Japanese yen

In this paper we find strong new evidence in favour of the long-run purchasing power parity (PPP) hypothesis in the bilateral real exchange rates between the Japanese yen and the currencies of the most important southeast Asian economies only when the presence of several possible structural breaks of the series is taken into account. Such evidence for PPP is weaker for these southeast Asian exchange rates with the US dollar, the German mark and the Australian dollar.     

Asian Currency Crisis and the Generalized PPP: Evidence from the Far East

The present paper investigates the effects of the Asian currency crisis of 1997–1998 on the generalized PPP between several real exchange rates of the Far East countries. Monthly log of real exchange rates of the currencies of Thailand, Malaysia, Indonesia, the Philippines and South Korea vis-à-vis the US dollar and the Japanese yen during 1990–2004 are applied in the investigation. Further tests are conducted between exchange rates vis-à-vis the Thai baht. Tests are conducted for periods before and after the crisis. Results from the Johansen method of multivariate cointegration show a substantial change in the relationship between these real exchange rates before and after the Asian currency crisis. This result is found using rates based on three currencies: US dollar, yen and baht.     

Stabilization of effective exchange rates under common currency basket systems

We investigate the extent to which a common currency basket peg would stabilize effective exchange rates of East Asian currencies. We use an AMU (Asian Monetary Unit), which is a weighted average of ASEAN10 plus 3 (Japan, China, and Korea) currencies, as a common currency basket to investigate the stabilization effects. We compare our results with another result on stabilization effects of the common G3 currency (the US dollar, the Japanese yen, and the euro) basket in the East Asian countries [Williamson, J., 2005, A currency basket for East Asia, not just China. In: Policy Briefs in International Economics, No. PB05-1. Institute for International Economics]. We obtained the following results: first, the AMU peg system would be more effective in reducing fluctuations of the effective exchange rates of East Asian currencies as a number of countries applied the AMU peg system increases in East Asia. Second, the AMU peg system would more effectively stabilize the effective exchange rates than a common G3 currency basket peg system for four (Indonesia, the Philippines, South Korea, and Thailand) of the seven countries. The results suggest that the AMU peg system would be useful for the East Asian countries whose trade weights on Japan are relatively higher than others. J. Japanese Int. Economies 20 (4) (2006) 590–611.     

Currency intervention and the global portfolio balance effect: Japanese lessons

This paper extends the analysis of Bernanke et al. (2004) to show that the official Japanese purchases of foreign exchange in 2003–04 seem to have lowered long-term interest rates not only in the United States, but in a wide range of countries, including Japan. It seems that this decline was triggered by the investment of the intervention proceeds in US bonds and that global portfolio rebalancing spread the resulting decline in US dollar yields to bond markets in other currencies, thus easing global monetary conditions. We also show that the global portfolio balance effect is detectable in the response of yields to large Japanese intervention in data before and after 2003/04, though the effect is weaker. While our findings contribute to a growing body of work that points to common responses across bond markets to official portfolio shifts in the form of large-scale bond purchases (“quantitative easing”), our analysis has the advantage of focusing on a pure portfolio shock.     

Effects of Exchange Rates on Debt, Debt Services and Public Debt Management in Thailand in the 1980s

This paper attempts to evaluate the effects of exchange rates on debt, debt services, and public debt management in Thailand in the 1980s. A simple differentiation technique is used to decompose the changes in debt and debt services into 'management' and 'exchange rates' effects. The latter became more pronounced in the second half of the 1980s largely because of the increased volatility in exchange rates among key currencies. The public sector responded to these changes by adjusting the debt portfolio through new commitment and refinancing, as well as restricting the level of external debt. As a result, a significant amount of debt services was saved in 1989, when the exchange rates among major currencies began to settle down, although the same adjustments initially led to temporary increases in the levels of debt and debt services during the mid-1980s.
Moreover, the diversified structure of public external debt made it possible to compensate a change of debt or debt service in one currency denomination by a counter change of those in another currency denomination. Such a compensating relationship (e.g. between Yen and US dollar during 1985–87) helped stabilise the effects of exchange rates. The baht is now pegged to a basket of currencies. In theory the effects of exchange rates may be completely neutralised if the debt portfolio reflects the weight of each currency in the basket. Such relationships may be incorporated to improve the efficiency of public debt management.     

Exchange rates,global imbalances,and interdependence in East Asia

The paper analyzes East Asian interdependence in the face of global imbalances. A macro-econometric multinational model is used, describing Korea, Japan, China and the rest of East Asia in their respective relations with the United States as well as with the rest of the world. US imbalances and their expected consequences, notably a depreciation of the dollar and the slowdown of US demand, have rather contrasted effects on East Asian economies, depending on relative magnitudes of the two components. Korea is more affected by the dollar depreciation while China is more exposed to the US slowdown. Japan, less open and less dependent on the US market, is less touched. The correction of East Asian exchange-rate misalignments, which have prevailed since the beginning of the 2000s, would badly affect East Asian economies if undertaken too abruptly. Lastly, the perspective of creating an area of stabilised exchange rates between won, yen and other currencies, organized either as a common currencies basket system or in a regime based on the ACU, is explored preliminarily. Sets of simulations comparing adjustment mechanisms between East Asian countries, with or without the possibility of monetary adjustment, illustrate the cost of precluding exchange-rate adjustments in the case of asymmetric demand shocks.     

Managing the renminbi: should China peg to a trade‐weighted basket?

Pegging the renminbi (RMB) to the US dollar since 1994 has characterised China's exchange rate policy under a fixed peg or appreciating crawling peg. The current policy, announced in June 2010, of ‘floating with reference to a basket’ made the RMB 25 per cent stronger against a trade‐weighted basket by early August 2015, while it was 10 per cent stronger against the US dollar. Thus, 14 percentage points arose from changes in the cross rates of the other currencies, notably from the fall of the euro since December 2014. Devaluation of the RMB by 3 per cent in August 2015 just covered the effective appreciation since December 2014. Effects of the cross rates of other currencies could be eliminated by managing the external value of the RMB with reference to a genuine trade‐weighted basket. This could be a suitable intermediary exchange rate regime for China, as the risks associated with free floating are still great. Diversifying further the currency composition of the foreign exchange reserves and other foreign assets of the Chinese government, from US dollars towards euro and yen assets, would be a natural parallel shift. The euro–US dollar–yen exchange rates in late summer 2015 may offer a good opportunity to carry out this move.     

The Yen,the US dollar,and the trade weighted basket of currencies: Does the choice of anchor currencies matter in identifying incidences of speculative attacks?

Early constructions of a single crisis index known as the exchange market pressure (EMP) index have largely been based on the fluctuations of the real or nominal exchange rate of a currency against the US dollar—the most commonly accepted anchor currency in the global market. Hardly any studies have however tested the sensitivity of this crisis index to the choice of different “anchor” currencies. To address this pertinent issue, our study considers the EMP indices of the Indonesian rupiah, Malaysian ringgit and Thailand baht constructed by adopting three different exchange rates—the real effective rate, the local currency against the US dollar, and the local currency against the Japanese yen for the period of 1985–2003. The test results indicate that the reported incidences of speculative attacks are highly sensitive to the choice of anchor currencies.     

Dominant Currencies and the Future of the Euro

The paper's thesis is that the US dollar, despite the inevitable erosion of market share that it will suffer at the hands of the euro, will remain the most important international currency. The transaction domain of an international currency depends on its ability to lower transaction costs relative to alternative currencies. The EMU financial markets will not be as integrated, and thus as liquid, as the US financial markets for quite some time, thus favoring the use of the dollar as a medium of exchange. Inertia and reputational considerations further favor the dollar. The future value of the exchange rate dollar-euro will depend on economic fundamentals more than on portfolio shifts. Portfolio shifts argue for an appreciation of the euro; but fundamentals can swamp the effects of portfolio shifts. Should the EMU fundamentals reflect the spirit of the Maastricht Treaty and the Growth and Stability Pact, the chances for a euro appreciation will increase. Some caution, however, is in order because the ECB is a new and untested central bank where consensus for a conservative policy may be harder to achieve than can be gleaned from a literal reading of the Maastricht Treaty.     

Adopting external currencies for trade growth in the Pacific

This article reviews the currency and trade experiences of the six Pacific states that issue their own currencies: Fiji, Papua New Guinea (PNG), Samoa, Solomon Islands, Tonga, and Vanuatu. At independence, these states were advised to adopt their own currencies by the colonial powers, the International Monetary Fund, and other international organisations. The former imperial countries dominated Pacific trade, but empirical data indicate that a large and increasing proportion of trade, now with emerging Asia, denominates its trade in US dollars. This article shows that the six Pacific states manage their currencies in relation to the US dollar. Optimal currency area theory suggests that independent Pacific states would gain substantially by adopting the US dollar in the place of their own currencies. Gravity‐model estimations for all Pacific islands were used to test this hypothesis. The results suggest that replacing their own currencies with an external currency, such as the US dollar, would substantially stimulate the independent Pacific states' trade.     

Capital flows and real exchange rates in emerging Asian countries

This paper examines the impact of capital flows on real exchange rates in emerging Asian countries during 2000–2009 using a dynamic panel-data model. The estimation results show that the composition of capital flow matters in determining the impact of the flows on real exchange rates. Other forms of capital flow, especially portfolio investment, bring in a faster speed of real exchange rate appreciation than foreign direct investment (FDI). However, the magnitude of appreciation among capital flows is close to each other. The increasing importance of merger and acquisition (M&A) activities in FDI in the region makes these flows behave closer to other forms of capital flow. The estimation results also show that during the estimation period, capital outflows bring about a greater degree of exchange rate adjustment than capital inflows. This evidence is found for all types of capital flow. All in all, the results indicate that the swift rebound of capital inflows into the region could result in excessive appreciation of (real) currencies, especially when capital inflows are in the form of portfolio investment.     

Stock market uncertainty and uncovered equity parity deviation: Evidence from Asia

Recently, many empirical studies document that a country's stock market performance relative to the US and its local currency units per US dollar tend to move in opposite direction over the short run, also known as the uncovered equity parity (UEP) condition. However, those studies have applied only to advanced economies to date. This study conducted the same tests to a sample of 18 Asian economies. To one's surprise, we found that the UEP condition reverses its sign among Asian currencies. In addition, measures of stock market uncertainty are suggested as a potential driving force behind this UEP reversal for Asian economies. This surprising result suggests that there might be other mechanisms behind the joint dynamics of equity and currency returns than the portfolio rebalancing caused by incomplete foreign exchange risk hedging. The reasoning is that Asian foreign exchange (FX) markets are even more subject to incomplete foreign exchange risk hedging. Thus, one should expect even stronger UEP evidence from Asian currency markets if the portfolio rebalancing mechanism was the only force at play.     

The ASEAN dollar standard in the post-crisis era: A reconsideration

This paper examines the role of global currencies in ASEAN exchange rate regimes. The investigation considers the post-crisis era from January 1, 1999 through December 31, 2007 and focuses on the five original members of ASEAN (Indonesia, Malaysia, Philippines, Singapore, Thailand) plus Vietnam. Unlike most papers that use classical regression analysis of logarithmic data in first differences to detect the influence of various foreign currencies on particular Asian currencies, this paper considers modern time series analysis more seriously. In particular, this paper finds evidence of cointegration among individual ASEAN currencies and some of the global currencies, indicating a long-run relationship. Examination of the cointegrating vectors yields four main findings. First, there is a notable absence of a clear US dollar standard. Second, the yen is downright unimportant, suggesting that ASEAN currencies are quite far from a yen standard. Third, ASEAN currencies are also quite far from a euro standard. Fourth, and most surprisingly, the UK pound is very important. These results are at odds with the traditional (short-run) regressions which suggest that ASEAN is on a dollar standard, although it is not a perfect dollar standard because coefficients are not at unity and various other currencies are significant in different equations. Hence, the overall conclusion from this research is that there is a wide variety of influences on ASEAN exchange rates in both the long run and the short run. This suggests that ASEAN, as a group, is not pursuing – and is in fact not ready for – a global-currency standard.     

Forecasting the Euro exchange rate using vector error correction models

Forecasting the Euro Exchange Rate Using Vector Error Correction Models. — This paper presents an exchange rate model for the Euro exchange rates of four major currencies, namely the US dollar, the British pound, the Japanese yen and the Swiss franc. The model is based on the monetary approach of exchange rate theory which uses fundamental macroeconomic variables to explain the exchange rate. A crucial point when using such a model is its proper estimation through cointegration analysis. The euro exchange rate model is therefore estimated in the form of a Vector Autoregressive (VAR) model with cointegrating vectors (VECM). We find that when cointegration analysis is undertaken properly, the naive random walk prediction can be out-performed for the US dollar, the British pound and the Japanese yen, but not for the Swiss franc.     

Asset Market and Balance of Payments Characteristics: An Eclectic Exchange Rate Model for the Dollar,Mark and Yen

In this paper we use an exchange rate model, which combines asset market characteristics with balance of payments interactions, to examine the nominal effective exchange rates of the German mark, Japanese yen and US dollar for the recent experience with floating exchange rates. Our approach may be interpreted as one which attempts to flesh out the missing links that arise in conditioning an exchange rate solely on relative prices, as occurs in a standard PPP analysis. Amongst the results reported in this paper are: significant, and sensible, long-run relationships for the currencies studied; complex short-run dynamics; a variance decomposition analysis which apportions nominal exchange rate error variances into real and nominal elements.     

Exchange rates,stock prices,and money markets: evidence from Singapore

This paper uses a monetary approach to analyze the asymmetric asset-price movements (exchange rates and stock prices) in Singapore, a small open economy with managed exchange rate targeting. The Singapore dollar exchange rates vis-à-vis the developed countries’ currencies are negatively related to stock prices whereas the relationship between the Singapore dollar-Malaysian ringgit exchange rate and stock prices is positive instead. The pattern of asymmetry is explained by the relative exchange-rate elasticity of real money demand and real money supply and evidenced by the distributed-lag regression and VAR analysis. Furthermore, the distributed-lag regression of monthly data suggests that fiscal revenues as well as fiscal expenditures exert positive influences on stock prices.     

Currency Networks, Bilateral Exchange Rate Volatility and the Role of the US Dollar

We investigate monthly bilateral exchange rate volatility for a large sample of currency pairs over the period 1999?C2006. Pegs (particularly to the US dollar) and managed floats tend to have lower volatility than independent floats. A deeper investigation shows that the peg effect operates almost entirely through currency networks (i.e. where two currencies are pegged to the same anchor currency), and the lower volatility of US dollar pegs reflects the size of the US dollar network. Managed floats show clear evidence of tracking the US dollar, further increasing the effective size of the US dollar network. Inflation undermines the currency-stabilizing effect of peg networks. Currencies in smaller peg networks have higher unweighted but not trade-weighted exchange rate volatility, which is consistent with anchors being chosen to minimize trade-weighted volatility. The size of the effective US dollar network revealed here is a plausible explanation of the rarity of basket pegs. Volatility also reflects a range of structural factors such as country size, level of development, population density, inflation differentials and business cycle asymmetry.     

PPP: <Emphasis Type="Italic">Delusion</Emphasis> or <Emphasis Type="Italic">Reality</Emphasis>? Evidence from a Nonlinear Analysis

In this paper we analyze the validity of the purchasing power parity (PPP) in a nonlinear framework using data for 18 bilateral US dollar exchange rates. Following Enders and Ludlow (2002), we use unit root and cointegration tests that do not assume a specific nonlinear adjustment. We find evidence of non-linear mean reversion in deviations from the PPP equilibrium in 11 out of 18 currencies. Additionally, to disentangle the respective contribution of exchange rate and prices to the adjustment toward the long run equilibrium, we estimate a Vector Error Correction Model. According to our empirical analysis, there exists a nonlinear mechanism to correct for deviation from the PPP equilibrium that comes mainly from the exchange rates. This is consistent with theoretical arguments on international goods markets under transaction costs as well as with an emerging strand of empirical literature. These results highlight the importance of neglecting the possibility of nonlinearity in the debate about the PPP and provide empirical evidence that supports the scenario of the PPP hypothesis as a reality.     

Retrospect of the Chinese Exchange Rate Regime after Reform： Stylized Facts during the Period from 2005 to 2010

In the present paper, we estimate the de facto RMB exchange rate regime, the currency basket, the floating band and the foreign exchange market pressure before and after the reform of the Chinese exchange rate regime in 2005. We find the following stylized facts： the value of the RAIB became stable after the reform; the weight of the US dollar remained high in the basket, while other currencies remained statistically significant; and the floating band gradually increased to lO percent during 2005-2008, and then greatly narrowed from the late summer of 2008 under the assumption of a yearly resetting interval. We find that the foreign exchange market pressure increased from 2005 to 2008. A possible reason is that the weight of the US dollar in the basket was slightly lower than the share of the US dollar in total transactions on the Chinese foreign exchange market. Therefore, it is reasonable for China to adopt a dollar peg exchange rate regime.