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.     

货币政策目标和篮子货币最优权重的选取——基于贸易收支稳定的视角

本文首先建立模型分析在使贸易收支变动方差最小化条件下,汇率指数最优权重的选取,也就是把汇率指数的构建和货币政策的目标结合起来。本文构建了国际收支变动关于篮子货币权重的理论模型,根据贸易收支方差波动最小获得篮子货币的最优权重。进一步,本文对最优权重进行了数值模拟分析,得到出口或进口稳定的最优篮子货币的权重,在此基础上,本文模拟了人民币对美元汇率的走势,并比较了有效汇率稳定目标下篮子货币的权重和人民币对美元汇率的变化。结合宏观经济政策目标重新确定参考篮子货币汇率指数权重,有利于完善和建立参考一篮子货币的汇率制度,为篮子货币制度制定提供理论指导。     

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.     

Fear of appreciation in East and Southeast Asia: The role of the Chinese renminbi

Our study brings into light evidence of the important role of the Chinese renminbi in shaping the exchange rate behavior of a select group of East Asian currencies. Results obtained suggest that there is an additional dimension to the ‘fear of appreciation’ or ‘fear of floating-in-reverse’ behavior, initially coined by Levy-Yeyati and Sturzengger (2007) with regard to the experiences of this group of East Asian currencies. In particular, we find that there is a greater degree of aversion to appreciation of these East Asian currencies—specifically, the Philippine peso and the Thailand baht—against the Chinese renminbi than against the US dollar. This heightened fear of appreciation against the Chinese currency confirms that trade competition matters in this part of the world and that this fear to appreciate plays a central role in the exchange rate management of major East Asian currencies. As envisaged, the increasing role of China as a major trading hub in the region as well as globally, implies that the Chinese renminbi would exert a growing significant influence on other currencies in the region.     

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.     

跨境贸易以人民币结算:路径选择与风险

跨境贸易以人民币结算是人民币国际化的基石,本文重点分析了对外贸易结算货币的不同组合及其对贸易差额的影响,对现阶段中国跨境贸易结算货币的特征进行了讨论。研究发现,中国政府大力推进跨境贸易以人民币作为结算货币,在进口方面将使得国内的进口企业无法利用人民币升值减少实际支出。在出口方面,人民币结算比重的扩大将减缓外汇储备的增长速度,但与保出口的宏观经济目标相冲突,同时这一政策导向对中国企业的出口竞争力也提出了更大的挑战。     

A tale of Asian exchange rate management: Romance of the three currencies

Asian currencies lack regional policy coordination and are therefore subject to volatilities such as the Asian currency crisis of 1997/99. As the Asian currencies have already been observed to be ‘flying-in-unison’, a stable exchange rate arrangement can be helpful as the next step of evolution for regional financial stability. We consider that creating a cluster effect from coordinated efforts/policies of policy-makers can lead to regional exchange rate stability. To demonstrate this cluster effect, a three-party-game is computed for an Asian bloc, viz-á-viz US dollar and the Euro, based on a Nash and a cooperative equilibrium. The cluster effect would generate external and internal pressures that work towards the formation of a regional currency, although the exact form of exchange rate regime would have to await political consensus. There are substantial welfare gains within Asia network economy through currency cooperation. The formation of an Asian currency bloc would also create counter-balance to the current dominance of the US dollar and the Euro. Like the epic story of Three Kingdoms who sought hegemony in Chinese history, the Asian currency bloc will contend with many possible outcomes of competition as well as cooperation.     

Is Asian Currency Unit Attractive to East Asian Economies？

Pegging the RMB exchange rate to the Asian currency unit (ACU) has not, at least in the short term, been proved a better solution than pegging to the US dollar or pegging to a G‐3 (US$, Japanese yen and euro) currency basket. Although the Asian currency unit can help Asian economies to keep the relative price of regional currencies stable, the cost of joining a formal regional monetary cooperation is the relinquishment of the autonomy of their domestic policies. Asian monetary cooperation needs to provide more potential benefits if it is to attract Asian economies. We argue that Asian monetary cooperation should be designed to solve the problem of regional trade imbalance, and regional exchange rate policy coordination should be adopted as the first step towards exchange rate cooperation. (Edited by Zhinan Zhang)     

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.     

Invoicing currency and the optimal basket peg for East Asia: Analysis using a new open economy macroeconomic model

An important characteristic of trade in Asia is that the US dollar is the dominant invoicing currency. This fact might have a consequence on the region's choice of the currency regime. To investigate this possibility, I develop a three country “new open economy macroeconomics” model that consists of East Asia, Japan, and the US. Assuming that East Asia pegs its currency to a basket of the other two's currencies, the optimal basket weights are derived numerically. It is shown that the weights under a realistic invoicing pattern are drastically different from those in the textbook case of “producer currency pricing.” J. Japanese Int. Economies 20 (4) (2006) 569–589.     

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.     

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.     

Monetary Integration In Eastern And Southern Africa: Choosing A Currency Peg For Comesa

African countries involved in monetary integration projects have been advised to peg their currencies against an external anchor before the definite fixing of exchange rates. In this study, we estimate optimum currency area indices to determine, between four alternatives, which international currency would be the most suitable anchor for Common Market for Eastern and Southern Africa (COMESA) members and for a set of other selected African economies. We conclude that the euro and the British pound prevail over the US dollar or the yen; that the euro would be the best pegging for most, but not all, COMESA members; and that some of these economies display evidence of more intense integration with third countries, with which they share membership in other (overlapping) regional economic communities, than within COMESA.     

Yen bloc or koala bloc? Currency relationships after the East Asian crisis

During the 1990s, several studies found evidence for a “yen bloc”, a significant and strengthening relationship between the Japanese yen and East Asian currencies possibly due to regional trade and investment by Japan. It appears that the Australian dollar now plays a similar role in the East Asian region, and the linkages between the Australian dollar and the Asian currencies show as much support for a “koala bloc” as a “yen bloc”. This study concludes that the US dollar appears to have declined in importance in post-1997 crisis East Asia, while Australia and Japan are becoming increasingly important regional influences.     

Measuring currency pressures: The cases of the Japanese yen,the Chinese yuan,and the UK pound

We investigate bilateral currency pressures against the US dollar for three currencies: the Japanese yen, the Chinese yuan, and the UK pound during the period 2000:Q1 to 2009:Q4. We employ a model-based methodology to measure exchange market pressure over the period. Conversion factors required to estimate the pressure on these currencies are computed using a time-varying coefficient regression. We then use our measures of currency pressures to assess deviations of exchange rates from their market-equilibrium levels. For the yen, our measure of currency pressure suggests undervaluation during the initial part of our estimation period, a period during which the Bank of Japan sold yen in the foreign exchange market. We find persistent undervaluation of the yuan throughout the estimation period, with the undervaluation peaking at about 20% in 2004 and 2007. For the pound, the results indicate low pressure – suggesting a mainly free-floating currency – throughout the sample period. These results appear consistent with the policies pursued by the central banks of the currencies in question.     

The Case for Stabilizing China＇s Exchange Rate： Setting the Stage for Fiscal Expansion

China＇s financial conundrum arises from two sources. First, its large saving （trade） surplus results in a currency mismatch because it is an immature creditor that cannot lend in its own currency. Instead, foreign currency claims （largely US dollars） build up within domestic financial institutions. Second, economists, both American and Chinese, mistakenly attribute the surpluses to an undervalued RMB. To placate the USA, the result was a gradual and predictable appreciation of the RMB against the dollar of 6 percent or more per year from July 2005 to July 2008. Together with the fall in US interest rates since mid-2007, this one- way bet in the foreign exchanges markets not only attracted hot money inflows but inhibited private capital outflows from financing China＇ s huge trade surplus. Therefore, the People＇s Bank of China had to intervene heavily to prevent the RMB from ratcheting upwards, and so became the country＇s sole international financial intermediary as official exchange reserves exploded Because of the currency mismatch, floating the RMB is neither feasible nor desirable, and a higher RMB would not reduce China＇ s trade surplus. Instead, monetary control and normal private-sector finance for the trade surplus require a return to a credibly fixed nominal RMB/USD rate similar to that which existed between 1995 and 2004. However, for any newly reset RMB/USD rate to be credible as a monetary anchor, foreign ＂China bashing＂ to get the RMB up must end. Then the stage would be set for fiscal expansion to both stimulate the economy and reduce its trade surplus.     

新疆边贸结算货币存在的问题与对策

边贸结算的人民币化是国家推动人民币周边化、区域化,以实现国际化的路径之一。但是,新疆边贸结算货币在国家外汇管理局启动边贸本币结算的五年之后,美元依旧是最主要的结算货币,与其他边贸省份形成了较大反差。因此,本文在深入分析新疆边贸结算货币存在问题及原因的基础上,提出了推动新疆边贸结算人民币化的对策建议。     

Southeast Asian monies and the problem of a common measure,with particular reference to the nineteenth century

From the early seventeenth to the late nineteenth century, the Mexican silver dollar was accepted as a common currency of Southeast Asia, though local governments issued their own dollars based on it. The decline of the value of silver relative to gold after 1870 introduced a gradual shift to official currencies pegged to a gold standard in Europe.     

Vertical trade and China's export dynamics

This paper examines how China's exports are affected by exchange rate shocks from countries that supply intermediate inputs to China. We build a simple small open economy model with intermediate goods trade to show that due to the intra-regional trade in intermediate goods, a devaluation of other Asian currencies does not necessarily hurt China's exports, as imported intermediate goods could become cheaper. The effect of intermediate goods costs depends critically on the share of intermediate goods used in China's export goods production and the degree of exchange rate pass-through in imported intermediate goods prices. If prices for intermediate goods are not very sticky, the effect through this channel could be large, and China's exports could even benefit. We find that these findings do not depend on China's choice of currency invoicing between the RMB and the US dollar or the choice between fixed and flexible exchange rate regimes.     

IT MAY BE OUR CURRENCY,BUT IT'S YOUR PROBLEM

The dollar's dominance of international transactions and role as a reserve currency is an exorbitant privilege that is a burden as well as a blessing for the US. It achieved this dominance early in the twentieth century, quite quickly in fact; it may also see that status change equally quickly were the world to move to a multipolar system of currencies. Among the most likely candidates for reserve currencies in such a world are the dollar, the euro, and the Chinese renminbi, Barry Eichengreen explained in his Butlin Lecture earlier in 2011.