经济学家
經濟學傢
경제학가
Economist
2015年
3期
56~64
,共null页
外汇储备 币种结构 优化
外彙儲備 幣種結構 優化
외회저비 폐충결구 우화
Foreign exchange reserves; Structure of the types of currencies; Optimization
本文通过对现有外汇储备币种结构文献的分析,分为考虑与不考虑预期3月进口用汇与短期外债用汇两种情况,分别利用资产组合理论,借助MATLAB求出4种外币的10年期与3月期8种政府债券组合。研究结果显示:考虑汇率变化导致持有外币资产收益变化的建模与计算分析发现:(1)为满足偿还短期外债与最近3月进口的用汇的需要,最好采用限制币种最低持有比例的情形,在风险发生突变并且迅速增加收益几乎不变的点为外币资产组合的最佳点,即有效前沿的转折点处:(2)就中国目前的外债与进出口状态而言,相对安全又具有合理收益的外汇储备资产的比例如下:英国3个月国库券为10.73%,10年期欧元债券为1.52%,3月期欧元债券为6.2%,3月期日本国债为5.65%,3月期美国国库券为75.91%,8种外币政府债券资产中的其余种类的比例均为0。
本文通過對現有外彙儲備幣種結構文獻的分析,分為攷慮與不攷慮預期3月進口用彙與短期外債用彙兩種情況,分彆利用資產組閤理論,藉助MATLAB求齣4種外幣的10年期與3月期8種政府債券組閤。研究結果顯示:攷慮彙率變化導緻持有外幣資產收益變化的建模與計算分析髮現:(1)為滿足償還短期外債與最近3月進口的用彙的需要,最好採用限製幣種最低持有比例的情形,在風險髮生突變併且迅速增加收益幾乎不變的點為外幣資產組閤的最佳點,即有效前沿的轉摺點處:(2)就中國目前的外債與進齣口狀態而言,相對安全又具有閤理收益的外彙儲備資產的比例如下:英國3箇月國庫券為10.73%,10年期歐元債券為1.52%,3月期歐元債券為6.2%,3月期日本國債為5.65%,3月期美國國庫券為75.91%,8種外幣政府債券資產中的其餘種類的比例均為0。
본문통과대현유외회저비폐충결구문헌적분석,분위고필여불고필예기3월진구용회여단기외채용회량충정황,분별이용자산조합이론,차조MATLAB구출4충외폐적10년기여3월기8충정부채권조합。연구결과현시:고필회솔변화도치지유외폐자산수익변화적건모여계산분석발현:(1)위만족상환단기외채여최근3월진구적용회적수요,최호채용한제폐충최저지유비례적정형,재풍험발생돌변병차신속증가수익궤호불변적점위외폐자산조합적최가점,즉유효전연적전절점처:(2)취중국목전적외채여진출구상태이언,상대안전우구유합리수익적외회저비자산적비례여하:영국3개월국고권위10.73%,10년기구원채권위1.52%,3월기구원채권위6.2%,3월기일본국채위5.65%,3월기미국국고권위75.91%,8충외폐정부채권자산중적기여충류적비례균위0。
Through the analysis on the existing currency structure of foreign exchanges, we make two assumptions, i.e. consider or not consider exporting foreign exchanges and short-term foreign debts exchanges, use asset combination theory and MATLAB to get eight types of government debt combination with four foreign currencies in ten years and three months. The re- suits show that the modeling and calculation analysis which considers the changes in foreign exchange rate leading to the chang- es in the returns on the assets valued by foreign currencies suggest that: (1)to meet the demand of repaying short-term foreign debts and recent imports of foreign exchanges in three months, we' d better restrain the minimum proportion of currencies held. The point that risk occurs abruptly and increases rapidly while the returns remain unchanged could be the best point for the com- bination of foreign currency assets, i.e., the turning point of efficient frontier. (2) As for China' s foreign debt and export-import status quo, the proportions of the assets of foreign reserves with relative safety and rational returns are: three-month British trea- sury bill is 10.73%, ten-year, Euro bonds, l.52%, three-month Euro bonds,6.2%, three-month Japanese treasury bi11,5.65%, three-month U.S. treasury bi11,75.91%. The proportion of the rest types is zero.