
ãä¹±ç«ãã䞻匵ãšçè«ðããThe Effects of Japanese Foreign ExchangeIntervention: GARCH Estimation and Change PointDetectionãïŒå è¡ç 究解説 No.4ð 2023/09/18
IntroductionïŒåæ¥è«æã¯æ©ãã«ä»äžãããð
ç§ãããããåæ¥è«æã®å·çã«
åããããææããã£ãŠåããŸããð
äœäºãã¢ãŠããããåæã®ã€ã³ãããã
倧äºã§ãããšãnoteã§æ¯æ¥çºä¿¡ããŠããŸãã
ããã¯ãã©ã®ãããªå
容ã§
ãã£ãŠãåœãŠã¯ãŸããŸãð
è«æãäžæŠã«èªãã§ã
èšæ¶ã«æ®ã£ãŠããªãã£ãã
倧åãªèгç¹ãå¿ããŠããŸã£ãŠãããããã
åæ¥è«æã®é²æã¯æ»ã£ãŠããŸããšæããŸã
ã ããããããã®ãnoteãããã«æŽ»çšããŠ
åæ¥è«æã1ïŒ
ã§ã
宿ã«åããŠé²ããŠãããããšæããŸã
ç§ã®åè«å·çãžã®è»è·¡ã
ã©ãããæèªãã ããð
ä»åã®åèæç®ð¥
ä»åãèªã¿é²ããŠããè«æã¯
ãã¡ãã®URLã«ãªããŸãð
ãThe Effects of Japanese Foreign Exchange Intervention: GARCH Estimation and Change Point Detectionã
Eric Hillebrand Gunther Schnabl Discussion
Paper No.6 October 2003
èªã¿çµããå è¡ç ç©¶ð
ãæ¥æ¬ã®çºæ¿ä»å
¥ã®åæããäŒè€éæã»è
çµæžç ç©¶ãVol.54 No.2 Apr. 2003
ãEffects of the Bank of Japanâs intervention on yen/dollar exchange rate volatilityã21 November 2004
Toshiaki Watanabe (a), Kimie Harada (b)
ååã®ã埩ç¿ãð
The Effects of Japanese Foreign Exchange Intervention: GARCH Estimation and Change Point Detection
Eric Hillebrand Department of Economics, Louisiana State University
Gunther Schnabl Department of Economics and Business Administration, Tuebingen
2. Theoretical and Empirical Backgroundâ¡
The impact of foreign exchange intervention on volatility in foreign exchange markets has also been discussed.
Assuming rational expectations Dominguez (1998) suggests that fully credible and unambiguous sterilized foreign exchange intervention can reduce volatility in efficient foreign exchange markets.
Based on a stochastic model with chartists and fundamentalists, De Grauwe and Grimaldi (2003) show that systematic sterilized intervention can be effective by reducing noise generated by chartist forecast rules.
Jeanne and Rose (2002) assume endogenous noise trading and argue that it is possible to reduce exchange rate volatility without sacrificing monetary autonomy.
å€åœçºæ¿ä»å ¥ããå€åœçºæ¿åžå Žã®ãã©ãã£ãªãã£ã«åãŒã圱é¿ã«ã€ããŠãããŸããŸãªè°è«ããããŠããŸãð
åççãªæåŸ
ãä»®å®ãããšãDominguez (1998) ã¯ãå®å
šã«ä¿¡é Œã§ããã¯ã£ãããšäžèåãããå€åœçºæ¿ä»å
¥ã§ããã°ãå¹ççãªå€åœçºæ¿åžå Žã®ãã©ãã£ãªãã£ãäœæžã§ããããšã瀺åããŠããŸãð
De GrauweãšGrimaldi (2003)ã¯ããã£ãŒãã£ã¹ã掟ãšãã¡ã³ãã¡ã³ã¿ã«ãºæŽŸã«ãã確çã¢ãã«ã«åºã¥ãã°ããã£ãŒãã®äºæž¬ã«ãŒã«ã«ãã£ãŠçæããããã€ãºãäœæžããããšã«ãããäœç³»çãªäžèåä»å
¥ãçºæ¿ã¬ãŒãã«å¯ŸããŠæå¹ã§ããããšã瀺ããŠããŸãð
ãŸããJeanne and Rose (2002) ã¯ãå
ççãªãã€ãºååŒãæ³å®ããäžã§ãé貚ã®èªåŸæ§ãç ç²ã«ããããšãªããçºæ¿ã¬ãŒãã®ãã©ãã£ãªãã£ãäžããããšãå¯èœã§ãããšäž»åŒµããŠããŸãâš
In contrast, Schwartz (1996) contends that foreign exchange intervention is an âexercise in futilityâ which is likely to increase uncertainty and volatility.
Bonser-Neal and Tanner (1996) support Schwartzâs analysis using implied volatilities of currency option prices, with which they find that Japanese foreign exchange intervention increased the volatility in the yen/dollar foreign exchange markets during the period from 1987 to 1991.
Galati and Melick (1999) contend for the period from 1993 to 1996 that Japanese foreign exchange intervention has increased foreign exchange tradersâ uncertainty regarding future exchange rate movements.
Watanabe and Harada (2001) apply a component GARCH model to Japanâs foreign exchange intervention between 1990 to 2000 and find a significant effect on short-term but not on long-term yen/dollar volatility.
ãããŸã§ã®çè«ãšã¯å¯Ÿç
§çã«ãSchwartz (1996) ã¯ã以äžã®ãããªäž»åŒµãããŠããŸã
çºæ¿ä»å
¥ã¯äžç¢ºå®æ§ãšãã©ãã£ãªãã£ãå¢å€§ãããå¯èœæ§ãé«ããç¡çãªè¡çºãã§ãããšçµè«ã¥ããŠããŸã
Bonser-Neal ãš Tanner (1996) ã¯ãé貚ãªãã·ã§ã³äŸ¡æ Œã®æé»ã®ãã©ãã£ãªãã£ã䜿çšããã·ã¥ã¯ã«ãã®åæãæ¯æããŠããããã®åæã«ãããæ¥æ¬ã®å€åœçºæ¿ä»å
¥ã1987幎ãã1991å¹Žã®æéã«å/ãã«å€åœçºæ¿åžå Žã®ãã©ãã£ãªãã£ãå¢å€§ãããããšãçºèŠããŸããð
ãŸãGalatiãšMelick (1999) ã¯ã1993幎ãã1996幎ãŸã§ã®æéãæ¥æ¬ã®å€åœçºæ¿ä»å
¥ã«ããå°æ¥ã®çºæ¿ã¬ãŒãã®å€åã«é¢ããå€åœçºæ¿ãã¬ãŒããŒã®äžç¢ºå®æ§ãå¢å€§ãããšäž»åŒµããŠããŸã
ãããŠã枡蟺ãšåç°ïŒ2001ïŒã¯ãã³ã³ããŒãã³ãGARCHã¢ãã«ã 1990 幎ãã2000 幎ãŸã§ã®æ¥æ¬ã®å€åœçºæ¿ä»å
¥ã«é©çšãã以äžã®ç ç©¶ææããŸãšããŸãã
ããªãã¡ãçºæ¿ä»å ¥æ¿çãçæçãªå/ãã«ã®ãã©ãã£ãªãã£ã«ã¯å€§ããªåœ±é¿ãäžããäžæ¹ã§ãé·æçãªå/ãã«ã®ãã©ãã£ãªãã£ã«ã¯å€§ããªåœ±é¿ãäžããªãã£ãããšããçºèŠããã®ã§ã
All in all, although Sarno and Taylor (2001: 862) argue that the recent literature gives more evidence in favor of effectivenessâthe theoretical and empirical evidence for the effects of foreign exchange intervention on the level and volatility of the yen/dollar exchange rate remains mixed.
The stylized facts about Japanese foreign exchange intervention give evidence for both sides. The frequent intervention of the Japanese Ministry of Finance in the yen/dollar market might be taken as an indicator of success since repeated failure would discourage intervention.
Also recently financial press reports might indicate a growing trust in the success of Japanese interventions.
But the persistence of Japanese foreign exchange intervention also indicates that the effect was not lasting.
å
šäœãšããŠãSarnoãšTaylor (2001: 862) ã¯ãæè¿ã®æç®ã¯æå¹æ§ãæ¯æããããå€ãã®èšŒæ ãã€ãŸãå/ãã«çºæ¿ã¬ãŒãã®ã¬ãã«ãšãã©ãã£ãªãã£ã«å¯Ÿããå€åœçºæ¿ä»å
¥ã®åœ±é¿ã«ã€ããŠã®çè«çããã³çµéšç蚌æ ãæäŸããŠãããšäž»åŒµããŠããŸãããçµæžåŠçãªã³ã³ã»ã³ãµã¹ã¯äŸç¶ãšããŠæ··åãããŸãŸã§ãããšããç¶æ
ã«ãªããŸã
æ¥æ¬ã®çºæ¿ä»å
¥ã«é¢ããå®ååãããäºå®ã¯ãåæ¹ã«èšŒæ ãäžããŠããŸã
æ¥æ¬ã®è²¡åçããå/ãã«åžå Žã«é »ç¹ã«ä»å
¥ããããšã¯ãæåã®ææšãšã¿ãªããããããããŸãã
ãªããªãã°ã倱æãç¹°ãè¿ããããšãä»åŸã®ä»å
¥ã劚ããããããã§ã
ãŸããåœæã®çµæžå ±éã«ããã°ãæ¥æ¬ã®ä»å
¥ã®æåã«å¯Ÿããä¿¡é Œãé«ãŸã£ãŠããããšã瀺ããŠããå¯èœæ§ããããšèšãããŠããŸãã
ããããæ¥æ¬ã®çºæ¿ä»å ¥æ¿çãããããçºæ¿ã¬ãŒããžã®ã€ã³ãã¯ãã¯ãããŸãæç¶ããªãã£ãããšã瀺ããŠããã®ã§ãð
æ¬æ¥ã®è§£èª¬ã¯ããããŸã§ãšããŸã
ãã®ãããªæŽå²ãå
è¡ç ç©¶ããã£ããçè§£ããäžã§ãåæ¥è«æå·çã«åãçµãã§ããããã§ã
ä»åãç§ãåæ¥è«æå·çã«ãããŠåãäžãã
24幎ã¶ãã®ãå宿¯æ£ãä»å
¥ã¯æ¬åœã«ã¬ã¢ãªçµæžæ¿ç
ãšããããšãåèªèã§ãããããªæ°ãããŸãð
ç§ã®ç ç©¶ããŒãã«ã€ããŠð
ç§ã¯ãçºæ¿ä»å
¥ã®å®èšŒåæããããŒãã«
åæ¥è«æãå·çããããšèããŠããŸãð
æ¥æ¬çµæžãèãããšãã«ãçºæ¿ã¬ãŒãã«ãã£ãŠ
貿æååŒãçµåžžåæ¯ãå€åããã
æ ªã蚌åžã嵿š©ãšãã£ãéèè³ç£ã®åççã
å€åããããšæ¥æ¬çµæžãšçºæ¿ã¬ãŒããšã¯
åã£ãŠãåããªãçžãããã®ã§ãð
ïŒåðŽã ãã«ïœ¥ïœ¥ïœ¥ïŒ
çµæžã·ã§ãã¯ã«ãã£ãŠ
çºæ¿ã¬ãŒããå€åãããš
ãã®åœ±é¿ã¯ç§ãã¡ã®ç掻ã«å€§ãã圱é¿ããŸã
ã ãããããçºæ¿ã¬ãŒãã®å®å®æ§ã
æ
ä¿ãããããªçºæ¿ä»å
¥ã¯ãã¯ãçµæžæ¿çã«
ãããŠãéåžžã«éèŠãªæçŸ©ãæã£ãŠãããš
æšæž¬ããŠããŸã
決ããŠåŠéšçãæ¥œããŠå·çã§ãã
ç°¡åãªããŒããéžæããŠããããã§ã¯ç¡ããšä¿¡ããŠããŸã
ãã ããã®åæ¥è«æãããåãããšã
ç§ã®åŠççæŽ»ã®é倧æãšãªãããšã¯äºå®ãªã®ã§
æåŸãŸã§ã³ãã³ããšåãçµãã§åããŸãð¥
æ¬æ¥ã®è§£èª¬ã¯ã以äžãšããŸãð
ä»åŸãçµæžåŠçè«éãªãã³ã«
瀟äŒèª²é¡ã«å¯ŸããçµæžåŠçèŠç¹ã«ãã説æãªã©
ææçŸ©ãªå
容ãçºä¿¡ã§ããããã«
åªããŠãŸãããŸãã®ã§
ä»åŸãšãå®ãããé¡ãããŸãð¥º
ãã¬ãžã³ã®ã玹ä»ð
ãã¡ãã®ãã¬ãžã³ã«ãŠ
åæ¥è«æå·çãžã®è»è·¡
ãšãã»ã³ã·ã£ã«çµæžåŠçè«éããªãã³ã«
ãåœéçµæžåŠðãã®åºç€çè«ããŸãšããŠããŸã
ä»åŸãããã«ã³ã³ãã³ããæ¡å
ã§ããããã«åªããŠåããŸãã®ã§äœåãããããé¡ãç³ãäžããŸãð
æåŸãŸã§ãæèªããã ãèª ã«æé£ãããããŸããïŒ
ãããŸã§ãç§ã®èŠè§£ãæã£ãããšã
ãŸãšããããŠããã ããŠãŸãã
ãã®ç¹ã«é¢ããŸããŠããäºæ¿ãã ããð
ãã®æçš¿ãã¿ãŠãã ãã£ãæ¹ã
ã»ãã®å°ããªäºã§ãåŠã³ããã£ãïŒ
èãæ¹ã®åŒãåºããå¢ããïŒ
èªæžããåŠã¹ãããšãå€ãïŒ
ãªã©ãªã©ããã©ã¹ã®åç©«ããã£ãã®ã§ããã°
倧å€å¬ããæããŸãããæçš¿äœæã®å¥å©ã«å°œããŸãïŒïŒ
ãæ°è»œã«ã³ã¡ã³ããããããã¹ããð
ãããŠããå·®ãæ¯ããªããã°
ãã©ããŒïŒã·ã§ã¢ããé¡ããããã§ãð
ä»åŸãšãäœåãããããé¡ãããããŸãïŒ
ãã®èšäºãåå ããŠããåé
- #æ¥èš
- #note
- #èªæž
- #ãã³ã¬
- #æ¥æ¬
- #çžäºãã©ããŒ
- #ãã©ããŒ
- #çºæ¿
- #ããã
- #ã©ã³ãã³ã°
- #圱é¿
- #ã¹ãããã©ããŒãããããšãããããŸã
- #ä»åŸ
- #ããããã¢ããª
- #çºæ¿ä»å ¥
- #ä»å ¥
- #ãã©ãã£ãªãã£
- #åæ¥è«æ
- #ã¬ãŒã
- #ãã
- #ã¿ããã®æ ¡å
- #å€åœçºæ¿ä»å ¥