applied volatility and correlation modelling using excel

applied volatility and correlation modelling using excel

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页数:20页

时间:2018-02-10

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1、10AppliedVolatilityandCorrelationModellingUsingExcel∗FRED´ERICKBOURGOIN´ABSTRACTThischapterimplementsarangeofunivariateandmultivariatemodelswithinMicrosoftExcel.Thisisextremelyusefulasalargeproportionoffinanceprofessionals,studentsandresearchersthatarefamiliarwiththispackage.Weshowhowtoge

2、nerateone-stepaheadforecastsofvolatilityusingtheJPMorganRiskMetricsmodel,JPMorganRiskMetricsmodelwithanoptimaldecay,aGARCHmodelwithandwithoutavariancereductiontechniqueandfinallyusingtheGJRmodeltoaccountforasymmetricreactiontonews.Acomparisonofforecastsismadeandsomeusefulinsightstotheeffic

3、iencyofthemodelsishighlighted.Inthesecondpartofthischapter,wemodelthetime-varyingcorrelationusingdifferentmodels.AswiththeunivariateapproachthisincludestheJPMorganRiskMetricsmodelwithandwithoutoptimaldecay,aGARCHmodelwithandwithoutvariancereductionandfinallytheso-called“FastGARCH”modelofw

4、hichtheauthorhaspreviouslymadesignificantcontributionstotheliterature.10.1INTRODUCTIONThepracticabilityofmultivariateGARCHmodelshasbeenthesubjectofseveralarticlesinthepastfewyears,particularlyregardingthefeasibilityoflargesizeproblems(Athayde,2001;Bourgoin,2000,2002;EngleandMezrich,1995,1

5、996;DingandEngle,1994;Ledoit,2001;Ledoitetal.,2001).Somemodelsworkwellonlyonspecificdata,liketheorthogonalGARCH(AlexanderandChibumba,1997)withyieldcurveortermstructureofimpliedvolatilities(seeBourgoin(2000)forthereasons).Becauseallthesemodelsrequirecomplexoptimisationroutinesandtricks,GAR

6、CHmodelshavealwaysrequiredspecialsoftwarelikeRats(RegressionAnalysisofTimeSeries),Eviews,Matlab,S-Plus,Gauss,OxorevenspecialC++code.Inthischapter,wewilltrytoprovideanunderstandablewaytoconstructGARCHmodels,bothunivariateandmultivariatemodels,usingExcel,themostwidelyusedfinancialapplicatio

7、ninthemarketplace.TwoExcelspreadsheetsareprovidedontheCD-Rom,onefortheunivariatemodelsandanotheroneforthemultivariatemodels(Bourgoin001.xls,andBourgoin002.xls,respectively).∗TheviewsexpressedhereinarethoseoftheauthoranddonotnecessarilyreflecttheviewsofBarclaysGlobalInvesto

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