投资学第10版习题05.docVIP

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投资学第10版习题05 投资学第10版习题05 投资学第10版习题05 Chapter5-Risk,Return,andtheHistoricalRecord CHAPTER5:RISK,RETURN,ANDTHEHISTORICALRECORD PROBLEMSETS TheFisherequationpredictsthatthenominalratewillequaltheequilibriumrealrateplustheexpectedinflationrate.Hence,iftheinflationrateincreasesfrom3%to5%whilethereisnochangeintherealrate,thenthenominalratewillincreaseby2%.Ontheotherhand,itispossiblethatanincreaseintheexpectedinflationratewouldbeaccompaniedbyachangeintherealrateofinterest.Whileitisconceivablethatthenominalinterestratecouldremainconstantastheinflationrateincreased,implyingthattherealratedecreasedasinflationincreased,thisisnotalikelyscenario. Ifweassumethatthedistributionofreturnsremainsreasonablystableovertheentirehistory,thenalongersampleperiod(i.e.,alargersample)increasestheprecisionoftheestimateoftheexpectedrateofreturn;thisisaconsequenceofthefactthatthestandarderrordecreasesasthesamplesizeincreases.However,ifweassumethatthemeanofthedistributionofreturnsischangingovertimebutwearenotinapositiontodeterminethenatureofthischange,thentheexpectedreturnmustbeestimatedfromamorerecentpartofthehistoricalperiod.Inthisscenario,wemustdeterminehowfarback,historically,togoinselectingtherelevantsample.Here,itislikelytobedisadvantageoustousetheentiredatasetbackto1880. Thetruestatementsare(c)and(e).Theexplanationsfollow. Statement(c):Let=theannualstandarddeviationoftheriskyinvestmentsand1=thestandarddeviationofthefirstinvestmentalternativeoverthetwo-yearperiod.Then: 2 Therefore,theannualizedstandarddeviationforthefirstinvestmentalternativeisequalto: 1 22 5-1 Copyright?2014McGraw-HillEducation.Allrightsreserved.Noreproductionordistributionwithoutthepriorwritten consentofMcGraw-HillEducation. Chapter5-Risk,Return,andtheHistoricalRecord Statement(e):Thefirstinvestmentalternativeismoreattractivetoinvestorswithlowerdegreesofriskaversion.Thefirstalternative(entailingasequenceoftwoidenticallydistributedanduncorrelatedriskyinvestments)isriskierthanthesecondalternative(theriskyinvestmentfollowedbya

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