Chapter 3 answersWord格式.docx
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Chapter 3 answersWord格式.docx
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1.Adebtobligationoffersthefollowingpayments:
YearsfromNow
CashFlowtoInvestor
1
$2,000
2
3
$2,500
4
$4,000
Supposethatthepriceofthisdebtobligationis$7,704.Whatistheyieldorinternalrateofreturnofferedbythisdebtobligation?
Theyieldonanyinvestmentistheinterestratethatwillmakethepresentvalueofthecashflowsfromtheinvestmentequaltotheprice(orcost)oftheinvestment.
Mathematically,theyieldonanyinvestment,y,istheinterestratethatsatisfiestheequation:
P=
whereCFt=cashflowinyeart,P=priceoftheinvestment,andN=numberofyears.Theyieldcalculatedfromthisrelationshipisalsocalledtheinternalrateofreturn.Tosolvefortheyield(y),wecanuseatrial-and-error(iterative)procedure.Theobjectiveistofindtheinterestratethatwillmakethepresentvalueofthecashflowsequaltotheprice.Tocomputetheyieldforourproblem,differentinterestratesmustbetrieduntilthepresentvalueofthecashflowsisequalto$7,704(thepriceofthefinancialinstrument).Tryinganannualinterestrateof10%givesthefollowingpresentvalue:
PromisedAnnualPayments
(CashFlowtoInvestor)
PresentValue
ofCashFlowat10%
$1,818.18
$1,652.89
$1,878.29
$2,732.05
Presentvalue=$8,081.41
Becausethepresentvalueof$8,081.41computedusinga10%interestrateexceedsthepriceof$7,704,ahigherinterestratemustbeused,toreducethepresentvalue.Tryinganannualinterestrateof13%givesthefollowingpresentvalue:
ofCashFlowat13%
$1,769.91
$1,566.29
$1,732.63
$2,453.27
Presentvalue=$7,522.10
Becausethepresentvalueof$7,522.10computedusinga13%interestrateisbelowthepriceof$7,704,alowerinterestratemustbeused,toreducethepresentvalue.Thus,toincreasethepresentvalue,alowerinterestratemustbetried.Tryinganannualinterestrateof12%givesthefollowingpresentvalue:
ofCashFlowat12%
$1,785.71
$1,594.39
$1,779.45
$2,542.07
Presentvalue=$7,701.62
Using12%,thepresentvalueofthecashflowis$7,701.62,whichisalmostequaltothepriceofthefinancialinstrumentof$7,704.Therefore,theyieldiscloseto12%.ThepreciseyieldusingExcelorafinancialcalculatoris11.987%.
Althoughtheformulafortheyieldisbasedonannualcashflows,itcanbegeneralizedtoanynumberofperiodicpaymentsinayear.Thegeneralizedformulafordeterminingtheyieldis
whereCFt=cashflowinperiodt,andn=numberofperiods.
Keepinmindthattheyieldcomputedistheyieldfortheperiod.Thatis,ifthecashflowsaresemiannual,theyieldisasemiannualyield.Ifthecashflowsaremonthly,theyieldisamonthlyyield.Tocomputethesimpleannualinterestrate,theyieldfortheperiodismultipliedbythenumberofperiodsintheyear.
2.Whatistheeffectiveannualyieldifthesemiannualperiodicinterestrateis4.3%?
Toobtainaneffectiveannualyieldassociatedwithaperiodicinterestrate,thefollowingformulaisused:
effectiveannualyield=(1+periodicinterestrate)m–1
wheremisthefrequencyofpaymentsperyear.Inourproblem,theperiodicinterestrateisasemiannualrateof4.3%andthefrequencyofpaymentsistwiceperyear.Insertingthesenumbers,wehave:
effectiveannualyield=(1.043)2–1=1.087849–1=0.087849orabout8.785%.
3.Whatistheyieldtomaturityofabond?
Theyieldtomaturityistheinterestratethatwillmakethepresentvalueofthecashflowsequaltotheprice(orinitialinvestment).Forasemiannualpaybond,theyieldtomaturityisfoundbyfirstcomputingtheperiodicinterestrate,y,whichsatisfiestherelationship:
whereP=priceofthebond,C=semiannualcouponinterest(indollars),M=maturityvalue(indollars),andn=numberofperiods(numberofyearstimes2).
Itismucheasiertocomputetheyieldtomaturityforazero-couponbondbecausewecanuse:
.
Theyield-to-maturitycalculationtakesintoaccountnotonlythecurrentcouponincomebutalsoanycapitalgainorlossthattheinvestorwillrealizebyholdingthebondtomaturity.Inaddition,theyieldtomaturityconsidersthetimingofthecashflows.
4.Whatistheyieldtomaturitycalculatedonabond-equivalentbasis?
Forasemiannualpaybond,doublingtheperiodicinterestrateordiscountrate(y)givestheyieldtomaturity,whichunderstatestheeffectiveannualyield.The
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