[PDF] [PDF] THE TIME VALUE OF MONEY - NYU Stern

Other things remaining equal, the value of cash flows in future _me periods will decrease as lecture notes for the present value of an annuity will be PV(A,r,n)



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THETIMEVALUEOFMONEY

AswathDamodaran

2

Intui ¨ Therearethreereasonswhyadollartomorrowisworthlessthanadollartoday future,thelessthatcashflowwillbevalued. ¨ Otherthingsremainingequal,thevalueofcashflowsinfuture Discoun

¨ Themechanismforfactoringintheseelementsisthediscountrate.Thediscountrateisarateatwhichpresentandfuturecashflowsaretradedoff.Itincorporates

¨ Ahigherdiscountratewillleadtoalowervalueforcashflowsin thefuture. ¨ Thediscountrateisalsoanopportunitycost,sinceitcapturesthe • DiscounPresentValuePrinciple1

¨ Cashflowsatdi fferentpointsin ¨ Allcashflowshavetobebroughttothesamepoint in¨ Thatpointof pointinTimelinesforcashflows ¨ Thebestwaytovisualizecashflowsisona¨ Ina yearisshownasaperiod. 0123
4 $ 100$ 100$ 100$ 100 Figure 3.1: A Time Line for Cash Flows: $ 100 in Cash Flows Received at the End of Each of Next 4 years

Cash Flows

Year 6

CashFlowTypesandDiscoun

¨ Therearefivetypesofcashflows-

• simplecashflows,• annui • MostassetsrepresentcombinaI.SimpleCashFlows

¨ AsimplecashflowisasinglecashflowinaspecifiedfutureCashFlow:CF t TimePeriod:t¨ ThepresentvalueofthiscashflowisPVofSimpleCashFlow=CF t /(1+r) t ¨ ThefuturevalueofacashflowisFVofSimpleCashFlow=CF 0 (1+r) t 8

¨ Between1926and2013, stocksontheave ragemadeabout9.55%ayear,whilegovernmentbondsonaverage madeabout4.93%aye arandT.Bills earned3.53%ayear.

¨ Ifyourholdingperiodisoneyear,thedifferencein

end-of-periodvaluesissmall: 9

HoldingPeriodandValue

10

ConceptCheck

¨ Mostpensionplansallowindividualstodecidewheretheirpensionsfundswillbeinvested-stocks,bondsormoneymarketaccounts.

¨ Wherewouldyouchoosetoinvestyourpensionfunds?

a. Predominantlyorallequityb. Predominantlyorallbondsandmoneymarketaccountsc. AMixofBondsandStocks

¨ Willyouralloca a. Yesb. No 11

TheFrequencyofCompounding

¨ Thefrequencyofcompoundingaffectsthefutureandpresentvaluesofcashflows.Thestatedinterestratecandeviatesignificantlyfromthetrueinterestrate-

compounding,worksoutto-

Effec 2 2 -110.25%Monthly10%12(1+r/12) 12 -110.47%Daily10%365(1+r/365) 365
-110.5156%ConII.Annui

¨ Anannuityisaconstantcashflowthatoccursatregularintervalsforafixedperiodof AAAA ||||01234 13

PresentValueofanAnnuity

¨ Thepresentvalueofanannuitycanbecalculatedbytakingeachcashflowanddiscoun

PV of an Annuity = PV(A,r,n) = A

1 - 1 (1+r) n r 14

Example:PVofanAnnuity

¨ Thepresentvalueofanannuityof$1,000attheendofeachyearforthenextfiveyears,assumingadiscountrateof10%is-

¨ Thenota

PV of $1000 each year for next 5 years = $1000

1 - 1 (1.10) 5 .10 = $3,791 15

Annuity,givenPresentValue

¨ Thereverseofthisproblem,iswhenthepresentvalueisknownandtheannuityistobees¨ This,forinstance,istheequa

Annuity given Present Value = A(PV,r,n) = PV

r 1 - 1 (1+r) n 16

Compu

¨ Supposeyouborrow$200,000tobuyahouseona30-yearmortgagewithmo nthlypayments.Theannualpercentage rateontheloanis8%.Themonthlypaymentsonthisloan,withthepaymentsoccurringattheendofe achmont h,canbecalculatedusingthisequa

Monthly Payment on Mortgage = $200,000

0.0067

1 - 1 (1.0067) 360
=$1473.11 17

FutureValueofanAnnuity

¨ Thefuturevalueofanend-of-the-periodannuitycanalsobecalculatedasfollows-

¨ Thisistheequa

FV of an Annuity = FV(A,r,n) = A

(1+r) n - 1 r 18

AnExample

¨ Thus,thefuturevalueof$1,000attheendofeachyearforthenextfiveyears,attheendofthefishyearis(assuminga10%discountrate)-

¨ Thenota anannuitywillbeFV(A,r,n).

FV of $1,000 each year for next 5 years = $1000

(1.10) 5 - 1 .10 = $6,105 19

Annuity,givenFutureValue

¨ ifyouaregiventhefuturevalueandyouarelookingforanannuity-A(FV,r,n)intermsofnotaAnnuity given Future Value = A(FV,r,n) = FV

r (1+r) n - 1 20

Applica

¨ Assumethatyouwanttosendyournewbornchildtoaprivatecollege(whenhegetstobe18yearsold).Thetui 18 years)=$127,537 ¨ Ifyouneedtosetasidealumpsumnow,theamountyouwould needtosetasidewouldbe- 18 =$31,916 ¨ Ifsetasideasanannuityeachyear,star

Applica

¨ Assumethatyouwereearning$40,000/yearbeforeenteringprogramandthattui ¨ Assumethatyouwillwork30yearsasergradua

¨ Assumethatyouhaveathirty-yearmortgagefor$200,000thatcarriesaninterestrateof9.00%.Themortgagewastakenthreeyearsago.Sincethen,assumethatinterestrateshavecomedownto7.50%,andthatyouarethinkingofrefinancing.Thecostofrefinancingisexpectedtobe2.50%oftheloan.(Thiscostincludesthepointsontheloan.)Assumealsothatyoucaninvestyourfundsat6%.

¨ MonthlySavingsfromrefinancing=$1,609-$1,398=$211 23

Refinancing:TheTradeOff

¨ Ifyouplantoremaininthishouseindefinitely,

27
=$9,532

¨ RefinancingCost=2.5%of$200,000=$5,000¨ TotalRefinancingCost=$9,532+$5,000=$14,532¨ NetEffect=$33,815-$14,532=$19,283:Refinance

24

Follow-upQues impactyourdecision? 25

ValuingaStraightBond

¨ Youaretryingtovalueastraightbondwithafiseenyearmaturityanda10.75%couponrate.Thecurrentinterestrateonbondsofthisrisklevelis8.5%.

15

1186.85

¨ Ifinterestratesriseto10%,

15 $1,057.05

Percentagechangeinprice=-10.94%

¨ Ifinterestratefallto7%,

15 $1,341.55

Percentagechangeinprice=+13.03%

¨ Thisasymmetricresponsetointerestratechangesiscalled convexity. 26

BondPricingProposi ¨ Thelongerthematurityofabond,themoresensiPrice Changes as a function of Bond Maturities

Bond Maturity

% Change in Price -15.00% -10.00% -5.00% 0.00% 5.00%

10.00%

15.00%

20.00%

151530

% Change if rate drops to 7% % Change if rate increases to 10% 27

BondPricingProposi ¨ Thelowerthecouponrateonthebond,themoresensiBond Price Changes as a function of Coupon Rates

Coupon Rate

% Price Change -20.00% -15.00% -10.00% -5.00% 0.00% 5.00%

10.00%

15.00%

20.00%

25.00%

0%5%10.75%12%

% Change if rate drops to 7% % Change if rate increases to 10% 28

III.GrowingAnnuity

¨ Agrowingannuityisacashflowgrowingataconstantrateforaspecifiedperiodof 0123

A(1+g)

2

Figure 3.8: A Growing Annuity

A(1+g)

3

A(1+g)

nA(1+g) n 29

PresentValueofaGrowingAnnuity

• Thepresentvalueofagrowingannuitycanbees • Inthatspecificcase,thepresentvalueisequaltothe

PV of an Annuity = PV(A,r,g,n) = A(1+g)

1 - (1+g) n (1+r) n (r-g) 30

TheValueofaGoldMine

¨ Considertheexampleofagoldmine,whereyouhavetherightstothemineforthenext20years,overwhichperiodyouplantoextract5,000ouncesofgoldeveryyear.Thepriceperounceis$300currently,butitisexpectedtoincrease3%ayear.Theappropriatediscountrateis10%.Thepresentvalueofthegoldthatwillbeextractedfromthisminecanbees

PV of extracted gold = $300*5000*(1.03)

1 - (1.03) 20 (1.10) 20 .10-.03 =$16,145,980 31
Present Value of Extracted Gold as a function of Growth Rate $5,000,000 $10,000,000 $15,000,000 $20,000,000 $25,000,000 $30,000,000 $35,000,000 $40,000,000 $45,000,000 $50,000,000

0%1%2%3%4%5%6%7%8%9%

10%11%12%13%14%15%

Growth Rate in Gold Prices

Present Value of Extracted Gold

32

IV.Perpetuity

¨ Aperpetuityisaconstantcashflowatregularintervalsforever.Thepresentvalueofaperpetuityis-

¨ Forevermaybeatoughconceptforhumanbeings

PV of Perpetuity =

A r 33

ValuingaConsoleBond

¨ Aconsolebondisabondthathasnomaturityandpaysafixedcoupon.Assumethatyouhavea6%couponconsolebond.Thevalueofthisbond,iftheinterestrateis9%,isasfollows-

ValueofConsoleBond=$60/.09=$667

34

V.GrowingPerpetui

¨ Agrowingperpetuityisacashflowthatisexpectedtogrowataconstantrateforever.Thepresentvalueofagrowingperpetuityis-

where 1

PV of Growing Perpetuity =

CF 1 (r-g) 35

ValuingaStockwithGrowingDividends

¨ IntwelvemonthsleadingintoJanuary2014,ConEdpaiddividendspershareof$2.52.

¨ Itsearningsanddividendshadgrownat2%ayear

¨ Therateofreturnrequiredbyinvestorsonstocksof

equivalentriskwas7.50%.

¨ Withtheseinputs,wecanvaluethestockusinga

perpetualgrowthmodel: 36

ValueandGrowth!

quotesdbs_dbs14.pdfusesText_20