Rate of Return
Debt Instruments and Markets
Professor Carpenter
Rate of Return
Reading: Veronesi, Chapter 7
Investment over a Holding Period
Rate of Return
?
Consider an investment in any asset over a holding
period from time 0 to time T.
?
Suppose the amount invested at time 0 is P and the
payoff at time T is F.
?
F might not be known at time 0. In general, the
payoff F is not known until the investment horizon
date T.
Invest P
Get Payoff F
Time 0
Time T
1
Debt Instruments and Markets
Professor Carpenter
Rate of Return over a Holding Period
?
To compare the performance of different investments,
and adjust for scale, one might consider the gross or
unannualized rate of return (ROR) on the investment:
?
?
Unannualized ROR = F/P - 1.
To adjust for differences in the length of the holding
period as well, one might annualize the ROR. We'll use
semi-annual compounding to be consistent with US bond
market interest rate quote conventions.
?
The annualized ROR with semi-annual compounding is
R = 2[(F/P)(1/(2T))-1]
so that F/P=(1+R/2)2T
Example of Holding Period Return
Rate of Return
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Suppose you invest $100 in an asset at time 0 and at
time 5 it is worth $150.
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Your un-annualized ROR is 150/100-1=50%.
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Class Problem: What is your annualized ROR with semiannual compounding?
2
Debt Instruments and Markets
Professor Carpenter
Rate of Return on a Zero:
Case 1) Maturity Equal to Investment Horizon
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If you buy a zero-coupon bond and hold it to
maturity, the ROR on your investment is the zero
rate at which you bought the bond:
T = t, P = dt, F = 1 so
R = 2[(1/dt)(1/(2t))-1]=rt
?
Example: If you buy a 1-year zero at 5.25% and
hold it to maturity your ROR over 1-year is
1
R = 2[(
)1/ 2 ?1] = 5.25%
2
1/(1+ 0.0525 /2)
€
Rate of Return on a Zero:
Case 2) Maturity Longer than Investment Horizon
Rate of Return
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If you buy a t-year zero-coupon bond and sell it at time
T ................
................
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