Quantitative Methods  Time Value Of Money Calculations
Here we will discuss the effective annual rate, time value of money problems, PV of a perpetuity, an ordinary annuity, annuity due, a single cash flow and a series of uneven cash flows. For each, you should know how to both interpret the problem and solve the problems on your approved calculator. These concepts will cover LOS' 5.b and 5.c.
The Effective Annual Rate
CFA Institute's LOS 5.b is explained within this section. We'll start by defining the terms, and then presenting the formula.
The stated annual rate, or quoted rate, is the interest rate on an investment if an institution were to pay interest only once a year. In practice, institutions compound interest more frequently, either quarterly, monthly, daily and even continuously. However, stating a rate for those small periods would involve quoting in small fractions and wouldn't be meaningful or allow easy comparisons to other investment vehicles; as a result, there is a need for a standard convention for quoting rates on an annual basis.
The effective annual yield represents the actual rate of return, reflecting all of the compounding periods during the year. The effective annual yield (or EAR) can be computed given the stated rate and the frequency of compounding. We'll discuss how to make this computation next.
Formula 2.1 Effective annual rate (EAR) = (1 + Periodic interest rate)^{m}  1 Where: m = number of compounding periods in one year, and periodic interest rate = (stated interest rate) / m 
Example: Effective Annual Rate
Suppose we are given a stated interest rate of 9%, compounded monthly, here is what we get for EAR:EAR = (1 + (0.09/12))^{12}  1 = (1.0075)^{ 12 } 1 = (1.093807)  1 = 0.093807 or 9.38%
Keep in mind that the effective annual rate will always be higher than the stated rate if there is more than one compounding period (m > 1 in our formula), and the more frequent the compounding, the higher the EAR.
Solving Time Value of Money Problems
Approach these problems by first converting both the rate r and the time period N to the same units as the compounding frequency. In other words, if the problem specifies quarterly compounding (i.e. four compounding periods in a year), with time given in years and interest rate is an annual figure, start by dividing the rate by 4, and multiplying the time N by 4. Then, use the resulting r and N in the standard PV and FV formulas.
Example: Compounding Periods
Assume that the future value of $10,000 five years from now is at 8%, but assuming quarterly compounding, we have quarterly r = 8%/4 = 0.02, and periods N = 4*5 = 20 quarters.
FV = PV * (1 + r)^{N }= ($10,000)*(1.02)^{20 }= ($10,000)*(1.485947) = $14,859.47
Assuming monthly compounding, where r = 8%/12 = 0.0066667, and N = 12*5 = 60.
FV = PV * (1 + r)^{N }= ($10,000)*(1.0066667)^{60 }= ($10,000)*(1.489846) = $14,898.46
Compare these results to the figure we calculated earlier with annual compounding ($14,693.28) to see the benefits of additional compounding periods.
Exam Tips and Tricks On PV and FV problems, switching the time units  either by calling for quarterly or monthly compounding or by expressing time in months and the interest rate in years  is an oftenused tactic to trip up test takers who are trying to go too fast. Remember to make sure the units agree for r and N, and are consistent with the frequency of compounding, prior to solving. 
Present Value of a Perpetuity
A perpetuity starts as an ordinary annuity (first cash flow is one period from today) but has no end and continues indefinitely with level, sequential payments. Perpetuities are more a product of the CFA world than the real world  what entity would obligate itself making to payments that will never end? However, some securities (such as preferred stocks) do come close to satisfying the assumptions of a perpetuity, and the formula for PV of a perpetuity is used as a starting point to value these types of securities.
The formula for the PV of a perpetuity is derived from the PV of an ordinary annuity, which at N = infinity, and assuming interest rates are positive, simplifies to:
Formula 2.2 PV of a perpetuity = annuity payment A interest rate r 
Therefore, a perpetuity paying $1,000 annually at an interest rate of 8% would be worth:
PV = A/r = ($1000)/0.08 = $12,500
FV and PV of a SINGLE SUM OF MONEY
If we assume an annual compounding of interest, these problems can be solved with the following formulas:
Formula 2.3 (1) FV = PV * (1 + r)^{N} (2) PV = FV * { 1 } (1 + r)^{N} Where: FV = future value of a single sum of money, 
Example: Present Value
At an interest rate of 8%, we calculate that $10,000 five years from now will be:FV = PV * (1 + r)^{N }= ($10,000)*(1.08)^{5 }= ($10,000)*(1.469328)
FV = $14,693.28
At an interest rate of 8%, we calculate today's value that will grow to $10,000 in five years:
PV = FV * (1/(1 + r)^{N}) = ($10,000)*(1/(1.08)^{5}) = ($10,000)*(1/(1.469328))
PV = ($10,000)*(0.680583) = $6805.83
Example: Future Value
An investor wants to have $1 million when she retires in 20 years. If she can earn a 10% annual return, compounded annually, on her investments, the lumpsum amount she would need to invest today to reach her goal is closest to:A. $100,000
B. $117,459
C. $148,644
D. $161,506Answer:
The problem asks for a value today (PV). It provides the future sum of money (FV) = $1,000,000; an interest rate (r) = 10% or 0.1; yearly time periods (N) = 20, and it indicates annual compounding. Using the PV formula listed above, we get the following:PV = FV *[1/(1 + r)^{ N}] = [($1,000,000)* (1/(1.10)^{20})] = $1,000,000 * (1/6.7275) = $1,000,000*0.148644 = $148,644
Using a calculator with financial functions can save time when solving PV and FV problems. At the same time, the CFA exam is written so that financial calculators aren't required. Typical PV and FV problems will test the ability to recognize and apply concepts and avoid tricks, not the ability to use a financial calculator. The experience gained by working through more examples and problems increase your efficiency much more than a calculator.
FV and PV of an Ordinary Annuity and an Annuity Due
To solve annuity problems, you must know the formulas for the future value annuity factor and the present value annuity factor.
Formula 2.4 Future Value Annuity Factor = ((1 + r)^{n}  1)/r 
Formula 2.5 Where r = interest rate and N = number of payments 
FV Annuity Factor
The FV annuity factor formula gives the future total dollar amount of a series of $1 payments, but in problems there will likely be a periodic cash flow amount given (sometimes called the annuity amount and denoted by A). Simply multiply A by the FV annuity factor to find the future value of the annuity. Likewise for PV of an annuity: the formula listed above shows today's value of a series of $1 payments to be received in the future. To calculate the PV of an annuity, multiply the annuity amount A by the present value annuity factor.
The FV and PV annuity factor formulas work with an ordinary annuity, one that assumes the first cash flow is one period from now, or t = 1 if drawing a timeline. The annuity due is distinguished by a first cash flow starting immediately, or t = 0 on a timeline. Since the annuity due is basically an ordinary annuity plus a lump sum (today's cash flow), and since it can be fit to the definition of an ordinary annuity starting one year ago, we can use the ordinary annuity formulas as long as we keep track of the timing of cash flows. The guiding principle: make sure, before using the formula, that the annuity fits the definition of an ordinary annuity with the first cash flow one period away.
Example: FV and PV of ordinary annuity and annuity due
An individual deposits $10,000 at the beginning of each of the next 10 years, starting today, into an account paying 9% interest compounded annually. The amount of money in the account of the end of 10 years will be closest to:A. $109,000
B. $143.200
C. $151,900
D. $165,600Answer:
The problem gives the annuity amount A = $10,000, the interest rate r = 0.09, and time periods N = 10. Time units are all annual (compounded annually) so there is no need to convert the units on either r or N. However, the starting today introduces a wrinkle. The annuity being described is an annuity due, not an ordinary annuity, so to use the FV annuity factor, we will need to change our perspective to fit the definition of an ordinary annuity.
Drawing a timeline should help visualize what needs to be done:
Figure 2.1: Cashflow Timeline 
The definition of an ordinary annuity is a cash flow stream beginning in one period, so the annuity being described in the problem is an ordinary annuity starting last year, with 10 cash flows from t_{0 }to t_{9}. Using the FV annuity factor formula, we have the following:
FV annuity factor = ((1 + r)^{N}  1)/r = (1.09)^{10}  1)/0.09 = (1.3673636)/0.09 = 15.19293
Multiplying this amount by the annuity amount of $10,000, we have the future value at time period 9. FV = ($10,000)*(15.19293) = $151,929. To finish the problem, we need the value at t_{10}. To calculate, we use the future value of a lump sum, FV = PV*(1 + r)^{N}, with N = 1, PV = the annuity value after 9 periods, r = 9.
FV = PV*(1 + r)^{N} = ($151,929)*(1.09) = $165,603.
The correct answer is "D".
Notice that choice "C" in the problem ($151,900) agrees with the preliminary result of the value of the annuity at t = 9. It's also the result if we were to forget the distinction between ordinary annuity and annuity due, and go forth and solve the problem with the ordinary annuity formula and the given parameters. On the CFA exam, problems like this one will get plenty of takers for choice "C"  mostly the people trying to go too fast!!
PV and FV of Uneven Cash Flows
The FV and PV annuity formulas assume level and sequential cash flows, but if a problem breaks this assumption, the annuity formulas no longer apply. To solve problems with uneven cash flows, each cash flow must be discounted back to the present (for PV problems) or compounded to a future date (for FV problems); then the sum of the present (or future) values of all cash flows is taken. In practice, particularly if there are many cash flows, this exercise is usually completed by using a spreadsheet. On the CFA exam, the ability to handle this concept may be tested with just a few future cash flows, given the time constraints.
It helps to set up this problem as if it were on a spreadsheet, to keep track of the cash flows and to make sure that the proper inputs are used to either discount or compound each cash flow. For example, assume that we are to receive a sequence of uneven cash flows from an annuity and we're asked for the present value of the annuity at a discount rate of 8%. Scratch out a table similar to the one below, with periods in the first column, cash flows in the second, formulas in the third column and computations in the fourth.
Time Period  Cash Flow  Present Value Formula  Result of Computation 
1  $1,000  ($1,000)/(1.08)^{1}  $925.93 
2  $1,500  ($1,500)/(1.08)^{2}  $1,286.01 
3  $2,000  ($2,000)/(1.08)^{3}  $1,587.66 
4  $500  ($500)/(1.08)^{4}  $367.51 
5  $3,000  ($3,000)/(1.08)^{5}  $2,041.75 
Taking the sum of the results in column 4, we have a PV = $6,208.86.
Suppose we are required to find the future value of this same sequence of cash flows after period 5. Here's the same approach using a table with future value formulas rather than present value, as in the table above:
Time Period  Cash Flow  Future Value Formula  Result of computation 
1  $1,000  ($1,000)*(1.08)^{4}  $1,360.49 
2  $1,500  ($1,500)*(1.08)^{3}  $1,889.57 
3  $2,000  ($2,000)*(1.08)^{2}  $2,332.80 
4  $500  ($500)*(1.08)^{1}  $540.00 
5  $3,000  ($3,000)*(1.08)^{0}  $3,000.00 
Taking the sum of the results in column 4, we have FV (period 5) = $9,122.86.
Check the present value of $9,122.86, discounted at the 8% rate for five years:
PV = ($9,122.86)/(1.08)^{5} = $6,208.86. In other words, the principle of equivalence applies even in examples where the cash flows are unequal.
Time Value Of Money Applications
Financial Advisors
Tips on Passing the CFA Level I on Your First Attempt
Obtain valuable tips and helpful study instructions that can help you pass the Level 1 Chartered Financial Analyst exam on your first attempt. 
Financial Advisors
Putting Your CFA Level I on Your Resume
Learn techniques for emphasizing your CFA Level I status in the Skills and Certifications or Professional Development section of your resume. 
Professionals
Investment Analyst: Career Path and Qualifications
Learn how to prepare for a career as an investment analyst, and read more about how many professionals in the field progress during their careers. 
Professionals
CAIA Vs. CFA: How Are They Different?
Find out how the CAIA and CFA designations differ, including which professionals should seek either title based on their career ambitions. 
Professionals
Equity Investments: CFA Level II Tutorial
Chapter 1: Equity Valuation: Its Applications and Processes Chapter 2: Return Concepts for Equity Valuation Chapter 3: Industry Analysis With Porter's 5 Forces 
Professionals
What To Expect On The CFA Level III Exam
The Chartered Financial Analyst Level III exam, which is only offered in June, is the last in the series of three tests that CFA candidates must pass. 
Professionals
What To Expect On The CFA Level I Exam
Becoming a chartered financial analyst requires the passing of three grueling exams covering an array of topics. 
Options & Futures
The Alphabet Soup of Financial Certifications
We decode the meaning of the many letters that can follow the names of financial professionals. 
Professionals
How to Ace the CFA Level I Exam
Prepare to ace the CFA Level 1 exam by studying systematically. 
Personal Finance
How To Choose A Financial Advisor
Many advisors display similar skillsets that can make distinguishing between them difficult. The following guidelines can help you better understand their qualifications and services.

Personal Financial Advisor
Professionals who help individuals manage their finances by providing ... 
CFA Institute
Formerly known as the Association for Investment Management and ... 
Security Analyst
A financial professional who studies various industries and companies, ... 
Chartered Financial Analyst  CFA
A professional designation given by the CFA Institute (formerly ...

What are the differences between a Chartered Financial Analyst (CFA) and a Certified ...
The differences between a Chartered Financial Analyst (CFA) and a Certified Financial Planner (CFP) are many, but comes down ... Read Full Answer >> 
How do I become a Chartered Financial Analyst (CFA)?
According to the CFA Institute, a person who holds a CFA charter is not a chartered financial analyst. The CFA Institute ... Read Full Answer >> 
What types of positions might a Chartered Financial Analyst (CFA) hold?
The types of positions that a Chartered Financial Analyst (CFA) is likely to hold include any position that deals with large ... Read Full Answer >> 
Who benefits the most from prepaid expenses?
Prepaid expenses benefit both businesses and individuals. Prepaid expenses are the types of expenses that are bought or paid ... Read Full Answer >> 
If I am looking to get an Investment Banking job. What education do employers prefer? ...
If you are looking specifically for an investment banking position, an MBA may be marginally preferable over the CFA. The ... Read Full Answer >> 
Can I still pass the CFA Level I if I do poorly in the ethics section?
You may still pass the Chartered Financial Analysis (CFA) Level I even if you fare poorly in the ethics section, but don't ... Read Full Answer >>