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Risk
the probability that actual future returns will deviate from expected returns; represents the variability of returns, so ___ implies a chance for some unfavorable event to occur
With a finance perspective, risk could then be any of the following examples:
sales, labor cost, material cost, inventory, exchange rates; impacts net income and dividends
Historical Risk and Return
what has our investment done historically... we know what the prices and dividends were
Average Return
(performance) average % return on investment over a sample time period
Variance
(votality) How far do returns fall from the mean or average
The greater the variance,
then the greater the volatility or risk of the investment
Return
the interest or % that we earn over a time period (typically a year or month)
Average of Return
the total % gain or loss divided by the number of returns
Holding Period Return (HP)
compounded return over life of investment
Random Variable
is some measurement that can have a number of possible future outcomes (it varies)
Example: Business {Sales, expenses , etc.} ; returns are random variables
Probability Distribution
is a function that assigns probabilities to the various possible outcomes that a random variable can have
there are two forms: discrete and continuous
For either the continuous or discrete probability function, the probabilities must add to 1
Discrete Probability Distribution
the outcomes can only take on a finite number of values
Continuous Probability Distribution
the outcomes can take on infinitely many values over a continuous range of values
Expected Value
the measure of central tendency of the distribution (the average value); (similar to average)
Variance Expected Value
measures the spread of the distribution or the variation in possible outcomes about the expected value
The normal distribution
is often used with financial variables such as returns or cash flows. The ____ is symmetric around a mean. _______ calculates a z-score or z-stat that measures how many standard deviations a specific value falls from the mean.
The normal curve
creates confidence intervals for where a random observation will fall. Standard deviation drives the _____ distribution.
Confidence Interval
chance that our outcome falls in a specific range
68% confidence interval = E(r) +/- std dev.
95% confidence interval = E(r) =/- 2 x std dev.
The return on a stock comes from two sources:
the gain in price (capital gain) and any dividends paid by the firm to the investor
The standard deviation is the variation in returns. It is also known as...
the stand-alone risk. ____ simply implies the risk associated with only investing in that stock
Std. Dev. = volatility = stand-alone risk
How can we compare two stocks?
It depends on the expected returns. If the two stocks have the same expected return, then we can look at the standard deviation and make a decision.
For most of us, we are risk
...averse. Standard deviation percentage higher same return for less risk
If the two stocks have different expected returns, we can use...
the coefficient of variation to determine which stock offers the most return per unit of risk
Coefficient of variation = std. dev./ E(r)
A portfolio...
is a collection of two or more assets. Allows you to lower your overall risk. "Don't put all your eggs in one basket"
A typical stock will have an expected return of _____ and a stand-alone risk of ___.
E(r) ; Std. Dev.
The correlation between two variables...
is a measure that indicates how much the two variables move or vary together
That is, both variables may vary and have outcomes different than their means, but when variable A has an outcome above its mean, will variable B tend to also have an outcome above its mean ... or below?
Correlation falls between...
-1 and 1
Positive Correlation
0< correlation (P) =<1
returns tend to move together
Negative Correlation
-1 =< correlation < 0
returns tend to be opposites
Zero Correlation
Correlation = no relationship
What does correlation capture?
It really identifies that stand-alone risk for a firm can be divided into components: market-wide risk and firm-specific risk
Market Wide Risk (Macroeconomic Risk)
There are economic events that have broad implications and cause all stocks to move up or down together.
Events such as economic recessions or booms, interest rate changes, taxes, political development, or oil prices will generally impact all firms and thus stock prices similarly
This is market risk also known as...
non-diversifiable risk. "A rising tide raises all boats"
these events tend to affect all stock returns in same Direction, BUT NOT THE SAME MAGNITUDE
Firm Specific Risk
systematic risk; non-diversifiable risk; there are economic and business events that impact only one or a few firms at a time
events unique to firm
product release, expansion, merger lawsuit, competition, CEO change
HIGH non diversifiable risk
HIGH return
The Market Portfolio...
is a portfolio that contains all assets in existence. Each asset is held in the same proportion as its value is to the total value in the economy
Risk of the market portfolio:
the stand-alone risk of the market portfolio is entirely nondiversifiable risk. It is entirely relevant risk
Investors have some _____ to hold the market portfolio. Using this return, we can determine the market risk premium.
expected return, E(r)
Market risk premium
the excess return required for the investor to buy the market portfolio
Market portfolio
reference point: risk of average investment; a benchmark that I will compare it to specific investment
A Stock's Relevant Risk
a stock's relevant or market risk equals its stand-alone times the correlation coefficient that exists between the stock's returns and the market portfolio
P(i,m)
correlation b/w returns on stock and the market portfolio
what % of time do stock "i" returns more with overall economy
% of a stock's volatility that can't be Diversified
A stock's Beta
we use beta to compare our stock vs. average investment
Beta
is a risk index. It is a ratio of a stock's relevant risk divided by the relevant risk of the market portfolio
=relevant risk of stock/risk of market portfolio
=Non-diversifiable risk of stock/risk of average investment
regression coefficient
how do market portfolio returns (x) explain the returns on my stocks (y)
slope: how does the market explain out stock
KEY POINT: Beta predicts...
the EXPECTED relationship between the market return and the return on the individual stock
Beta=1.50
riskier than average investment; if market is up 1%, stock is up by 1.5%; more volatile
Beta=0.75
safer than the average investment; if market is up by 1%, stock up 0.75%; smaller Beta smaller return
Beta=1.00
same risk as average investment; moves the same as market on average
The CAPM Formula
this relates a stock's market risk to its required return
r(i)
required return to invest today (based on risk)
r(f)
risk free return (guaranteed return; std. dev. = 0, Beta =0)
Beta
risk index (scales my required return); "multiplier"
Depends on BOTH correlation and std. dev.
E(rm)
expected return on market portfolio (average investment)
E(rm)-r(f)
market portfolio risk PREMIUM
Bonus return for average investment
How do we apply the CAPM formula?
r(f) = return or YTM on U.S. government debt (zero risk); 90 T-bill
E(rm)=return on market index (S&P 500 index return: 500 largest firms in our economy; fully diversified)
What weaknesses do you see in its calculations?
Beta= regression coefficient
x: returns on S&P 500
y: returns on individual stock
Historical spread b/w market returns and debt
Problem: using the past to predict the future
Security Market Line
graphical representation of CAPM
plot the required return as a function of Beta
Stock Valuation (One period model)
the investor plans to purchase a common stock and hold it for one period
P0
selling price today per share
P1
selling price per share in one year
D1
Dividend paid in exactly one year
r
Return on investment
Finite Holding Periods: Multiple Periods
investors will seek to estimate all the cash flows that the stock will generate
Once an investor has estimated all the cash flows, they can then discount or "capitalize" all the flows to arrive at their personal estimation of the present value of the stock OR their INTRINSIC VALUE for the stock
Weaknesses of Finite Model
1) Assume a future selling price **
2) Predicting future dividends is a challenge
Fundamental Analysis
the whole process of finding a stock's price. One has to examine ____ information on the firm's operations and management to make accurate estimations of the firm's earning and ultimately its dividends, future price, and r.
Infinite Holding Periods
stock is not sold in the future; assume that the stock is to be valued as a perpetual stream of dividends... no future selling price is to be considered in the pricing formula
Why is this reasonable?
Po=stock price=PV of all future dividends
and corporations have unlimited life
so the current price of a stock really just capitalizes all future dividend payments
How can we solve this equation?
We need to relate the dividends
Simpler solution is to assume that dividends grow at a constant annual rate
Gordon-Growth Model
Can we make the Infinite Model more realistic?
Pro: no assumed selling price
Cons: assuming constant growth forever, price is very sensitive to "g"
There are three basic types of stock market transactions:
1) Primary
2) Secondary
3) IPO: Initial Public Offering
Primary stock market transactions
when an existing public company issues new share for a project
Secondary stock market transactions
when investors trade shares of an existing public firms
IPO: Initial Public Offering
higher success in a Bull Market (everything sells for higher prices) ; market high, the amount of of IPO's increase
Two Phase Growth Model
Non-constant growth; while researching a firm, you may be able to arrive at a decent estimates of dividends for a few years in the future. After a certain point, your estimates may become quite uncertain. For this uncertain period, you may want to assume a constant growth rate in dividends
What are a few basic events that can affect a stock's price and how does this relate to our basic models?
1)Increase in Net Income for the firm
-income exceeds expectations (currently banks)
-↑income, ↑ dividends, ↑ stock price
2)Increase in Sales
-sales exceed expectations
↑ sales, ↑ N/I, ↑ Dividends, ↑stock price
3) Risk associated with a stock increases
-↑risk, ↑return, ↓stock price
-Ex: Verizon and Dunkin Donuts (wheat)
Stock Market Equilibrium
Required Return=CAPM=r
-Based on Risk
Expected Return=Actual Return
-Based on Price
Capital Budgeting
is the process of planning for purchases of assets whose returns are expected to continue beyond 1 year. Firms undertake ___capital budgeting decisions for the purchase of machinery, plant construction or expansion, new product development, merger decisions, and many other projects
The purpose of capital budgeting
is to plot a course of action for the firm. The firm should only take on projects that expand shareholder value
Invest in projects that meet or exceed my investor's required return.
We got multiple investors: debt investors, shareholder - discount rate of capital
The key component to capital budgeting
is to estimate the project cash flows associated with a project
Debt Investors (D) + Shareholders (r(E)) = Discount rate cost of capital
NPV
-Net present Value
-Dollars created today for our shareholders
-extra value created after we pay investors their required return
-values a project in today's dollars
Decision Rule (NPV)
accept if NPV is greater than 0
reject is NPV is less than 0 (doesn't give required return)
NPV greater than 0
-Gave investors their required return plus extra for shareholders
-Investing in positive NPV projects should cause an ↑ in share price
-+NPV = we created value for our shareholders
↑ risk, ↓NPV
What is we are uncertain about our cost of capital?
NPV profile
NPV Profile
x-y graph or NPV(y) vs r(x); shows what is the largest r before project is a bad investment
NPV=0 maximum cost of capital
0 if r less than x%, accept project
0 is r greater x%, reject Project
x% = IRR
Internal Rate of Return (IRR)
the internal rate of return sets the NPV of a project equal to zero. While NPV give you a dollar measure of a project, the ___ give your a percentage return.
Mathematically,
-IRR is 9%
-IRR is rate that sets NPV=o
-Breakeven %
-Profit rate: IRR is return earned on each $ invested
Decision Rule (IRR)
accept if r is less than IRR, r is financing, IRR=profitable
reject is r is greater than IRR
NPV(Pros/Cons)
Pros:
-Direct measure of shareholder wealth
-use cost of capital
Cons:
-Difficult to explain
-Need accurate measure for r
IRR (Pros/Cons)
Pros:
-Easy to explain
Cons:
-Doesn't use cost of capital
-Assume a cash flows are reinvested at IRR rate (unrealistic)
There are three basic types of projects
1) Independent
2) Mutually exclusive
3) Contingent
Independent Projects
investing in one opportunity doesn't prevent me from investing in another
Mutually Exclusive Projects
investing in one project prevents me from investing in another (take best project)
Ex: choosing the best choice for land
Contingent Projects
if you invest in one project, you have to invest in another (all or none)
Project Selection Rules for NPV and IRR
One Project
-NPV: invest is NPV is greater than 0
-IRR: invest if r is less than IRR
Comparing One Time Projects
-Project A + B
Independent Projects: Project A and Project B
-take all good projects
-NPV: take projects with highest NPV (if NPV is greater than 0)
-IRR: take project with largest IRR (r is less than IRR)
Can IRR and NPV lead you to a different project choice when projects are mutually exclusive?
B/c they use different interest rates
r ≠IRR
Reasons for the NPV and IRR Rule to Differ
1) Scale: size of cash flows
-Always defer to NPV
2) Timing of Cash Flows - when you get the cash impacts your project decision
3) Multiple IRR - for every negative cash flow there is one IRR
Contingent Projects
-all or nothing
-NPV: Take all if combined NPV greater than 0
-IRR: Take all if combined IRR are greater than r
each and every profit doesn't have to be good as long as combined yes
Payback Method
-Time
-How long to recover initial investment
-liquidity measure
-more important to small business owners
Two ways to calculate:
1) Repeated project cash flows (annuity)
=initial cost/annual cash flow
2) uneven cash flows
(table with cash flow and N/I)
Major weaknesses of this approach
1) does not use time value of money
2) No set rule on good payback
3) Ignores the time after payback
Secondary Rule
Profitability Index
this rule allows projects to be ranked by efficiency
we use this rules when we have a budget or resource constraint
PI=NPV/Amt. of Resource Used
rank projects from most efficient to least efficient
Modified Internal Rate of Return or MIRR
this rule addresses weaknesses in IRR rule
-IRR: assumes all cash flows are re-invested at IRR%
ALL CASH FLOWS ARE REINVESTED AT THE COST OF CAPITAL