Diversification
and Starndard Deviation:
When
the word diversification is used many different meanings can come
to mind. First there is the diversification among different types
of investments: checking accounts, mutual funds, stocks, real estate,
futures, ect. Second is diversification within certain investment
vehicles like mutual funds. While these are not the only subjects
in diversification, they are two of the most common. The second
of the two is the diversification I want to discuss with this special
report.
Being The No-load Fund Advisor, it should come
as no surprise that I want to talk about diversification within
mutual funds. Why diversify, the two best reasons are 1.) to increase
safety and 2.) reduce the standard deviation on your returns. Watch
it Garry. You're talking like a investment guy again. Just
stay with me and everything will be explained.
Diversification increases your safety. We've
all heard the saying don't put all you eggs in one basket. A mutual
fund by design invests in many different securities. By purchasing
a mutual fund the investor becomes instantly diversified. Instead
of owning one or ten stocks the typical stock mutual fund may own
50, 100 or more stocks. This is important diversification. If one
of the companies owned runs into trouble then there are 99 more
to take up the slack. This is important but still not the area I
really want to cover. The standard deviation of returns is the area
of diversification I want to cover.
Standard Deviation of return conceptually works
the same whether the diversification is among different stocks or
different markets. I will use the different markets in this discussion
because it is a service we provide at the No-Load Fund Advisor that
very few investment advisors do. That way I can use this article
again in a brochure some day.
Standard Deviation of return or just Standard
Deviation can be best illustrated by an example. Look at the table
1, there are two set of date, lets pretend they are returns from
investment advisors.
Table
1
Data
Set |
1
|
2
|
3
|
4
|
5
|
Average
|
Standard
Deviation |
A
|
30
|
-15
|
35
|
42
|
8
|
20
|
23.34
|
B
|
18
|
22
|
20
|
16
|
24
|
20
|
3.16
|
Both sets have the same average return of 20% per year,
however, set A has a standard deviation of 40 and set B's standard
deviation is only 3. The standard deviation tells us how close,
on average, each separate element of data, perhaps yearly investment
returns, is to the average. In other words, standard deviation gives
us a measure of how close and consistent the actual separate elements
of date are to the average. So why didn't I just use consistent
instead of standard deviation? Because consistent is not an investment
word and this is an investment news letter. Actually, because standard
deviation tells us much more about the data that makes up the average
then the average alone ever could. In table #1 the average long
term return is the same between A and B, however, the degree of
risk associated with those returns is dramatically different. Which
portfolio do you want your money in? If you need money some where
with in the period of time covered then what you would get out would
differ dramatically. Thanks Garry. That was really interesting,
no really, we mean it..
O.K., I know that it is not earth shaking news;
but, here is the point. When we diversify throughout different market
places (bonds, domestic stocks, European stocks, gold, international
bonds, ect.) we can increase our safety, our returns and lower the
standard deviation of those higher returns. Take a look at chart
# 1.
|