Growth versus Value and Slice and Dice
First, let's try to explain the difference between
Growth stocks tend to have Price/Earnings ratios greater than
average, tend to be over-priced with higher price-to-book ratios ... but there's an expectation of dramatic future earnings
>That's why people invest in them?
Yes. It's the rosy future that investors see. On the other hand,
Value stocks tend to be cheap with P/E Ratios smaller than
average, out of favour stocks with (perhaps) greater-than-normal dividend yields and little
or no sales growth ...
>Why on earth would investors ...?
They see under-priced, overlooked stocks with great future potential.
>You're kidding, right? Stocks that'll tank and ...?
Actually, if we look at the Growth and
Value stocks in the S&P 500, as identified by
>Barra? How do they identify ...?
According to Barra:
The value index contains firms with higher book-to-price ratios; conversely, the
growth index has firms with lower book-to-price ratios ...
>I don't think I'd like Value stocks ...
Take a look:
If we plot the gains over some twenty-five years
we get the following chart of the two classes (compared to the S&P 500).
>Whooeee! I like Value!
Well, the chart is a bit misleading.
Suppose we invest for just five years and look at the gains over a moving 5-year interval.
>That means ... what?
We calculate the annualized return for the previous five years, for Jan, 1979 then do it
again for Feb, 1979 then for Mar, 1979 then ...
>Okay, I get it.
Anyway, we'd see that the better return is sometimes Value
and sometimes Growth so sometimes one or the other is in favour
so one might consider covering all bases and investing in both so that ...
>So that gain is maximized?
Gain maximized, or maybe risk or volatility is minimized.
>Risk minimized? How'd you define Risk? Is it ...?
We could define it as Standard Deviation (or Volatility) or ...
>Please! Not that!
Okay, how about like so:
Each year we calculate the Mean Annual Return and the Standard Deviation over the previous
N years and compute
1/(1 + Mean - SD2/2)
and call it Risk. For Fig. 2a, N = 10
>That formula for risk ... is it ...?
It's an estimate of 1/(1 + annualizedGain)
... see Gain Estimates.
>So, what's this Slice and Dice stuff?
One chooses equal parts Growth and
Value and ...
>Sounds like a recipe. Slice and dice onions and mix equal parts ...
Pay attention. We consider four asset classes.
Large Cap Growth, Large Cap Value, Small Cap Growth, Small Cap Value.
We invest 25% in each and rebalance our portolio to maintain this 25% figure. If we use the
Barra Indices we get the following:
>Wait! Value should be better than Growth, according to your earlier chart!
Surprise! I said that sometimes Growth is better, sometimes
Value, depending upon the time period. The above chart is
for the period since 1994 and look at Fig. 2 to see whose been winning since ...
>Why not go back to 1975?
These four Barra indexes are available only back to 1994. In any case, I'm not interested in
25% in each of 4 asset classes, often called
4 x 25 or
the Coward's Portfolio
(a term coined by Bernstein who said:
"... if history is any guide, a portfolio divided equally among these four assets will most likely outperform
the overwhelming majority of investment professionals over the next few decades.").
I'm interested in the question:
>If that's the question, then what's the answer?
I have no idea ... but let's cogitate on it.
>Wake me up when you're finished.
If we were interested in minimizing the Volatility (or Standard Deviation), then we can do better
(at least for that particular time period) by choosing something other than
4 x 25.
For example, here we get a Standard Deviation of 14.4% for a different mix:
Look! I found some
Fama & French
data back to prehistoric times:
The chart gives the annualized returns as well as the Volatility (or Standard Deviation) and ...
Look! It's slice&dice (Fig. 6) versus cut&chop (Fig. 7):
If we consider the period 1950 to 2000 (that's 51 years), and use the Mean Annual Returns
and Standard Deviations for just LargeCap Growth and Value, and SmallCap Value ...
Anyway, we'd get a minimum Volatility for 90% LargeCap Growth + 10% SmallCap Value.
>What happened to SmallCap Growth?
Let's ignore it ... it hasn't performed that well. Of all five-year periods in the past
fifty years, SmallCap Growth was the best performer in only 8.5% whereas ...
>And the others?
I was just about to tell you. It's like so:
LargeCap Growth 17.0%
LargeCap Value 31.9%
SmallCap Growth 8.5%
SmallCap Value 42.6%
Anyway, we can generate a Frontier which
gives us the fractions of each asset class which minimizes the Standard Deviation of our
>Did you say Frontier?
Yes. See Frontier Stuff.
>No Large Cap Value? Why not?
T'ain't me who says that, it's the spreadsheet which does the calculations. Of course, we may
be more interested in minimizing the Risk rather than the
>How do you define "Risk"? Isn't it the same as ...?
Volatility? Not to most people. However, there are plenty of definitions of risk. For example,
we might say "If my annualized return is less than 5%, that's risky
... hardly keeping up with inflation."
Okay, suppose we consider all the 30-year periods starting in January, 1940 and running for 30 years,
then starting in February, 1940 and running for 30 years, then starting in March ...
>Okay! I get the idea. So?
So we pick one of these 30-year periods at random (meaning we pick the starting month at random)
and compute an annualized portfolio return,
assuming we had invested in Small Cap Value or Large Cap Growth etc.. We see if this annualized
return was less than 5%. Then we do it again a thousand times, picking a
random year and running out for 30 years. The percentage of these 1000 simulations which gave
a return of less than 5% is charted as well as ...
>Are you going to give me a picture ... or not?
Here's a picture.
>What's all that other stuff?
It also gives the percentage of simulations which gave an annualized return greater than 10%. It
also gives the survival rate for a portfolio where you withdraw 4% of your original portfolio,
annually, and this amount increases with inflation.
The inflation (actually the increase in Consumer Price Index) for the year which was chosen at random.
>Are you saying that, had I invested in Small Cap Value,
that it had absolutely no 30-year period where I'd have made less than 5%?
That 0.0% of the simulations had a return less than ...?
Remember, this is Monte Carlo, not reality. What'd happen in the future is unknown.
However, I think that Small Cap Value is getting a bum rap as the riskiest asset class just
because its Standard Deviation is large ...
>Is there a spreadsheet for this stuff?
See Sensible Withdrawals where it describes
a spreadsheet which looks like
The spreadsheet has a component which is explained like
for Part II