KEEP MONITORING
Another practical tool you can use is a matrix, like the
one in the table below. It lists the stocks in your port-
folio on one axis and various risks on the other. Then,
next to each corresponding stock/risk box you indicate
whether the given risk factor would be a positive, neg-
ative, neutral or “don’t know”.
There are several benefits to this approach. First, it
forces you to confront the various risks your portfolio
faces. This is especially timely when we’ve been in
relatively calm financial seas recently. Second, it encour-
ages you to thin k of as many risk factors as possible and
go through the healthy thought experiment of consid-
ering their impact on each of your investments. Of course,
this involves a high degree of informed estimation. Third,
it allows you to see which risk factors you’re most exposed
to. You might also make some improvements to the table
(for example, you may be able to visually represent the
weightings in each stock by colour coding or even
changing the size of the rows).
Importantly, this approach is not about predicting risk.
It’s about making sure you’re prepared for the outcome
of a wide range of events and ensuring that you’re not
going to suffer financial ruin from any one of them.M
- Mining stock A (60% underpriced)
- Mining stock B (50%)
- Mining stock C (40%)
- Supermarket retailer A (35%)
- Medical stock A (35%)
- Medical stock B (30%)
- Mortgage broker A (25%)
- Medical stock C (20%)
- Specialty retailer A (20%)
- Infrastructure stock A (15%)
A concentrated portfolio constructed from this list
might look like the chart at right. The two key aspects
of this portfolio are that higher allocations are made
to the more underpriced stocks but that risk factors are
carefully taken into account.
For instance, you can see that Mining stock C and
Medical stock C have been omitted altogether, even though
they’re more underpriced than stocks below them on the
list. That’s because underpricing is no guarantee of a good
outcome. Every stock has risks and you don’t want to be
over-exposed to any single risk factor or sector.
As Thorp explains: “Betting too much, even though
each individual bet is in your favour, can be ruinous”.
As a concentrated investor, my top priority is avoiding
ruin (losses from which the portfolio is unable to
recover). Part of my protection at this point is holding
a hefty amount of cash. Relative to a more normal
level of 5%-10%, I’m currently in the 15%-20% range
given recent favourable market conditions.
Underpricing is
no guarantee of
a good outcome
SAMPLE PORTFOLIO
Mining stock A
Mining stock B
Medical stock B
Mortgage broker A
Cash
5-10 other
stocks
Infrastructure stock A
Specialty retailer A
Supermarket
retailer A
Medical stock A
RISK FACTOR MATRIX
RECESSION INFLATION PROPERTY CRASH MAJOR TERROR INCIDENT
Westpac Negative? Negative Neutral
BHP Billiton? Positive? Neutral
Woolworths Neutral Neutral Neutral Neut./Neg.
Computershare Neutral Positive Neutral Neutral
Newcrest? Positive? Positive
QBE Insurance Neut./Neg.?? Negative
Greg Hoffman is an independent financial educator,
commentator and investor. He is also chairman of Forager
Funds Management.
Disclosure: Private portfolios managed by Greg Hoffman
own shares in BHP Billiton and Computershare.