There is no such thing as a magic indicator that will tell you when to buy and sell the
S&P 500 (
SNPINDEX: ^GSPC )
, and we Fools do not recommend timing the market. However, Foolish
investors can use the following indicator to decide whether to be
fearful of a sustained market fall or not. It can also help keep you
from panicking in the event of a market dip.
Moreover, being cautious doesn't always have to
involve selling out of the market. For example, you could always buy
some downside protection for your portfolio with a short ETF like the
Short S&P Pro-Shares (
NYSEMKT: SH ) ETF or get some protection from volatility with the
ProShares Ultra VIX Short-Term ETF (
NYSEMKT: UVXY ) . You could even increase your bond holdings (which can outperform in a recession) with
Vanguard's Total Bond Market ETF (
NYSEMKT: BND ) .
Household net worth and the S&P 500
The
idea is simple. Most economic trends will usually manifest themselves
in a change in U.S. household net worth. In turn, how U.S. households
feel about their finances will affect consumption, real-estate markets,
business investment, and a whole host of factors that influence the
stock market. In other words, follow U.S. household net-worth trends,
and you are following a sentiment indicator for the S&P 500.
The Federal Reserve publishes
this data on its website.
The data comes out a quarter after the period in question, but no
matter -- this analysis is for strategic considerations, not for market
timing.
In the graphs I use to illustrate this indicator,
the correlation between household net worth and stock market performance
shows when sequential growth in U.S. household net worth is below 1%
for at least two running quarters.
The 1960s
There were two
instances in which this correlation showed during the 1960s. The first
was in Q1 of 1962, and it's a short trend only lasting two quarters.
Moreover, Foolish investors should note that the S&P 500 fell 16.8%
in Q2, and this surely had a negative influence on net worth. However,
this impact didn't last.. In fact, net household worth then increased by
1.8% in Q3 of 1962 and by 4.8% in Q4.
Those who waited for a good quarter or two to
confirm that net household wealth was rebounding were probably
optimistic again when the S&P 500 reached about 66 points. In a
sense, the indicator tells you not to worry too much about a stock
market fall, because it isn't really caused by, or even creating, any
significant drop in wealth.
The numbers on the left-hand side refer to
household net worth, and the numbers on the right-hand side show the
level of the S&P 500. The numbers in the middle of the graph show
how many consecutive quarters saw household net worth grow by less than
1%.
]Source: Federal Reserve, Yahoo Finance, author's analysis.
The second slowdown in household-net-worth growth lasted for six
quarters, during which the S&P dipped at least 20% before it went up
again.
1970s
While the 1970s began in
a negative fashion, it only took three quarters before U.S. household
net worth starting growing sequentially by more than 1%, with 3.4%
growth recorded in Q3 1970. As the data is reported in Q4, the S&P
500 is likely to have stood around 95. The S&P 500 index then rose
nicely until household-net-worth growth slowed to 0.5% in Q1 of 1973 and
0.8% in Q2.
While it's true that household-net-worth growth of
3.8% in Q3 1973 was something of a false friend -- it would have
encouraged you to be optimistic around the 96-point level -- note that
the cautionary indicator gave another signal in the next quarter at
about 90. Furthermore, the index falls to the low 70s in the quarters
afterward.
When data was released that demonstrated U.S.
household net worth trending positive again, the index bounced back to
about 87. Again, you would have missed some upside with the bounce-back,
but you also missed the pain of the violent drop in the markets
beforehand..
Source: Federal Reserve, Yahoo Finance, author's analysis.
Perhaps the most important point is that net worth
increases nicely from the mid 1970s onwards, thus encouraging long-term
investors to stay in the market and buy on the dips. While the increase
in net worth in the 1970s is somewhat illusory in real terms (because of
inflation), stock prices should go up with inflation, too.
The bottom line
In conclusion,
there is scant evidence from the 1960-1980 period to suggest that this
indicator is useful for market timing, but it does appear to be a useful
primer for thinking about some downside insurance in the form of the
ETFs mentioned earlier. Insurance can be bought by hedging your
portfolio with some short ETFS as mentioned above. Alternatively, if you
are worried about a sudden and violent drop, then buying a volatility
ETF may benefit you. If you are worried about a protracted slowdown,
then bonds could outperform, so a bond ETF might fit the bill.
For long-term investors, the indicator simply
provides a good read on the underlying strength of the economy,
particularly in periods where the index is indicating weakness. In other
words, it will encourage you to stay in the market when short-term
noise suggests otherwise.
In the next article, I will cover the 1980-2013 period, revealing an
amazing fact about the 1987 stock market crash, demonstrating how this
indicator would have helped you in 2008, and ultimately arguing why
investors should stay bullish right now.