This article was published in
Arab Times.
It is widely believed that recent years have
suffered historically high volatility in stock market returns. Following
an earlier article in the Financial Times (FTfm supplement) Rodney Sullivan, Head of Publications at CFA Institute and Mandagolathur
Raghu, President of CFA Kuwait both put today’s
market volatility into historical context, and discuss the various sources
underpinning market riskiness over time.
How does recent market volatility compare historically?
Recent years had
seen relatively higher market volatility.
However, many observers would be surprised to know that since 2000, a
period widely viewed as encompassing high uncertainty, markets have
demonstrated market volatility near long-term historical averages,
overall. For example, from 2000 to 2011,
the annualized market volatility for MSCI to Europe Australasia and Far East
was 19 percent as measured by standard deviation of returns. However, that same level of volatility is
consistent with that observed during the last 40 years (1971-2011). Interestingly, looking further back in time,
even recent market volatility is not a jaw dropper. For the 40 yr period 1926-1971, data shows
that volatility for large-cap U.S. stocks demonstrated a 25 percent annualized
volatility as compared to around 22 percent during the most recent three
years.
How do the GCC markets measure up on this?
In general GCC markets exhibit higher risk compared to emerging
markets, but GCC markets lack extensive history and therefore we should be
cautious before making any definitive conclusions. However, going by the
standard metric for risk i.e., standard deviation, the near term risk for GCC
markets is lower than long term risk in line with the trends observed above.
The annualized risk for the last two years for S&P GCC index is 15% while
the same for the last 5 years is nearly 25%. Even other risk measures point to
the same trend. For example, the maximum drawdown (defined as peak to trough
fall) during the last 2 years was 10%, while the same for the last 5 years was
a staggering 62%.
Markets are therefore as risky now as in the distant past?
Looking back, market
volatility, while certainly the highest most of us can recall, it’s not at all
unprecedented. However, volatility is
but one measure of risk. Additional
consideration should be given to other measures such as available liquidity,
the amount of leverage employed, and portfolio drawdown associated with market
disruptions, where markets suddenly exhibit large negative returns as witnessed
during the global financial crisis in fall 2008 and the so-called “flash crash”
in May 2010.
Are markets now more susceptible to these sudden disruptions?
Even though overall
standard deviation is now roughly in line with historic measures, standard
deviation is but one measure of risk.
Research has shown that markets are more vulnerable now to sudden
reversals than formerly. So, yes,
markets increasingly appear hypersensitive to unexpected news or events
impacting markets adversely.
Why is market vulnerability on the rise?
Studies suggest a
number of possible culprits for the rise in market vulnerability. Assets
invested in passively managed equity mutual funds and exchange-traded funds
(ETFs) have grown steadily in recent years, reaching more than $1 trillion by
the end of 2010. More importantly, ETF
trading now accounts for roughly one-third of all trading. ETF trading is accomplished largely by basket
trading or the simultaneous buying or selling of the many stocks within a given
index. Consequently, stocks within that basket or index tend to move together
throughout the trading day. This, in
turn, increases market correlation to unexpected news or events—an undesirable
effect on markets.
What are other reasons behind the rise in vulnerability?
The rise in index
trading is, of course, only one possible contributor to this phenomenon. A second possible source relates to active
mutual funds that are managed against an index benchmark. Research indicates
that the level of closet indexing among active managers has been noticeably
increasing since around 1995. Given that
many active funds are managed relative to specific benchmarks, say the S&P
500 Index, their trading is likely to be concentrated in underlying
constituents of the respective index benchmark.
As such, these funds may also contribute to the rise in market risk
through basket-type trading. Another
possible source relates to the rise of various quantitative investment
strategies. Overall growth in such
investing may contribute to periodic disruptions as all quant managers find
they are trading the same securities on the basis of similar quant-driven
signals. Finally, we can also look to
the role human behavior plays in market activity and aberrations. As social
animals, certain embedded cognitive and emotional behaviors lead us to make
errors in judgment precipitating market disruptions. Consider how we are often
overconfident in our ability to manage investment risk leading us to fall into
the trap that the future is predictable rather than uncertain.
Are there other reasons behind the rise in vulnerability for the GCC?
The factors which contribute
to volatility in the global context (like high ETF trading or basket-type
trading) may be less at play in the GCC. Index trading is still not that
popular compared to active management of funds. For GCC, lack of institutional investors
may be contributing to higher risk coupled with low liquidity. Domination of
retail trade may also induce behavioral biases contributing to higher risk.
What does this increased vulnerability mean for investors?
Whatever the drivers
behind the rise in market vulnerability in recent decades, the result are a
meaningful decrease in the current ability of investors to diversify risk. This
is particularly important for portfolio management because diversification is
less effective where there is both increased market volatility, and
company-specific volatility. These changes have introduced additional
challenges for risk management in equity portfolio construction. Furthermore,
the diversification benefits of equity investing have decreased for all styles
of stock portfolios (small-cap, large-cap, growth, and value). Specifically, an
investor looking to maintain the same level of risk relative to the market now
needs to meaningfully increase the number of stocks held. So the ability of
investors to diversify risk by holding an otherwise well-diversified portfolio
has markedly decreased in recent decades.
All investing, indexed or otherwise, currently appears a more risky
prospect for investors. Investors can
improve their investment processes by incorporating the impact of increased
market risk into their risk-modeling and asset allocation framework.