Stifel
Investment Strategist
Investment Strategist
Behavioral Finance and Irrational Investing                   Rollover Center    
In 1996, then-Federal Reserve Chairman Alan
Greenspan coined the term “irrational exuberance"
in an address to describe investors’ attitudes
towards what he viewed as an overvalued stock
market. It is often used to describe the impact
that manic speculation and emotional decision-
making can have on the financial markets. The
soaring prices of “dot-com" stocks in the late
1990s and early 2000s and housing in 2007 and
2008 provided textbook examples of irrational
exuberance in action. But while the subsequent bursting of those bubbles resulted in significant
financial losses for many investors, will those same investors learn from their mistakes the next
time a boom and bust period occurs.
“Buy low, sell high" may sound like a simple formula for investing success, but history has
proven that, for many, adhering to this precept is often easier said than done. In recent years, the
field of behavioral finance has emerged to help explain why investors act the way they do, studying
such behaviors as herd mentality, overconfidence, excessive aversion to risk, and bias towards
recent market results. Any of these behaviors can be very damaging to a portfolio.
What Is Behavioral Finance.
The efficient market hypothesis states that it is impossible to beat the market because stock
market efficiency causes existing share prices to incorporate and reflect all known information.
It assumes that investors behave in a rational, predictable manner. However, this theory largely
ignores emotional biases (either on an individual or collective basis) that can lead investors to
make irrational decisions that can cause large fluctuations in the market. Behavioral finance seeks
to explain which psychological and emotional factors influence individuals’ investment decisions.
As you work toward your financial goals, developing an understanding of these factors, removing
emotion from your investment decisions, and not worrying about the short-term individual losses
and gains in your portfolio will make it easier for you to maintain perspective.
Taking the Emotion Out of Investing
The good news is that there are certain measures you can take to help reduce the emotional factor
of investing and help protect your portfolio from the extreme market volatility caused by irrational
exuberance. Adopting a long-term approach, diversifying your portfolio, and utilizing the power of
dollar-cost averaging are all simple ways to be less emotional in your investment decisions.
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Adopt a Long-Term Approach
Behavioral finance reveals that humans are prone to focus on the short term, even at the
expense of the long term. Due to the inherent risk involved in investing in the stock market,
it’s wise to take a long-term approach. Consider investing in equities for financial goals that
are at least five to ten years down the road, if not longer. Short-term goals (for needs occurring
in fewer than five years) may be better served by more conservative investments.
Investing for the long run can help you prevent two common behavioral mistakes that
investors make: bias towards recent market results and herd mentality. Recency bias occurs
when investors ignore long-term trends, considering only recent market developments when
making investment decisions. Because of the recency effect, for instance, stocks with high
values become popular with investors, who buy more shares, which then continues to drive
prices upward. It also means investors are likely to be easily scared off by short-term losses
even if there has been no fundamental cause for alarm.
Long-term investors are also less likely to adopt such a herd mentality of buying stocks that
the general public perceives to be “hot," or selling off stocks that have temporarily fallen out
of favor simply because of the perception that everyone else is doing it. However, those
who take this “lemming" approach may find themselves getting out of the market too early
or getting back in too late. Looking back over the history of the stock market, it has been
repeatedly demonstrated that the best time to invest is during periods of great pessimism
and the best time to sell is during periods of unbridled optimism, yet the vast majority of
us do the exact opposite.
Diversify Your Portfolio
Generally speaking, it is usually unwise to put all of your eggs in one basket, but
unfortunately, many investors may find themselves doing just that. Maintaining a diversified
portfolio, while not ensuring a profit or protecting against loss, may help you benefit from
market upswings while minimizing the impact of downswings. There are three keys to
diversification:
1. Incorporate a mix of investment vehicles, such as stocks, bonds, and cash.
2. Vary the risk in securities so that large losses in one area may be offset by gains in
other areas.
3. Vary your securities by industry or geography to minimize the impact of industry-
or location-specific risks.
Dollar-Cost Averaging
Many investors have tried to time the market, buying and selling stocks at what they consider
to be the perfect time. This can often be a recipe for disaster, as many who adopt this strategy
have portfolios that underperform as compared to the market as a whole. Dollar-cost averaging
can help reduce the risk of investing at the wrong time and potentially allow you to take
advantage of the ups and downs of the stock market.
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Dollar-cost averaging is simply investing equal or fixed amounts of money at regularly
scheduled intervals. With this investment strategy, you will buy more shares when the price
of your investment has declined and fewer shares when the price has risen. Over a period of
time, you may lower your average cost.
With dollar-cost averaging, you may reduce investment risk by not investing substantial
amounts at the wrong time. In addition, dollar-cost averaging forces you to invest on a regular
basis, making it well suited for long-term goals, such as retirement. By investing on a regular
basis, you can avoid making bad decisions based on emotions, such as the natural tendency
to stop investing in a weak market.
Investors need to consider that dollar-cost averaging does not assure a profit or protect
against a loss. Before embracing the dollar-cost averaging strategy, investors should consider
their ability to continue investing during periods of falling prices.
With dollar-cost averaging, the investment amount and frequency are up to you. The
success of dollar-cost averaging doesn’t depend on the amount or frequency you choose;
what matters is that you stick to your plan, regardless of what happens in the market. For this
reason, make sure that the investment amount you choose is consistent with your financial
means, so that you can continue to purchase shares even through periods of low share prices.
Stick to Your Plan With Automatic Investing
Many investors know that they should be investing for the future, but don’t always have a
lot of cash on hand. Or, perhaps they think investing requires a lot of money up front. There’s
a remedy to these problems. Your Financial Advisor can help you establish an automatic
investing plan – which will allow you to benefit from dollar-cost averaging – by arranging for
a set amount to be deducted automatically from your paycheck or directly from your bank
account. With Stifel’s Payroll Direct Deposit service, you can have as little as $25 from each
paycheck deposited directly into your Stifel account. With direct deposit, you can put money
aside before your monthly bills eat away at it. There’s no need to budget for investing, and
this convenient service is free of charge.
Get Professional Advice
Fortunately, when it comes to working towards
your financial goals, you’re not alone. Your
Stifel Financial Advisor is available to provide
objective advice to help you avoid making
rash decisions that could adversely affect your
portfolio. By taking the emotion out of investing
and adopting a methodical, long-term approach,
you’ll be more likely to meet the objectives
you’ve set for yourself.
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