Warren Buffett reckons to be a good investor “All you need is emotional control and the temperament to avoid self-destructive behaviour”.  If that is so, why is it so difficult for the average investor?  The problem is we are intuitively “wired” to be lousy investors.

Behavioural finance studies have identified some emotional bias errors, which may explain our shortcomings.


Recency bias

Recency refers to the influence of recent data on our decision making. We look back over the recent past and project / expect more of the same for the future.    “Markets have gone up over the last 5 years so they will keep going up”.    Our decisions are mostly influence by available data on-hand, which is heavily weighted to recent or current information flow.

We have very short-term memories and we fail to learn from the past, forgetting very quickly that we may have faced a similar cycle before.  We tend to let “this time is different” thinking override our past experience, this usually results in poor decision making.

We do not learn from our past experiences.


Loss Aversion

Investors feel the pain of loss twice as much as they feel the pleasure of gains.  We are also twice as sensitive to negative stimuli as to positive.  Unfortunately the newspapers know this, which is why the headlines are always negative; bad news sells!

Loss aversion leads to inappropriate risk budgets, which fail to provide for the investors long-term income and growth objectives.    Experienced investors will sometimes mistakenly hang-on to losing investments while selling their winners not wanting to realise the loss.


Over-Confidence Bias

Successful businessmen are often prone to this bias influenced by their success in business.  They are confident by nature used to be being in control and comfortable taking high risk decisions, usually seeing the “glass half-full”.   Novice traders can also be prone to over-confidence mistaking luck with good decision making.

My favourite quote in this regard is from Charlie Munger, who is Warren Buffett’s partner, “the dawning of wisdom is when you realise you know nothing”.

After 21 years in the investment / advice business I am more convinced than ever that the behavioural finance is the most important driver of long-term returns and investors achieving their objectives.

I will close with another quote from the most successful investor of all-time, Mr. Warren Buffet who said” If you don’t know yourself the stock market is a very expensive place to find out about yourself”.

I honestly believe everyone needs an adviser, who you trust, to help in controlling your emotions and temperament.   But then again Mr. Buffett also said “Don’t ask a barber if you need a haircut”.


Mark Williams
Mcomm, CFP®, HdipTax
T. 021-851 3746
E. service@synfin.co.za




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