Do portfolio managers in South Africa consider human behaviour issues when making investment decisions or advising clients?

Abstract

The efficient market hypothesis is based on the assumption that individuals act rationally, processing all available information in their decision-making process. Prices therefore reflect the appropriate risk and return. However, research conducted regarding the ways that investors arrive at decisions when faced with uncertainty, has revealed that this is in fact not always the case. People often make systematic errors, the so-called cognitive biases, which lead them to less rational behaviour than the traditional economic paradigm predicts. These cognitive biases have been found to be responsible for various irregular phenomena often observed in financial markets as(turbulence or, volatility, seasonable cycles, "bubbles", etc. Behavioural finance attempts to explain some of the changes in the financial markets that can not be explained by the efficient market hypothesis. This research reviews some results from the behavioural finance and other related literature. A survey was also done to determine whether the most prominent portfolio managers in South Africa are aware of behavioural finance issues/models and consider the influence of cognitive issues when making investment decisions or giving advice to clients.