The Chinese philosopher Confucius once said that life is very simple, but we insist on making it complicated.

Complexity in investment often does with a lack of transparency. The highly engineered and multi-layered financial derivatives that contributed to the global financial crisis are a case in point.

For many investors, these products were problematic because their complexity was such that it was very difficult to understand how they were designed, how they were priced and whether the proposed payoffs were right for their own needs.

Of course, there is an incentive for many players in the financial services industry to make investing seem complicated. For some investment banks, for instance, complexity provided a cover for charging higher fees.

In contrast, there are far fewer mysteries about the underlying stocks and bonds traded each day on public capital markets, where prices are constantly in flux due to news and the ebb and flow of supply and demand.

The virtue of these highly competitive markets for most investors is that prices quickly incorporate new information and provide rich information on expected returns. For these thousands of securities, diverse portfolios can be built around known dimensions of expected returns according to the appetites and needs of each individual.

The competitive nature of public capital markets, the efficiency of pricing. And the difficulty of getting an edge are what underpin the ‘efficient markets hypothesis’ of Professor Eugene Fama, who won the Nobel Prize in economics in 2013.

Essentially, the practical takeaway from Fama’s work is that you are better off letting the market work for you rather than beating yourself up adopting complex, expensive and ultimately futile strategies to outguess the market.

Writing in The Financial Times in the Nobel, economist and columnist Tim Hartford said Fama had helped millions of people by showing the futility of picking stocks, finding value-adding managers or timing the market to their advantage.

“If more investors had taken efficient market theory seriously, they would have been highly suspicious of subprime assets that were somehow rated as very safe yet yielded high returns,” Harford wrote.


In The Sydney Morning Herald, journalist and economist Peter Martin said the world owed a great debt to Fama, who had “demonstrated rigorously that if the supermarket crowd is big enough or if they are enough cars on the highway, you will get no advantage from changing lanes. Anyone who could have been helped will have already helped themselves.”


This might be a counter-intuitive idea to many people. After all, in other areas of our lives, like business, the secret to success is to study hard, compete aggressively and constantly look for an edge over our competitors.

One of the other two academics with whom Fama shares the Nobel—Robert Schiller— says markets can be irrational and subject to human error. In this, he is frequently cited as a philosopher opponent of Fama.

In practical terms, though, both men agree that there is no evidence that an average investor can get rich in the markets by trading on publicly available information. Most people trade too much or underestimate the unpredictability or prices.

For example, many investors bought into supposedly sophisticated trading strategies during the financial crisis which left them on the sidelines in the subsequent rebound that drive prices in many markets to multi-year or record highs.