Tag Archives: guest posts

The Structural Flaw in Data-Driven Quantitative Analysis

Rodin's ThinkerPeople who lean more towards fundamental analysis tend to think differently than others using alternate methods. There is a distinction between those people that rely on news and statements by management and fundamental analysts who rely solely on numerical analysis, which are probably more like technical analysts in their thought processes. Those who take a qualitative approach tend to question their assumptions more, because they rely on opinions and obviously everybody who engages in any kind of analysis should always question the underlying assumptions and learn the limitations of their systems.

I want to make it clear that I am not deriding technical analysis as a foolhardy approach. Even the most rigorous fundamental analysis is subject to the issues I discuss here. However, the severity and prevalence of the issues for fundamental analysis is lower. Technical analysis by its very nature exposes itself to the flaws of forecasting.

The Security Blanket of Numbers

Fundamental analysts using a numerical approach are not ultra-reliant on historical analysis to the extent that they limit exposure to assumptions regarding the future, however they share their faith in numbers with technical analysts. Rarely is the world so black and white, and often you might find yourself using a mixed approach. Something about the way we are wired makes us more comfortable trusting calculated numbers than the statements of individuals. I might not be exposed to a representative sample of people, but I see this worship of numbers far too often. It could be due to the fact that most people I know are science and engineering types. If you are surrounded by people more attuned to the philosophical theory of knowledge it might be different. Continue reading