Month: March 2018

The 80/20 Rule and Disproportional Payoffs

Investor Behavior

By Dan Erdle

Introduction

The Pareto Principle, known more popularly as the 80/20 rule, states that 80% of results are explained by only 20% of the inputs. Only a small amount of our time, energy, money, and decisions are responsible for a large amount of our outcomes. The Pareto principle also means that we waste much of our time on things that don’t really matter. In trying to explain the world around us we easily become distracted by noise. Instead, in trying to understand the world, we should focus our attention on figuring out the small number of things that lead to disproportionate payoffs.

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What The Investment Industry Gets Wrong About Risk

Risk

By Dan Erdle

Overview

The modern way to approach risk, and the one used by the financial industry, is to define risk as volatility. If something moves up or down a lot, that means it is risky. The financial world has even come up with a mathematical way to measure risk called beta. If you take a finance class or hang around hedge fund professionals, you will learn all about mathematical formulas involving beta and how beta (volatility) determines how risky a financial asset is.

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