Why We Diversify
The simplest and truest reason as to why we diversify is that we don’t know what assets will do very well in the future, and which assets will do poorly. Diversification is the evidence that we cannot accurately and consistently forecast the future. When we invest during a period where one asset vastly outperforms all others, it can be very frustrating to remain diversified. We may be tempted to sell the underperformers and invest more heavily in that which is outperforming. Despite these inclinations, there is strong evidence to suggest that diversification is the best strategy.