Diversification Across Sectors And Industries

Different sectors and industries react differently to economic events and market conditions, so spreading investments across them mitigates the impact of poor performance in any one sector on your overall portfolio.

Reduction of Unsystematic Risk

Unsystematic risk, or the risk specific to an industry or company, can be significantly reduced through diversification. For instance, if one sector such as technology faces a downturn due to regulatory changes, your investments in other sectors like healthcare or utilities might not be similarly affected, thus stabilizing your overall returns.

Capitalizing on Different Growth Phases

Different sectors perform well at different stages of the economic cycle. For example, consumer staples and utilities remain stable during economic downturns, while sectors like consumer discretionary and real estate thrive in a booming economy. Diversifying allows you to benefit from these varying cycles.

Investing in total market funds is a common strategy for achieving diversification across various industries and sectors. These funds typically track a broad market index, which represents the performance of a wide range of companies across different economic sectors. As a result, by investing in a single total market fund, you inherently spread your investment across multiple areas, reducing the risk associated with concentrating investments in a single sector.

Total market funds still carry the biases of the index they track. For example, some funds might be highly weighted towards certain sectors like technology or finance, depending on the market capitalization of the companies within those sectors. This skew can influence the fund’s performance and may not fit perfectly with your investment goals or risk tolerance.

You will be tempted to correct this by overweighting whichever sectors currently look like the future. Resist it, or at least price what you are doing. A sector tilt is an active bet that the market has mispriced an entire industry’s prospects — the most heavily analyzed information in existence — and the sectors that look most obviously promising are precisely the ones whose prospects are already in the price. If you take a tilt anyway, take it for a structural reason you can state (hedging a concentrated exposure elsewhere, as in section “Human Capital as an Asset”), size it small, and write down in advance what would tell you the thesis was wrong.

Performance leadership within asset classes is unpredictable and tends to shift rapidly. By maintaining exposure to a broad range of asset and sub-asset classes, you can capture gains from the best-performing assets while mitigating the impact of those that underperform. This diversified approach helps in balancing your investment risks and rewards.