Understanding Correlation in Portfolio Management
Investing successfully goes beyond finding the best returns on an investment. Professional managers of investment portfolios pay considerable attention to the relationship between the investments in a portfolio. Understanding the correlation between the different investments in a portfolio is one of the main tools that they use to assess the strength of the portfolio’s diversification.
Whether in equities, bonds, real estate, digital assets and more, understanding the correlation between each investment will allow investors to build portfolios that can stand the test of time while minimizing risk.
What Is Correlation?
Correlation is a statistical measurement of the relationship between the movements of two investments.
The values for the relationship between two investments can range between -1 to +1.
+1 indicates that two investments move together
0 indicates there is no relationship between two investments
-1 indicates that two investments move in opposite directions
Investments will lie somewhere within these values and will change depending on the economic conditions.
Understanding the relationship between investments will allow investors to build portfolios that do not depend on the upturn of a particular market.
Why Correlation Matters for Investors?
Diversification is predicated on investments having differing relationships to economic events.
Putting all investments into a portfolio that have a high degree of correlation with each other will result in significant losses should the values of each of these investments fall.
By incorporating investments with low correlations into an investor’s portfolio, they can:
Experience less volatility in the value of their portfolio
Experience an improvement in their returns on the investments in their portfolio
Limit the risk of excessive concentration of investments in their portfolio into a few key assets
Increase the resilience of their investments during downturn markets
Improve the performance of their portfolio over time
Professional investors study the relationship of investments in the same portfolio as they make their decisions regarding the allocation of funds.
Correlation Across Asset Classes
Not all asset classes exhibit the same relationship to each other. For instance, the relationship between equities and government bonds varies from that of digital assets and real estate. The relationships between asset classes include but are not limited to:
The relationship between equities and government bonds
The relationship between digital assets and real estate
The relationship between commodities and inflation
The relationship between real estate and interest rates
The relationship between currencies and international equities
These relationships will change over time, and understanding these relationships will allow investors to adjust their portfolios to remain effective.
Economic Conditions Influence the Relationship Between Investments
The relationship between investments will change depending on the state of the economy. For instance, the correlation between equities and government bonds will differ between a period of high inflation and low inflation. Economic factors that can change the relationship between investments include but are not limited to:
Inflation
Interest rates
Economic growth
Monetary policy
Market volatility
Geopolitical developments
During times of financial stress, the relationship between investments will change their individual correlations to minimize risk.
Understanding how the relationship between investments will change with the economy will allow investors to adjust their portfolios as economic conditions change.
Sector Correlation Within Equity Markets
Even within the equities market, different sectors have different relationships to each other. For instance, technology and financial services have different relationships to the economy than sectors like healthcare or consumer staples. Some examples of equity market sectors include:
Technology
Financial services
Healthcare
Consumer staples
Industrials
Energy
By understanding the relationship of each of these sectors to the economy, portfolio managers can create more balanced portfolios within the equities market.
Correlation and Risk Management
Professional investors use the concept of correlation as part of their risk management strategy for investments in a portfolio. Portfolio managers study the following factors regarding a portfolio’s risk:
Concentration of assets
Geographic exposure
Sector representation
Currency exposure
Volatility of the portfolio
By studying each of these factors, portfolio managers can incorporate investments with varying degrees of correlation into a portfolio to minimize risk.
Correlation analysis is one of the tools that can aid an investor in constructing a diversified investment portfolio.
Correlation Is Not Constant
The relationship between investments is not constant and will change over time. For instance, a high degree of correlation between two investments can shift to a low degree of correlation over time. Factors that can change the relationship between investments include but are not limited to:
Changes to the country’s monetary policy
Inflation cycles
Economic events that occur across the world
Investor sentiment towards the markets
Changes to the structure of industries
By understanding that the relationship between investments changes over time, investors can adjust the portfolios to which they contribute their funds.
Technology Improves the Study of Correlation Between Investments
Investment management firms use technology to study the relationship between their investments. Technologies that can aid in the study of correlations between investments include but are not limited to:
Artificial intelligence
Quantitative analysis
Simulations of the markets over time
Predictive analytics
Scenario analysis for the markets
The insights provided by technology can help portfolio managers to study the market and the relationship between their investments more efficiently.
Technology enhances the capabilities of the professionals who manage investments, rather than replacing them.
Practical Applications of Understanding the Relationship Between Investments
By understanding the relationship between investments, investors can make more informed decisions about their investments. Such decisions may include:
Finding improvements in diversification of the investments in a portfolio
More effectively evaluating new investments to add to a portfolio
Finding ways to reduce the concentration of investment funds in specific investments
A more thorough understanding of the risks that investments pose to an investor
Finding ways to enhance the performance of portfolios over time
These benefits of understanding the relationship between investments make it an essential aspect of investment management.
Portfolio construction is just as important as the individual decisions made to select investments to purchase.
Key Takeaways
Correlation is an important concept in the world of investments. By understanding the relationship between investments, investors can construct portfolios that will exhibit reduced risk, improved returns over time, and be able to stand the test of time in a market that will experience periods of growth and contraction alike.
Conclusion
The relationship between investments is a foundational concept in the world of investments. By understanding this concept, investors can construct portfolios that will be able to stand the test of time, exhibit less risk, and experience fewer periods of volatility in their investing portfolio. For these reasons, understanding the relationship between investments is an essential concept in the creation of investment and financial market strategies.