Diversification
Diversification spreads exposure across different investments so one failure has less influence on the whole portfolio.
- Explain diversification in clear language.
- Apply the concept to a realistic student scenario.
- Identify at least two mistakes or risks.
- Complete a practical activity and evaluate the result.
The central idea
Diversification spreads exposure across different investments so one failure has less influence on the whole portfolio.
It reduces avoidable concentration risk, although it cannot eliminate market losses. The purpose is to build a decision process that still works when money is limited, circumstances change or emotions are strong.
Key concepts
Excessive dependence on one exposure.
The tendency of investments to move together.
A broad category such as shares, bonds or cash.
A step-by-step method
- Diversify across companies and industries
Ask what evidence, assumptions and trade-offs are involved. Record your reasoning so it can be reviewed rather than relying only on memory.
- Consider countries, currencies and asset classes
Ask what evidence, assumptions and trade-offs are involved. Record your reasoning so it can be reviewed rather than relying only on memory.
- Look through funds to underlying holdings
Ask what evidence, assumptions and trade-offs are involved. Record your reasoning so it can be reviewed rather than relying only on memory.
- Avoid adding many investments that behave almost identically
Ask what evidence, assumptions and trade-offs are involved. Record your reasoning so it can be reviewed rather than relying only on memory.
Applying the lesson
Owning five bank shares is more diversified than owning one bank, but the portfolio remains concentrated in one industry and one country.
The example is deliberately simplified. Real decisions may require product documents, current fees, tax information and guidance from an appropriately authorised professional.
Why this matters over time
It reduces avoidable concentration risk, although it cannot eliminate market losses. A single decision may feel small, but repeated choices shape cash flow, risk exposure and future flexibility. The goal is not to optimise every rand perfectly; it is to avoid preventable mistakes and make improvements that can be sustained.
Before acting, distinguish facts from assumptions. Facts can be checked today. Assumptions are estimates about income, prices, returns, behaviour or future events. A responsible plan makes both visible.
Common mistakes
- Counting the number of products instead of underlying exposures.
- Believing diversification prevents all losses.
- Overcomplicating a small portfolio.
Practical activity
Map a hypothetical portfolio by company, sector, country and asset class. Identify the largest hidden concentration.
Reflection: What did you assume? What information would change your conclusion? What is one small action you can complete this week?
Key terms
- Concentration Risk
- Excessive dependence on one exposure.
- Correlation
- The tendency of investments to move together.
- Asset Class
- A broad category such as shares, bonds or cash.
Lesson recap
Diversification spreads exposure across different investments so one failure has less influence on the whole portfolio. Use the step-by-step method, keep essential needs protected, and do not treat an educational example as a promise or personalised recommendation.
Check your understanding
Answer all six questions. Explanations appear after grading, so use mistakes as part of the learning process.
1. Which statement best captures the main concept in this lesson?
2. Which action is the strongest starting point?
3. Which behaviour is a common mistake discussed in the lesson?
4. What does “concentration risk” mean in this lesson?
5. Which statement is the most responsible?
6. What should a student do after completing the practical activity?
Mark it complete after reviewing the assessment explanations.