Portfolio management
⏱ ~3-min readAceMark Guide
What this topic is really about
Modern Portfolio Theory demonstrates that an investor can construct an optimal portfolio by diversifying assets to maximize returns for a given level of risk. In contrast, focusing on picking a single best stock ignores the risk-reduction benefits of diversification and exposes the investor to unnecessary unsystematic risk.
CAPM assumes that diversifiable risk can be eliminated, meaning investors are only compensated for systematic risk, which is measured by beta. In contrast, total risk includes unsystematic risk, which is ignored by CAPM because it can be diversified away.
See the mechanism
Modern Portfolio Theory demonstrates that an investor can construct an optimal portfolio by diversifying assets to maximize returns for a given level of risk. A diagram for this topic isn't available yet — the worked example below walks the same reasoning step by step.
An exam-style question, fully explained
Modern Portfolio Theory emphasises:
- Identify what the question tests: Modern Portfolio Theory emphasises:.
- Modern Portfolio Theory demonstrates that an investor can construct an optimal portfolio by diversifying assets to maximize returns for a given level of risk.
- In contrast, focusing on picking a single best stock ignores the risk-reduction benefits of diversification and exposes the investor to unnecessary unsystematic risk.
Traps the examiner sets
- Read each option carefully — distractors on Portfolio management are designed to look plausible.
- Re-check the exact wording of the question stem before committing to an answer.
- Watch the qualifiers ("always", "only", "except") that flip a correct-looking option.
Test your recall
Answer each from memory — you'll see instantly whether you're right and why.
Run a focused 10-question mini-mock on Portfolio management and see it stick.
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