A professional holds separate accounts for safe and risky investments and thinks they need to...

Mental accounting occurs when an investor separates money or investments into distinct conceptual categories and evaluates each category independently rather than considering the investor’s overall economic position. In this scenario, the professional treats the safe account and risky account as separate decision units. The professional concludes that the risky account must independently become less risky, without recognizing that the safe account may already reduce the combined portfolio’s overall exposure. This compartmentalized analysis is the defining feature of mental accounting.

A proper portfolio assessment should examine the aggregate asset mix, correlations, concentration, liquidity and total risk across all relevant holdings. Evaluating accounts in isolation can cause unnecessary duplication, excessive conservatism in one account or unintended risk across the combined portfolio.

Herd mentality involves following the behaviour of other investors rather than making an independent assessment. Overconfidence involves overstating one’s knowledge, forecasting ability or control over outcomes. Loss aversion describes the tendency to experience the pain of losses more strongly than the benefit of equivalent gains. None of those biases explains the artificial separation of the investor’s safe and risky holdings.

Behavioural finance and mental accounting are expressly included in CIRO’s official Retail Securities practice materials and syllabus-based assessment framework.

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