A significant disadvantage of mutual funds is the effect of fees and expenses on an investor’s net return . Mutual funds incur costs for portfolio management, administration, operating activities, and, depending on the fund and series, other applicable charges. These expenses are ultimately reflected in the investor’s investment performance; therefore, two funds generating similar gross investment returns can provide different net returns when their respective costs differ.
CIRO’s investor education material states directly: “These fees reduce the return you get on your investment in a mutual fund.” This makes A the correct answer.
The other choices describe generally beneficial features rather than disadvantages. Liquidity normally enables investors to redeem mutual fund units relatively conveniently. Diversification permits investors to obtain exposure to numerous securities and can reduce security-specific concentration risk. Professional management provides investors with portfolio-selection and monitoring expertise without requiring them to manage individual securities themselves.
The official CIRE syllabus specifically requires candidates to understand the “advantages and disadvantages of mutual funds” and “the impact of costs and charges.” It also addresses how fees, turnover, and taxes affect managed-product returns .
Study Guide Reference: CIRE Element 7 , particularly 7.9–7.10: Managed Products and Mutual Funds—advantages, disadvantages, pricing, costs and charges .