Contrast gross with net, pre-tax with after-tax, and real with nominal returns
The idea
A return figure means nothing until it is clear what has been deducted. Gross return is before management fees and costs; net return is after them. Pre-tax and after-tax differ by the investor's own tax position, so the same fund produces different after-tax returns for different holders. Nominal return is the headline figure and real return subtracts inflation, which is what determines whether purchasing power rose. Leveraged returns magnify whatever the underlying return was, in both directions. Comparisons are only meaningful between figures on the same basis.
Formulas
Real return from a nominal return
(1 + nominal) ÷ (1 + inflation) − 1
- nominal
- the return as reported
- inflation
- the inflation rate over the same period
Subtracting inflation from the nominal return is the quick approximation, and it drifts as either figure gets large.
A practice question
What distinguishes a net return from a gross return?
- Net is after management fees and expenses — correct
- Net is before tax and gross is afterWhy not: Reversed, and about the wrong deduction: this distinction concerns fees and expenses. Tax is a further, separate step.
- Net excludes dividendsWhy not: Income is part of the return in both cases. What net subtracts is the cost of running the portfolio.
Gross return is what the portfolio earned; net return is what the investor kept after the costs of running it. The gap compounds over time and is often the largest single determinant of long-run outcomes.
A harder one
A portfolio returns 7% while inflation runs at 3%. What is the approximate real return?
- 10%Why not: 7 + 3 — inflation added instead of removed. Rising prices erode a return; they do not add to it.
- 4% — correct
- 2.33%Why not: 7 ÷ 3 — divided rather than subtracted. The exact calculation is (1.07 ÷ 1.03) − 1 = 3.88%, which the 7 − 3 approximation puts at about 4%.
Subtracting inflation gives roughly 4%; the exact figure is (1.07 ÷ 1.03) − 1 = 3.88%. The real return is what determines whether purchasing power actually increased.
The hardest tier
Why can the same fund report a different after-tax return for two investors?
- Because the fund charges different fees to different clientsWhy not: That would change the *net* return, a different distinction. The question is about tax, which the fund does not set.
- Because gross returns vary by account sizeWhy not: The gross return is the portfolio's performance and is the same for every holder of the same units.
- Because tax depends on each investor's own rate, domicile and account type — correct
The pre-tax return is a property of the fund; the after-tax return is a property of the investor. A tax-exempt account and a top-rate taxpayer keep very different fractions of the same performance.
In the app: 9 practice questions on this outcome, a narrated walkthrough with diagrams, spaced review that brings it back before you forget it.
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