Economy of scale
Also written Economy of scale (mutual funds) · Economies of scale in mutual funds
The lower per-unit transaction cost a mutual fund achieves by buying and selling large amounts of securities at once, compared with what an individual investor would pay for the same trades alone.
In plain language
Buying in bulk is usually cheaper per unit. A mutual fund is built to use exactly that fact.
A fund pools money from thousands of investors. It then buys and sells large amounts of securities in single, large trades. A big trade costs less per rupee than a small one. So the cost per rupee invested is lower than what any one investor could get alone, buying the same securities in small quantities.
The booklet lists this as one of the salient features of a mutual fund. The others are professional management, diversification, liquidity, simplicity and tax benefits. Each is a separate reason a small investor might prefer a mutual fund to buying securities directly.
How it works
The booklet's own line: "A mutual fund buys and sells large amount of securities at one go. This makes its transaction cost lower than what an individual would pay for securities transactions." That lower transaction cost is shared across every unit holder in the scheme, in proportion to their holding.
Economy of scale sits alongside the other salient features the booklet lists for a mutual fund: professional management by fund managers with proven expertise, diversification across schemes and companies, liquidity through sale or redemption of units, simplicity with a small minimum investment, and category-specific tax benefits.
A worked example
Suppose buying shares directly through a broker costs an investor 0.5% of the transaction value in brokerage and charges, regardless of the trade size, because small trades still attract minimum charges.
An individual investing Rs 10,000 directly might effectively pay Rs 50 or more in costs on that single small trade, once minimum brokerage and other charges are accounted for. A mutual fund pooling Rs 50 crore from thousands of investors and executing one large block trade can negotiate materially lower rates per rupee traded, because the transaction size itself brings the cost down — and that saving is passed through, in proportion, to every unit holder, including the one who only put in Rs 10,000.
The Rs 10,000 investor could never negotiate the block-trade rate alone; pooled with thousands of others inside the fund, their money effectively does.
Why NISM asks about it
Chapter 5 (Investment in Securities Market) lists economy of scale under the "Salient features of mutual funds" in the section introducing mutual funds, alongside professional management, diversification, liquidity, simplicity and tax benefits. Expect a matching question pairing each salient feature with its correct description.
Common exam traps
- Economy of scale is about transaction cost, not about returns or risk. Do not confuse it with diversification, which is about spreading risk, even though both are listed together as mutual fund features.
- The benefit comes from the size of the pooled transaction, not from the fund manager's skill — professional management is a separate, distinct feature in the same list.
- The booklet does not give a specific percentage figure for how much cost economy of scale saves — only that the transaction cost is lower than an individual would pay alone.