What it means
Some funds, known as funds of funds, build their portfolio by buying shares in other funds instead of buying stocks and bonds directly. That can be useful for diversification, but it can also stack up fees, because the investor pays the top fund's charges and the underlying funds' charges as well.
Section 12(d)(1) of the Investment Company Act of 1940 sets limits to control this. The core limits are three numbers.
A fund may not own more than 3% of the voting shares of another fund, may not put more than 5% of its own assets into any single fund, and may not put more than 10% of its own assets into funds overall. Together they are known as the 3-5-10 rule.
The rule protects investors in two ways. It stops a big fund from taking control of a smaller one, and it prevents a fund from handing most of its money to other managers while still charging its own fee.
Regulators were concerned about pyramids of funds in which nobody was accountable for the whole structure. Over the years the SEC has allowed many exceptions, for example for funds of funds from the same fund family, money market funds, and arrangements meeting detailed conditions.
A rule adopted in recent years, Rule 12d1-4, now sets out a common framework for funds of funds with conditions on fees, voting and disclosure. Which route applies depends on how the fund is structured.
For a business reader, this limit matters when you assess a pooled investment such as a target-date fund or a multi-manager portfolio. It helps explain why such funds are built in particular ways, and why fee disclosures need to be read carefully.
A lawyer or compliance officer will check which exemption or limit applies before any purchase.
In practice
Real-world examples.
Example
A mutual fund with $400,000,000 in assets wants to put $30,000,000 into another fund. The 5% asset limit is $20,000,000, so the purchase breaches the rule. The manager cuts the order to $20,000,000 or seeks an exemption.
Example
A fund-of-funds provider builds a retirement portfolio that holds twelve underlying funds. The total in all funds is limited to 10% of its assets unless a special exemption applies. The provider therefore relies on a specific exemption designed for funds of funds.
Example
A small investment trust with $50,000,000 in assets holds 4% of the voting shares of another fund. This is above the 3% ownership cap. The trust's compliance officer arranges a sale of the excess shares within the required period.
Formula
Calculation
Maximum in one fund = lesser of (5% x acquiring fund assets) and (3% x acquired fund voting shares value); maximum in all funds = 10% x acquiring fund assets
An acquiring fund has $200,000,000 in assets and wants to buy shares in a smaller fund worth $500,000,000. The 5% asset limit is 0.05 x $200,000,000 = $10,000,000. The 3% ownership limit is 0.03 x $500,000,000 = $15,000,000. The binding limit is the lower figure, $10,000,000, and total holdings across all funds cannot exceed 0.10 x $200,000,000 = $20,000,000.Case study
Seen in the real world.
Pinecrest Asset Management is a fictional firm that launched a growth fund with $300,000,000 in assets. The portfolio manager, Elena, liked the performance of a specialist technology fund and wanted to allocate $25,000,000 to it.
The compliance team checked the 5% asset limit, which was $15,000,000, and found that the purchase was too large. They also checked the 3% limit on the specialist fund's voting shares, and concluded that Elena could invest $15,000,000 within the rules, or seek an exemption for more. This is an illustrative story, but it shows how the limits operate. Elena invested the permitted amount and used direct holdings for the remainder.
Watch out
Common mistakes.
- Thinking the 3-5-10 rule applies to a person's own investing. It applies to investment companies (funds) buying other funds, not to individuals.
- Assuming the limits can never be exceeded. Many exemptions exist, including for funds of funds and some arrangements within the same fund family.
- Ignoring the extra layer of fees. Even when the rule is satisfied, the investor may still pay two sets of charges.
Questions
People also ask.
What is the 3-5-10 rule?
It limits a fund to owning no more than 3% of another fund's voting shares, investing no more than 5% of its assets in one fund and no more than 10% in all funds combined.
Which law contains the limit?
It is in Section 12(d)(1) of the Investment Company Act of 1940, which regulates mutual funds and similar vehicles in the United States.
Why does the rule exist?
It aims to prevent control of one fund by another and to limit duplicated fees and unclear fund structures.
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