Formula Funds: Definition, How They Work, Benefits, and Risks

The formula fund is one of the oldest financial investments in the structured products family. Long offered by French banks as a way to boost savings within a regulated framework, it remains an option worth considering for any investor looking to diversify their portfolio. This guide explains exactly what a formula fund is, how it works, its advantages, its risks, and possible alternatives.

What is a formula fund?

A formula fund is a mutual fund (FCP) or SICAV whose performance is calculated according to a predefined formula, established at the time of its launch and valid until its maturity. This formula is based on the performance of one or more underlying indices, stocks, or baskets of securities over a specified period, generally between 5 and 8 years.

Unlike an actively managed fund, where the manager constantly adjusts the portfolio’s composition, a formula fund operates according to fixed rules: the final return depends solely on the mechanical application of the formula to the actual performance of the financial markets over the investment period.

Difference Between Formula Funds and Other Structured Products

Formula funds and structured products are based on the same principle: a return determined by a formula linked to an underlying asset over a fixed term. The main difference between them lies in their legal structure.

• A formula fund is a collective investment scheme (CIS)—either a FCP or a SICAV—governed by investment fund law, with a custodian that is separate from the manager.
• A traditional structured product (EMTN) is a bond issued directly by the issuing bank: the investor therefore bears a direct credit risk with respect to that issuer, which is not the case with a formula fund, whose assets are segregated.

This legal distinction has a significant practical impact on the level of counterparty risk borne by the investor, which should be carefully verified before comparing two offers.

How does the return formula work?

The calculation formula for a formula fund precisely defines:

1. The reference underlying asset: a stock index (CAC 40, Euro Stoxx 50, etc.), a basket of stocks, or a combination of several indices.
2. The initial level recorded at the fund's launch.
3. The reporting dates—often annual—at which performance is measured.
4. The mechanism for calculating returns: a percentage of the index’s increase, a cap on returns, a memory effect, or a fixed coupon contingent on a performance threshold.
5. The level of capital protection at maturity, which is either guaranteed or contingent upon the underlying asset not falling below a maximum threshold.

The Benefits of Formula Funds

This type of investment offers several advantages that explain its enduring popularity among high-net-worth investors:

• Return potential is clear from the moment of subscription: the potential gains and losses are detailed in the formula, unlike with a traditional equity fund.
• Capital protection—either full or partial, depending on the fund—that limits exposure to moderate declines in the financial markets.
• Diversification of the underlying asset, which is often based on a broad index rather than a single stock, thereby reducing specific risk.
• Passive management with no arbitrage fees during the fund's term, since the structure does not require active intervention by the portfolio manager.
• Compatibility with unit-linked life insurance, allowing you to take advantage of the favorable tax treatment of this asset class.

Risks and Drawbacks You Should Be Aware Of

A balanced view of formula funds also requires considering their limitations:

• A risk of capital loss beyond the protection barrier defined in the formula in the event of a sharp decline in the underlying asset.
• A fixed investment term: Exiting before maturity (or before an early redemption) generally results in a discount, as the fund is not designed to be continuously liquid.
• Complex to understand: The calculation formula, its thresholds, and its rollover mechanisms require a careful reading of the prospectus.
• Fees that are sometimes not immediately apparent, as they are factored into the structure of the plan rather than listed separately (management fees, structuring fees).
• A capped return in certain cases: once the index reaches a certain performance level, the investor's gain may be limited, even if the market continues to rise.

What is the recommended investment horizon?

The term of a formula fund is set at the time of its launch, generally between 5 and 8 years, with annual valuation dates that allow for early redemption. It is recommended that you invest only funds that you will not need before the fund’s maturity, since early redemption may result in a loss of value relative to the initial principal invested, regardless of the underlying asset’s final performance.

What fees are associated with formula funds?

The fees for a formula fund generally consist of:

• entry fees, charged at the time of subscription, which may be negotiable depending on the distributor;
• annual management fees, which are often factored directly into the formula used to calculate returns, making them less visible than a standard stated percentage;
• structuring fees, related to the creation of the derivative underlying the formula;
• fees related to the investment portfolio, if the fund is held within a life insurance policy (policy management fees).

Are there any alternatives to formula funds?

There are several alternatives that can help you achieve similar financial goals, each with different risk profiles:

• Euro-denominated life insurance funds offer maximum capital protection, but at the cost of generally lower returns.
• ETFs (index funds) offer a simple and low-cost way to gain exposure to the stock markets, with no capital protection or cap on gains.
• Corporate or government bonds, for a steady return with a generally more predictable risk profile.
• Customized structured products (EMTNs), which allow for greater customization of the underlying asset and thresholds, in exchange for direct credit risk on the issuer.
• Diversified unit-of-account life insurance policies, actively managed, to entrust investment decisions to a professional.

How do you choose a formula fund that suits your profile?

1. Assess your risk tolerance: a capital-guaranteed fund is suitable for conservative investors, while a conditionally capital-protected fund is suitable for balanced to aggressive investors.
2. Check the underlying asset: A broad, diversified index limits specific risk compared to a limited basket of stocks.
3. Analyze the protective barrier and the performance scenarios presented in the DIC for the three scenarios (favorable, median, and unfavorable).
4. Compare several offers before committing, paying particular attention to fees and the financial strength of the issuer or manager.
5. Incorporate the investment horizon into your overall savings strategy by investing only funds that are available for the long term.

In summary

Formula funds remain a useful tool for diversifying a savings strategy, provided you fully understand how they work. Their calculation formula—which is disclosed at the time of purchase—offers rare transparency regarding potential gains and losses, but also involves fixed terms and a level of complexity that requires a careful reading of the prospectus. When chosen wisely—in line with one’s risk profile and investment horizon—it can serve as a valuable addition to a life insurance policy or a securities account.