Investment certificates: what they are, how they work, and the risks banks don't explain

The certificate that pays 8% and also protects your capital

When a bank calls to offer you a “capital-protected certificate” yielding 7.5% per year, something should immediately not add up. A product that is both safe and paying three times the yield of a five-year government bond cannot exist on those terms, or it exists but at a price the caller has not yet mentioned.

That instinct is the best analytical tool available. Investment certificates are among the most aggressively sold financial products by Italian banks in 2026, often to retail clients who do not fully understand their structure. This article explains what they are, how they work, what they actually cost, and when, if ever, buying one makes sense.

What investment certificates are

An investment certificate is a structured debt security issued by a bank (or a specialised subsidiary such as Mediobanca Certificates, BNP Paribas Issuance, or Société Générale). As a debt security, the buyer becomes an unsecured creditor of the issuer: if the bank fails, the certificate is not protected by deposit guarantee schemes, unlike a current account or a savings deposit.

Financially, a certificate combines two building blocks:

1. A bond component: the issuer promises to repay the capital (in full or partially) at maturity, similar to an ordinary bond.
2. One or more options: these derivatives define the additional return and the conditions of capital protection, linking the final payoff to the performance of an underlying asset (an index, a share, a basket of securities).

The resulting product can appear simple on the surface (“capital protection plus a 6% annual coupon”), but the internal mechanics are anything but. And those mechanics are precisely where the bank embeds its margin.

The main types of certificates

Not all certificates work the same way. The differences are not marginal: they determine when and how much you can lose.

The type most commonly sold to retail investors in Italy in 2026 is the conditional capital protection certificate, often presented as “nearly safe” because barriers are set deep (60–70% of initial value). That apparent safety is the core of the problem, as the next section shows.

The hidden cost: how the bank profits

Mutual funds display a TER in standardised documents. ETFs publish tracking difference data. Certificates have neither: the bank’s margin is embedded in the initial price and appears nowhere in the marketing material.

The mechanics: the issuer constructs the product by buying the two components on the wholesale market (its own bond plus options), then sells the finished product to the client at a higher price. The difference is the margin, which in practice typically falls between 2% and 5% of the notional at issuance.

A concrete example: a five-year capital-protected certificate on the Euro Stoxx 50 might be structured as follows:

• The issuer funds itself by issuing its own bonds at 3.2% per year
• It buys call options on the Euro Stoxx 50 at an equivalent cost of 1.5% per year
• The total cost of the structure is approximately 4.7% per year
• The certificate is sold as if the upside participation were “free”

The implicit cost of 4.7% per year is not visible separately. It manifests as lower participation in the underlying’s upside compared to what would be achievable by purchasing bonds and options directly. For a retail investor, replicating this structure independently is not practical. But understanding that the cost exists, and that it is significant, is essential before buying.

Barrier risk: when protection vanishes

The conditional capital protection certificate is the most insidious case because protection holds in most market environments but disappears in the worst ones.

Concrete example: a certificate with a 60% barrier on a basket of European bank shares.

• Normal scenario: after four years, European bank shares are worth 85% of the initial value. The 60% barrier has not been breached. The investor receives 100% of capital plus the accumulated periodic coupons. Apparent success.
• Crisis scenario: after two years of sideways movement, a banking crisis erupts and the basket falls to 55% of initial value within months. The barrier is breached. The certificate no longer repays 100% of capital: it now tracks the underlying’s performance. The investor receives 55% of the invested capital, a 45% loss.

The structure is therefore asymmetric in the worst possible way: it works in normal markets (where an ordinary bond would have sufficed) and fails exactly when the investor most needed protection.

The probability of breaching a 60% barrier may seem low looking at recent market history. But global equity markets have lost 35–55% of their value on multiple occasions in the past 25 years (dot-com collapse, 2008 financial crisis, March 2020). Investors with multi-year horizons who buy barrier certificates during low-volatility periods are taking on risks that product marketing tends to minimise.

The tax advantage: real but overrated

Banks frequently emphasise a tax advantage of certificates that is genuinely present. Gains from certificates are classified as redditi diversi in Italy, the same category as capital gains from equities and bonds. This means they can offset capital losses accumulated in the fiscal carryforward basket (zainetto fiscale), which in Italy includes losses from ETFs as well.

For an investor with losses to recover (for example after selling ETFs at a loss), a certificate that generates gains can be a tax-efficient tool for clearing those losses before the four-year window expires. This is a real benefit.

The problem is proportionality. An implicit margin of 3–5% on a certificate is a high cost to pay for a tax advantage worth, in economic terms, 26% of the losses to offset. For every 10,000 euros of losses to recover, the maximum tax saving is 2,600 euros. If achieving this requires paying a 4% implicit margin on a 50,000-euro investment (2,000 euros of cost), the arithmetic barely works. For smaller loss amounts or lower notionals, the tax advantage does not justify the cost.

Liquidity: a market controlled by the bank

ETFs trade on Borsa Italiana with bid-ask spreads typically in the range of 0.05–0.15% for major products. An investor who wants to exit an MSCI World ETF at noon on a Thursday does so in seconds at the prevailing market price.

Certificates have a secondary market on the SeDeX exchange, but it is dominated by the issuer acting as the sole market maker. Selling before maturity involves two problems:

1. The bid-ask spread is much wider than for ETFs, typically 1–3% of the nominal value.
2. The repurchase price is set by the issuer using internal models, and in practice it almost always falls below the theoretical fair value based on market prices for the embedded options.

During periods of market stress, when multiple investors want to exit simultaneously, liquidity can deteriorate further. An investor who needs to liquidate a certificate a month before maturity to cover an unexpected expense may find themselves selling at 92–94% of theoretical value, a cost that was invisible at the time of purchase.

Certificates vs bonds plus ETFs: the practical comparison

Most certificates replicate an exposure that could be built independently by combining simpler instruments. The relevant comparison is not between the certificate and a single alternative, but between the certificate and a functionally equivalent combination.

The bond-plus-ETF combination is inferior to certificates only on the loss offset front. On every other dimension, it is structurally better.

When a certificate can make sense

With all of the above in mind, there are cases where buying a certificate is a rational choice.

Recovering significant capital losses. If you have 20,000–30,000 euros of losses in the fiscal carryforward basket to recover before year-end, certificates can be the most efficient tool to do so, provided you select products with liquid underlyings, deep barriers, and strong issuers.

Investors who do not want to manage bonds and equities separately. A simple certificate offers a pre-defined risk/return structure in a single instrument, with no ongoing maintenance. For investors who find managing a balanced portfolio independently too complex, the implicit cost may be an acceptable price for simplicity.

Very risk-averse profiles. A 100% capital-protected certificate on an equity index offers market exposure without the possibility of nominal loss (provided the issuer does not default). For investors who would not psychologically tolerate even a temporary fall in value, this structure has a rationale.

In all other cases, the combination of opaque costs, barrier risk, and limited liquidity makes certificates a product to evaluate with extreme care before purchasing.

Next step

Investment certificates are not products to avoid categorically. They are products to understand before buying. The difference between an investor who uses them deliberately to recover capital losses and one who buys them because a financial advisor presented them as “safe and high-yielding” is entirely a matter of understanding the structure.

With Wallible you can:

• Analyse your portfolio and check whether you already hold structured certificates and how they affect your overall allocation
• Read the article on ETF capital losses and the Italian fiscal carryforward basket to understand when tax recovery justifies instruments like certificates
• Explore ETF taxation in Italy to compare the tax treatment of certificates and index funds