ETNs, ETCs and the ETP Taxonomy

The taxonomy

Two refinements matter before treating the acronym as a verdict. First, not every ETN is naked credit: some, particularly in Europe, are themselves collateralised — the issuer pledges assets for noteholders, which moves them close to ETCs in failure terms. The prospectus, not the three letters, states which kind you hold. Second, ETNs differ in market structure: some are quoted essentially by a single dealer, often the issuer’s own desk, while others run an open architecture with several independent market makers and authorised participants. The open kind tends to price tighter and more reliably; the single-dealer kind lives and dies with one firm’s willingness to quote — a liquidity risk the factsheet never names, and a second reason the documents matter more than the label.

Two properties fall out of that table and explain most of what follows.

ETNs track perfectly and can default. Because the issuer simply promises the index return, there is no tracking difference in the ETF sense: no sampling error, no dividend leakage, no rebalancing cost. That precision is genuinely attractive, and it is purchased with credit risk.

ETCs try to have both. The debt wrapper solves the diversification problem (a single-commodity fund is not permissible under UCITS, Chapter 23), while collateral, allocated metal in a vault, or a securities pool, removes most of the credit exposure.

ETNs: the case for and the case against

The case for. Some exposures are genuinely difficult or impossible to hold in a fund: certain volatility strategies, some commodity indices with awkward roll mechanics, exposures in restricted markets, and leveraged structures beyond what fund rules allow. An ETN delivers them cleanly, with exact index tracking, and (in the US) historically with favourable tax treatment for some structures. For an institution comfortable pricing bank credit, that is a reasonable trade.

The case against. You hold a senior unsecured claim on a bank while believing you hold an index. Three failure modes have all occurred in practice:

• Issuer default. Lehman Brothers' three ETNs became near-worthless claims in 2008. The underlying indices were fine; the promise was not.
• Issuance suspension. An issuer can stop creating new notes, which breaks the arbitrage mechanism (Chapter 31 has no equivalent here: creation is at the issuer's discretion). The note can then trade at a large, persistent premium to its indicative value, and buyers at that premium lose it when issuance resumes. This has happened repeatedly, notably in oil and volatility products.
• Early redemption and acceleration. Most ETN prospectuses grant the issuer the right to call the notes, sometimes on short notice. Your position can be terminated at a value you did not choose, in conditions you did not like.

There is also a quieter issue: an ETN's "fee" can include financing and adjustment terms buried in the pricing supplement, which are less transparent than a fund's TER.

ETCs: the useful middle

The European commodity market runs on ETCs, and they are structurally much stronger than ETNs:

• Physically-backed metal ETCs hold allocated, numbered bars at a custodian, pledged to holders, with bar lists published. Economically close to a fund with a different legal costume (Chapter 23).
• Synthetic ETCs track commodity indices through swaps with collateral pools under UCITS-style eligibility and haircut rules (Chapter 38's machinery).
• Bankruptcy remoteness through special-purpose vehicles means the issuer's other business does not reach your collateral.

The residual risks are real but bounded: collateral quality, custodian operational risk, and, for synthetic versions, the swap counterparty. Read the collateral disclosure exactly as in Chapter 38, and the structure is defensible.

How to tell what you are holding, in twenty seconds

The label is often ambiguous; the documents are not.

1. Read the full legal name. "ETF" in the name usually means a fund; "ETN," "ETC," "Note," "Certificate" or "Zertifikat" means debt.
2. Check the KID or prospectus header: it will state the product type and, for notes, name the issuer and describe the credit risk in the risk section.
3. Look for a UCITS designation (Europe): UCITS means fund, with segregation.
4. Look for collateral language: "physically backed, allocated," "secured," and a named custodian indicate an ETC rather than a plain note.
5. In doubt, ask the question directly: if the issuer failed tomorrow, what do I own? Every product's documents answer it, and the answer is the product's real risk profile.

A worked example

Three products, all tracking gold, all trading on European exchanges under similar names.

• Product A: a physically-backed ETC, allocated bars at a London custodian, bar list published daily, TER 0.12%, bankruptcy-remote SPV. Risk: custodian operations, negligible credit exposure.
• Product B: a synthetic ETC, swap-based, collateral pool of G10 government bonds at published haircuts, TER 0.19%. Risk: collateralised counterparty exposure, reset frequently.
• Product C: an unsecured ETN from a mid-tier bank, TER 0.09%, exact tracking, with an issuer call provision at 30 days' notice. Risk: the bank.

The cheapest product on the fee line carries a risk the other two have largely engineered away, and the fee difference, 3 to 10 basis points, is a rounding error against the scenario it exposes you to. This is the clearest illustration in the book of why structure must be read before cost.