Concentration risk: when a catalogue is really one song

A catalogue is often sold, and bought, as a diversified stream of income. Hundreds of titles, decades of releases, a spread of writers and genres. The pitch is resilience: no single song can make or break the numbers. In practice, that resilience is frequently an illusion. Pull apart the royalty statements of many mid-sized catalogues and a familiar pattern emerges: one track, sometimes two, generating the majority of net publisher's share or artist royalties, with the rest of the catalogue contributing a long, thin tail. This is catalogue concentration risk, and it is the single most under-examined variable in music rights valuation.

The reason it goes unexamined is structural. Aggregate revenue figures are easy to produce and easy to present. A track-by-track breakdown is harder to compile, harder to model, and less flattering to the seller. Advisers who do not insist on it are relying on the headline number rather than the income architecture underneath it. That is precisely the gap between value and noise that a buyer, or a lender, cannot afford to ignore.

Why concentration changes the risk profile

A catalogue earning most of its income from one composition is not a portfolio in any meaningful sense. It is a bet on the durability of that composition's demand: continued sync placements, radio and streaming persistence, cover versions, and the absence of any dispute over authorship or ownership. Portfolios diversify away idiosyncratic risk. A single dominant asset does not. If that track loses a sync licence, drops out of key playlists, or becomes entangled in a co-writer or publishing dispute, the cash flow supporting the entire acquisition can move sharply, and the rest of the catalogue will not compensate for it.

This matters more, not less, when the concentrated track is a proven, well-known hit. Familiarity breeds a kind of analytical laziness: a recognisable song feels safe because it is well known, not because its future income has been tested. Underwriting a catalogue on the strength of brand recognition, rather than on the shape of its royalty distribution, is how concentration risk gets waved through due diligence.

What proper diligence looks for

Sound underwriting starts by asking what share of net income comes from the top one, three and ten tracks, over a multi-year window rather than a single peak year. It asks whether that concentration is growing or shrinking, and why. It checks whether the top earner's income is contractually secure, particularly around synchronisation, or dependent on renewable licences and platform placement that could lapse. And it asks the ownership question directly: is title to the dominant asset clean, fully documented, and free of competing claims, because a dispute over the one song that matters is a very different exposure to a dispute over one of two hundred.

None of this is a reason to avoid concentrated catalogues. Some of the most durable income in music comes from a small number of enduring copyrights, and a lender or investor who understands the concentration can price it accordingly, structure covenants around it, or simply pay less for the uncertainty. What is not defensible is pricing a concentrated catalogue as though it were a diversified one, because the marketing materials called it a catalogue.

The word catalogue implies breadth. The cash flow statement tells you whether that breadth is real, or whether you are, in substance, buying one song with company.