A AAA rating sounds like the safest thing in finance. In a collateralised loan obligation, a CLO, it mostly is, but the protection is specific and bounded in ways the label doesn’t spell out. Three new ETFs tracking AAA CLO debt have arrived for European investors, all charging 0.25% a year. Before the fee comparison begins, it’s worth understanding what the rating is actually buying.
What a CLO actually is, and what AAA means inside one
A CLO is a fund that buys leveraged loans: the kind of debt issued to companies already carrying a lot of borrowing, typically rated below investment grade. The CLO bundles those loans together and then slices the resulting pool into layers, called tranches. Investors in the bottom tranche take the first losses if loans default. Investors in the top tranche, the AAA layer, get paid last in the queue for interest but take losses only when defaults in the underly ing pool are severe enough to wipe out every tranche beneath them.
That structural seniority is what the AAA label reflects. It doesn’t mean the underly ing loans are safe. Most of them aren’t: they’re the kind of debt that investment-grade bond funds won’t touch. What it means is that losses have to travel a long way up the waterfall before they reach you.
So what risks remain? Three are worth naming. First, liquidity risk: CLO tranches are not as liquid as government bonds or corporate bond ETFs, and in a stress event the ETF wrapper can trade at a discount to the underly ing assets. Second, spread risk: even AAA CLO notes carry a credit spread over government rates, and when spreads widen, as they do in downturns, the market price of the notes falls, even if no defaults occur. Third, manager discretion: unlike a passive index, a CLO’s loan book is actively managed by the CLO manager. The ETF’s AAA rating is, in part, a bet on that manager’s quality.
Active versus rules-based, and what 0.25% buys in each case
All three funds in this comparison charge the same annual fee (OCF): 0.25%. But the construction differs.
Janus Henderson USD AAA CLO Active Core and its EUR-hedged equivalent, Janus Henderson USD AAA CLO Active Core EUR-Hedged, are actively managed. That means the team at Janus Henderson is selecting which AAA CLO tranches to hold (choosing CLO managers, vintages, and structures) rather than replicating an index. At 0.25%, you’re getting active selection at a fee level usually associated with passive funds. The EUR-hedged share class is worth noting separately: hedging USD exposure back to euros costs something (it’s embedded in the hedge), and the effective return will track EUR interest-rate differentials rather than the raw dollar yield.
UBS EUR AAA CLO UCITS ETF operates in euros natively, removing the currency hedge question for EUR-based investors. The underly ing exposure is to European rather than US leveraged loans: a meaningful difference. European CLO markets are smaller and the loan universe less deep than in the US, which affects both liquidity and diversification. The asset class label in the data block, “Other” rather than “Bond”, is a fair signal that this sits slightly outside conventional fixed income buckets.
The 0.25% fee is the same across all three. The risks you’re accepting in exchange are not.
What to watch next
First, credit spreads. AAA CLO spreads have compressed sharply since 2022: the yield advantage over plain investment-grade bonds has narrowed. If spreads widen again, the price of these ETFs moves down even without any default event. That’s the most immediate market risk to track. Second, the underly ing CLO managers: because AAA protection depends on the subordinate tranches absorbing losses first, the quality of those tranches matters. A CLO managed with loose loan selection erodes the buffer that makes the AAA layer safe. Third, the currency hedge cost on the EUR-hedged Janus Henderson share class: when US rates are materially higher than eurozone rates, the hedge is expensive and the income pickup shrinks accordingly. Watch the rate differential as central banks move. That last point is probably the most underappreciated cost hiding behind an identical OCF line.
Past performance is not a guide to future returns. Capital is at risk.
Past performance is not a guide to future returns. Capital is at risk.
Funds Benchmark provides research and tooling for institutional and private investors. Nothing in this note is investment advice or a recommendation to buy or sell any specific fund.