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Independent, clear, and trusted — CLO Research Group provides actionable insights for CLO debt and equity investors.

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US BSL CLOs: New-Issue Arbitrage Trends (Updated)

Arbitrage in the first half of 2025 was healthy, supported by wider asset spreads and tighter liability prints. In the second half of 2025, however, it generally ranged between 144 and 156 bps. When volatility spiked in February 2026, arbitrage improved to levels seen in early 2025, although it subsequently narrowed again, with the latest readings in the range of 150–160 bps.

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US BSL CLOs: Diversification Benefits

In the US BSL CLO market, 12 and 27 managers offer average pairwise overlap levels of below 50% across their optimal five-deal and three-deal combinations, respectively. The table below presents the average pairwise overlap for these optimal combinations by manager.

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US BSL CLOs: Portfolio Overlap Optimisation Model

AAA/AA investors are always thinking about systemic risks, and one way to reduce this risk is to minimise overlap exposure within their portfolios. The beauty of this model is that users can choose from a pool of CLO deals managed by managers they favour and optimise the portfolio for the lowest possible overlap risk based on the target number of positions they are looking to hold. Please find the download link below for the overlap optimisation model, which allows users to select from a pool of US BSL CLO deals to be added to an existing portfolio, with the model identifying the optimal outcome from an overlap perspective.

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