2020 was a relatively slow year for what had been a booming CLO market, with the initial stages of the pandemic resulting in a short-term dip in perceived corporate debt value and a reluctance of investors to deploy capital ahead of the implementation of state-led recovery packages. 2021 has been starkly different, with issuance volumes in the European CLO market set to potentially match or exceed those achieved in 2018 and 2019.1 Whilst the market flourishes, behind the scenes market participants have had to grapple with an ever-evolving regulatory environment. In particular, sell-side market participants must determine how to adapt and evolve to achieve the best overall results for their investors across the capital structure, many of whom are placing increased emphasis on more sustainable investment strategies. A few of the key current topics are considered herein.