In an article, the United Nations Environment Programme Finance Initiative argued that ocean biodiversity loss and marine ecosystem degradation are becoming financially material for banks and insurers and invited financial institutions to help design One Ocean Finance, a new initiative led by UN agencies and global partners. The proposed vehicle is intended to mobilize and redirect capital toward a sustainable, equitable and resilient ocean economy, with port infrastructure and shipping finance among the initial focus areas. The article sets out a three-horizon approach for the finance sector. In the near term, it points to emerging monitoring tools and existing datasets as inputs for pricing and risk assessment, and notes that slow steaming below 10 knots can reduce fuel consumption by up to 50 to 60 percent while lowering ship-strike risk. Over the medium term, it highlights the High Seas Treaty, climate-driven habitat shifts and rising legal and liability exposure as reasons to update governance frameworks and risk models. It also points to cumulative blue-labelled issuance of USD 5 billion in 2018 to 2021 versus USD 2.2 trillion of green issuance since 2006, and cites an estimated blue-themed investment opportunity of more than USD 3 trillion through 2050. UNEP FI invited financial institutions to take part in a survey on finance sector priorities and to join the co-design process for One Ocean Finance.