Blue bonds, a form of debt that allows investors to fund water conservation efforts, are on the brink of a major breakthrough, with the market size set to expand significantly. This development could have a significant impact on the sustainable finance sector.

Matt Lawton, a portfolio manager at T Rowe Price, likened the current state of the blue bond market to that of the green bond market a decade or so ago. He said, “I would liken the blue bond market today to where the green bond market was 10 to 15 years ago.”

The green bond market is now valued at around $2 trillion, and Lawton believes that the blue bond market is on the verge of a similar transformation.

Lawton’s firm is working on launching the first blue bond strategy and is seeking commitments from investors for a fund that will make investments in this space. The International Finance Corporation, a member of the World Bank Group, is also involved in this initiative.

Blue bonds can be used to finance a range of projects, from marine conservation to plastic pollution cleanup. Lawton highlighted the strong economic argument for investing in these bonds, particularly in sectors like water sanitation.

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Despite the recent criticism of ESG investing, blue bonds have largely avoided this backlash due to their under-invested nature and financial appeal. The market is also gaining traction in the Asia-Pacific region, with the issuance of blue bonds doubling to $1 billion since 2020.

“I give The Nature Conservancy a lot of credit because they created a blue bond program a few years ago that I think really kicked up a lot of interest in the space,” said Preeti Bhattacharji, JPMorgan’s head of sustainable investing.

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