The Rise of the Sustainable Debt Market

Debt instruments geared toward sustainability outcomes are increasing in prominence within global fixed income markets. These securities are similar in terms of risk and return to conventional fixed income but differ in terms of purpose and use of proceeds. As interest rates have risen, they have begun to offer investors an alternative to generate stable, defensive income – while financing projects with environmental and social benefits.

Alphabet soup

While terminology can be confusing, there are broadly two main types of sustainable debt instruments:

• Use-of-proceed bonds. This is debt that is used to fund projects with specific environmental and/or social benefits. This includes ‘Green’, ‘Social’ and ‘Sustainability’ bonds. Common ‘Green’ financing may include renewable energy development, energy efficiency upgrades and electric vehicle rollouts. Common ‘Social’ financing areas may include access to affordable housing, essential services, or improved food security. ‘Sustainability’ bonds may finance a combination of these activities or target projects with co-benefits.
• Sustainability-linked loans or bonds. These are pay-for-success instruments where the proceeds are not earmarked for specific projects, but the issuer commits to meeting
  predefined performance indicators within a specific timeframe. For example, reducing overall greenhouse gas emissions or improving diversity outcomes at a corporate
  level. Depending on the structure, the issuer may face a penalty for failing to meet a target, such as an increase in interest payable.

Chart 1: Australian dollar sustainable debt issuances (2014 – 2024 YTD [May]) by type (AUD billion / market share)

The state of play

Since its inception, the sustainable debt market has grown exponentially. As at the end of 2023, the market stood at over US$4.9 trillion globally. In only a decade, annual issuance has increased by a factor of more than 100x.

In Australia, this same market has now grown to over $100 billion of issuances, with governments, semi-governments and corporations actively participating. This number is only expected to grow given the financing needs for sustainability objectives. For instance, to achieve Australia’s 2030 targets, renewable energy projects alone are estimated to need $80 billion of capital expenditure. Debt is anticipated to provide 50-70% of this finance.

Chart 2: Australian dollar sustainable debt issuances by year (AUD billion)

Reading more than just the label

The sustainable debt market has both potential and pitfalls. The act of ’greenwashing’, or issuers misrepresenting the benefits of bond proceeds, remains an ongoing challenge. The criteria for issuing bonds remains broad and varies across markets, despite some improvements in frameworks. For example, global meat producer JBS faced significant criticism for its US$3.2 billion 2021 sustainability-linked bond issuance due to questionable emissions claims and calculation methods. Moreover, the sustainable bond market still represents only a fraction of the overall fixed income market. Therefore, there are risks related to liquidity and concentration in certain issuers, sectors or regions. To address
this, investors should adopt a sophisticated approach via specialist managers or those with skills to actively manage portfolio risk.