SDG Bonds: Their Time Has Come

The emergence of bonds linked to sustainable development goals signals that fixed income markets have entered a new phase.

The bond market has seen a flurry of issuances whose proceeds are mapped to the SDGs, including green, social, and sustainability bonds, as well as a growing number of issuers embracing the SDGs in their strategies. PIMCO has championed the UN SDGs as a reference framework for sustainable debt issuance and issuers’ sustainability reporting.

A rising group of issuers in a broad range of sectors has also come to the market with sustainability-linked loans, which have incentives for borrowers to achieve sustainability performance objectives; these can include overall practices (such as B-Corp certification and human and labor rights audits), as well as output (e.g., low- carbon products and services) and outcomes (e.g., carbon emission reduction or waste recycling). Increasingly, these objectives are related to the UN SDGs.

As investors, we welcome such developments as positive steps.


We see two fixed income instruments in particular as key to advancing the SDG bond marketplace.

The first key structure, which is already established, is use-of- proceeds bonds, including green, social, and sustainability bonds. With these instruments, issuers commit to using the actual funds raised in the bond offering to achieve certain SDG objectives.

The second innovative way of integrating SDGs into the bond market is to include a covenant that links the coupon of a bond to the issuer’s achievement of climate and broader SDG goals. Essentially, progress or lack thereof toward the SDGs then results in a decrease or increase in the instrument’s coupon.

We think the emergence of such SDG-linked bonds may help further cement bondholders’ role in advancing SDG-related targets. Moreover, this SDG-linked approach opens up large potential opportunities: The proceeds are typically for “general corporate purposes” and may therefore be well-suited to issuers in sectors without large investment needs that are taking compelling steps to align their business models and strategies with the SDGs.

We think that use-of-proceeds bonds and SDG-linked instruments may be complementary and can coexist in harmony under the overarching framework of SDG-aligned bonds.

Looking ahead, we see the articulation of these two instruments and approaches as the next stage of development in the sustainable bond market. Specifically, we expect to see:

  1. More explicit integration of issuers’ climate and SDG strategies and profiles into the existing green, social, and sustainability bond standards.
  2. Progress on defining standards for SDG-linked bonds, based, for example, on SDG targets that are most material to the issuer’s business and investment strategy, as well as the most connected to its main externalities.
  3. Development of disclosure expectations for SDG-aligned bonds, including mapping of use-of-proceeds to specific SDGs and robust measurement of impact based on the SDG indicators.

Meanwhile, our expectation toward issuers of these bonds includes:
1) evidence of the alignment of the issuer’s business– which may include input (e.g., capex), output (e.g., business mix), and outcomes (e.g., carbon emissions) – with SDG-related targets (e.g., zero net carbon pathway, zero net deforestation, no net loss of biodiversity, and ecosystem services); 2) third-party oversight for the method, monitoring, and reporting of such targets, which could build on science-based targets for climate change, for example.

These exciting developments may soon allow fixed income investors to target thematic objectives, such as climate action, in a portfolio that emphasizes bonds linked to the relevant SDGs. Investing in the debt of companies demonstrating climate leadership by targeting SDG #13, climate action, is just one example of how SDG bonds may enable investors to have a role in financing the achievement of SDGs.


As SDG-aligned bonds have evolved, a missing link has persisted: Many issuers of green or social bonds are not articulating how their sustainability objectives for these bonds align with their broader corporate strategy.

This means, for example, that an issuer lacking a long-term plan to adapt to climate change and contribute positively to the Paris Agreement can issue a bond devoted to low-carbon sources of energy that concern a fraction of its total business and capex, and still claim that the bond warrants the “green” label.

Focusing on the Bloomberg Barclays MSCI Green Bond Index, we found that the majority of issuers have demonstrated some level of readiness to cope with climate risks, which means they have demonstrated awareness of climate change as a business risk in their public reporting and have taken steps to report and mitigate carbon emissions. However, a meaningful share of green bond issuers has not. Importantly, only a fraction of those that do show climate preparedness have also demonstrated best practices by reporting a long-term carbon emission reduction target connected with the Paris Agreement, as per the science-based method (see Figure 1).

SDG Bonds: Their Time Has Come

SDG Bonds: Their Time Has Come


To identify these inconsistencies and encourage best practices, we have analyzed many recent use-of-proceeds bonds and developed a framework to assess their suitability for PIMCO’s ESG-focused strategies. A key criterion in our analysis is the alignment between the objectives of use-of-proceeds bonds and the issuer’s broader sustainability strategy and targets. (See Figure 2.)

Bottom line: Sustainability debt markets have entered a new phase. Looking ahead, we think covenants can be introduced to provide incentives for issuers to connect their core business objectives and financing conditions with the UN sustainable development goals.

SDG Bonds: Their Time Has Come

To view our ESG fixed income strategies or keep reading our latest insights, please see PIMCO’s ESG Investing page.

The Author

Samuel Mary

ESG Research Analyst

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