Income with purpose

CPD Content

31 March 2026

The fixed income market is undergoing a structural evolution, as investors increasingly seek to align portfolio outcomes with broader social and environmental objectives. The rise of green and sustainable bonds is central to this shift, offering a way to maintain the traditional benefits of fixed income while incorporating purpose-driven investment outcomes.

Bill Bovingdon (Australian Ethical) and Nigel Douglas (Douglas Funds Management) discussed the opportunities which green bonds provide investors at IMAP Independent Thought Conference.

Fixed income has long played a foundational role in diversified portfolios, valued for its defensive characteristics—capital stability, liquidity, diversification, and reliable income generation. In the current macroeconomic environment, with policy rates in major economies settling around 3.5–4 per cent and inflation expected to remain somewhat persistent, bonds continue to offer a supportive backdrop for income-focused investors. Yield curves are likely to stay relatively steep, reinforcing the role of active management in capturing value across different maturities.

Against this backdrop, green and sustainable bonds have emerged as one of the most significant innovations in fixed income in recent decades. These instruments function similarly to traditional bonds but are differentiated by the explicit use of proceeds. Green bonds finance environmental projects, while sustainable bonds extend this mandate to include social outcomes such as affordable housing, healthcare, and community infrastructure. In both cases, capital is ring-fenced to ensure it is directed toward designated initiatives.

For investors, the appeal lies in achieving a dual outcome: competitive financial returns alongside measurable impact. Importantly, this is not a trade-off. Well-managed green and sustainable bond portfolios have demonstrated the ability to deliver returns comparable to, or in some cases exceeding, traditional fixed income investments. Over recent years, diversified portfolios in this segment have generated mid-single-digit returns, outperforming benchmarks through active management.

A key factor underpinning the growth of this market is the development of robust governance and accreditation frameworks. Industry standards, such as those established by the International Capital Market Association, alongside independent verification bodies like the Climate Bonds Initiative, provide assurance around the integrity of these instruments. This has helped address concerns around “greenwashing” and strengthened investor confidence.

Transparency and reporting are equally critical. Unlike conventional bonds, green and sustainable bonds typically include detailed impact reporting, allowing investors to track how their capital is deployed and what outcomes are being achieved. This has introduced a new level of engagement between issuers and investors, requiring more active oversight and due diligence from fund managers.

From a risk perspective, these bonds retain the core characteristics of traditional fixed income. Investors are generally exposed to the creditworthiness of the issuing entity—such as governments or major financial institutions—rather than to individual projects. This structure mitigates project-specific risks while still enabling capital to support a diversified pool of initiatives, from renewable energy infrastructure to public transport and social housing.

In Australia, issuance has been supported by both government and institutional borrowers. Programs such as those led by state funding authorities have demonstrated how capital can be channelled into large-scale infrastructure projects with clear environmental and social benefits, reinforcing the tangible connection between investment and impact.

Looking ahead, the growth trajectory for green and sustainable bonds remains compelling. The global transition to a low-carbon economy is expected to require trillions of dollars in investment over the coming decade, with bond markets playing a critical funding role. As supply increases and market depth improves, these instruments are likely to become a mainstream component of fixed income allocations.

For managed account portfolios, the implications are clear. Green and sustainable bonds offer a scalable, liquid, and return-competitive way to integrate ESG considerations without compromising portfolio objectives. Whether accessed through diversified bond funds or dedicated impact strategies, they provide an opportunity to enhance both financial and non-financial outcomes.

In a market environment where income remains a priority but investor expectations are evolving, green and sustainable bonds represent a natural progression—one that aligns capital with purpose while preserving the fundamental strengths of fixed income investing.

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