Sustainable Investing

Western Asset actively manages diversified fixed-income portfolios with the goal of delivering attractive risk-adjusted returns for clients over the long-term; our primary focus since the Firm’s founding more than 50 years ago.

Western Asset’s approach to enviromental social and governance (ESG) has been developed to support our clients’ investment needs and sustainability preferences, while maintaining the Firm’s consistency with our view that ESG factors may have an impact on the creditworthiness of a particular issuer, and as a result may impact the portfolio returns of our clients.

As a signatory to the United Nations-supported Principles for Responsible Investment (PRI) Initiative since 2016 and a signatory to the UK Stewardship Code since 2022, we work alongside other institutional investors around the globe to advance responsible investing practices. Furthermore, Western Asset engages directly with issuers to help advance their ESG practices and their green, social and sustainability bond issuance.


In addition to our work with PRI, Western Asset collaborates selectively with organizations/initiatives such as the Task Force on Climate-Related Financial Disclosures (TCFD), Transition Pathway Initiative (TPI) and the United Nations Assessing Sovereign Climate-Related Opportunities and Risks (ASCOR) Project to advance and support our clients’ sustainable investment objectives.

Western Asset’s activities in working groups include:

  • PRI Sovereign Debt Advisory Committee
  • PRI Sub-sovereign Debt Advisory Committee
  • ASCOR Working Groups on climate policy and financing needs
  • IIF Principles Consultative Group



We continue to make significant progress helping clients meet their sustainable investing goals. Some recent achievements include:

  • Launching a variety of Article 8 funds under the EU Sustainable Finance Disclosure Regulations (SFDR) that address the sustainable investment goals of clients across all fixed-income asset classes
  • Implementing a centralized system to document and share issuer research, ESG assessments and ratings, as well as engagements across the Firm
  • Developing methodologies to assess physical and transition climate risks within our proprietary risk system, Western Asset Information System for Estimating Risk (WISER)
  • Integrating additional high quality ESG data to enable deeper assessment of issuers and fulfillment of customized client reporting requirements

2023 Stewardship Report

Working Toward a Shared Future

Western Asset is a proud signatory of the UK Stewardship Code, which sets high stewardship standards for those investing on behalf of UK savers and pensioners, and those who support them.

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Sustainable Investing with Western Asset

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ESG Integration

Western Asset investment professionals consider a wide range of macroeconomic and geopolitical factors in composing an outlook that describes the challenges and opportunities facing sovereigns, industries and companies. This process guides our approach of integrating financially material ESG considerations into a given portfolio.

Western Asset’s research analysts examine financially material ESG factors at the issuer level, focusing on those that can potentially affect creditworthiness. We draw upon proprietary research as well as third party models to assess an issuer’s ESG performance and outlook. The types and relative importance of factors vary depending on the sector as well as the individual issuer. Investments that do not meet Western Asset’s standards are treated as having higher risk, as their future ability to pay may be adversely affected by developments such as legal sanctions, the introduction of new regulations or shifts in consumer sentiment. We then evaluate whether the market is appropriately pricing the issuer’s performance based on those ESG factors.

A growing number of the issuers we consider for investment have exposure to environmental factors that must be weighed when building portfolios. Traditionally, these have included utilities for which regulation places precise requirements around environmental quality factors. Western Asset has also long recognized the environmental challenges inherent in heavy industry sectors such as metals and mining, machinery, and oil and gas. However, environmental concerns apply across many other sectors as changes in energy costs and in climate conditions may have pervasive effects.

Social factors can also impact consumers’ perception of an issuer as well as the issuer’s operations. We consider a number of social factors, including employee relations, workplace safety practices, consumer protection policies, recruiting and talent development, and community relations. Social considerations are particularly important in our evaluation of sovereign issuers, where demographic composition, socioeconomic trends and income distribution can affect the growth trajectory of a country.

Governance plays a critical role in Western Asset’s ESG analysis, as it lays the foundation for a well-run, sustainable business. We consider governance crucial not only as a standalone risk factor, but also as a signal for how the issuer manages its long-term environmental and social issues. Without superior governance practices, which include proactive management, robust reporting and strong risk controls, Western Asset cannot have confidence that leadership and integrity will be in place for environmental and social factors.

With all ESG factors, we evaluate the extent to which each issuer is adapting to improve its practices in the changing environment. Western Asset views corporate sustainability initiatives and disclosures as important indicators of how issuers manage their operational costs, and we further develop our understanding through dialogue.

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Because Western Asset explores a wide range of investment opportunities that encompass many private and public issuers, dialogue between our research analysts and issuer management is key to evaluating these opportunities. What is more, due to our size and presence in the marketplace, we can often influence how debt issuers structure the securities we invest in on our clients’ behalf.

Engagement with management allows our research analysts to obtain additional perspective on ESG concerns that are inadequately addressed by existing policies and disclosures. In some cases, particularly with privately held issuers, our research analysts can serve to increase awareness of the importance of ESG considerations through their conversations with management.

Although bondholders obviously possess very different legal rights than shareholders, Western Asset believes it can impact corporate ESG practices given its role in determining issuers’ cost of debt capital. As long-term, value-oriented investors, we require compensation in wider spreads from issuers that lag their peers in ESG practices. Conversely, we reward issuers whose ESG profiles we believe will improve but whose spreads overcompensate for historical deficiencies.

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Western Asset as a Sustainable Investment Partner

We recognize there is no universal standard for evaluating financially material ESG factors for all the investments we make on behalf of our clients. Because we have been actively integrating ESG for many years, however, we have developed our own methodologies and work closely with issuers and clients to communicate transparently and improve our approach.

Asset owners can vary greatly in terms of the specific values and themes they seek to express in their portfolios. While we have historically integrated sustainability analysis into all of our portfolios as part of our fundamental value research, we also closely partner with clients committed to sustainable investing who desire to overlay views of a more specific nature (e.g., environmental preservation or exclusion of specific business activities).

Looking forward, we recognize that sustainable investing across fixed-income sectors is evolving. Through collaboration with other institutional investors, we seek to shape its progress.

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"At Western Asset, we view sustainable investing through a truly global lens. Our investment professionals across the world work in collaboration, allowing us to refine and advance our approach. At the same time, we’re gratified to see interest in sustainable investing flourishing worldwide, as more investors seek it out to help them identify value and mitigate risk."

Bonnie Wongtrakool

Global Head of ESG Investments/Portfolio Manager

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