The rise of green and sustainable bonds are helping to reshape the fixed income market by allowing people to invest with a social and environmental purpose, without sacrificing their return on investment. Bill Bovingdon (Australian Ethical) examines this growing part of the market.
Fixed income plays an important role in any diversified portfolio. As an asset class, it provides a portfolio with various defensive qualities, including: relative stability in price, diversification benefits, liquidity, income and yield.
These are all important characteristics when building portfolios where regular and predictable cashflow is needed.

By Jayson Forrest
Bill Bovingdon
Investment Director
Australian Ethical

Nigel Douglas
Douglas Funds Consulting

In making the case for fixed income, Bill Bovingdon — Investment Director at Australian Ethical — points to most major economies moving towards cash rates of between 2.5-3 per cent. And while he believes that will provide a mild tailwind for bonds, he adds that steep yield curves will persist, as inflation risk remains. “Moving forward, with more persistent inflation expected, this means higher longer term rates, regardless of whether short-term rates continue to come down.”
However, against this backdrop, Bill believes a rapidly emerging trend within fixed income markets, particularly over the last five years, is allowing more investors to use this asset class to “invest for purpose”. This has been possible through the growth of the green and sustainable bond market.
Speaking on fixed income at the IMAP Independent Thought 2025 conference in Sydney, Bill believes green and sustainable bonds are one of the most significant developments in the market since fixed income securitisation in the 1970s.
These bonds are a relatively new concept that enables investors to get a second benefit out of the investments they make. It’s not just about the return. It’s about providing capital for ‘social good’, with a proviso of how that capital is going to be used, and doing it without sacrificing the returns investors get from holding fixed income assets
Green and sustainable bonds
Green and sustainable bonds effectively raise capital to fund projects with positive environmental and/or social outcomes. Green bonds specifically finance environmentally beneficial projects, while sustainable bonds have a broader scope, encompassing both environmental and social projects. Both operate similarly to traditional bonds, but the proceeds are ring fenced for their designated purposes. Bill believes while these bonds are relatively easy to understand, they are still under-appreciated by many investors.
By incorporating green and sustainable bonds within a portfolio, Bill says it provides the investor with all the characteristics and benefits of a typical fixed income allocation, while investing for purpose and without sacrificing returns.
“These bonds are a relatively new concept that enables investors to get a second benefit out of the investments they make. It’s not just about the return. It’s about providing capital for ‘social good’, with a proviso of how that capital is going to be used, and doing it without sacrificing the returns investors get from holding fixed income assets,” says Bill.
“Typically, capital is applied to some of the most important challenges we currently have globally. These include: addressing and mitigating the issues around climate change, tackling food and energy security, and creating social housing. Bonds have been issued to specifically address these types of issues.”
These types of bonds fund projects with positive environmental and/or social outcomes. They really give investors a connection with the projects they’re helping to fund, and provide people with cause for hope that we can actually deliver on some of the issues that actually make a difference in people’s lives
Confidence and certainty within the market
According to Bill, what’s important about the way this market has developed is how it has encompassed a set of features that allows for a degree of oversight and engagement that bond managers typically have never had.
“Through the agreed accreditation processes that bond issuers go through (as set out by the International Capital Market Association), there is a framework which has now become well-established in markets. A verification process through entities like the Climate Bonds Initiative, also provides a degree of certainty and confidence about the way this market operates.”
Reporting is also an important factor with green and sustainable bonds. Investor reporting enables investors to clearly see the impact their capital is having on funding these projects as they mature. Bill says engagement and reporting is an absolute necessity in this sector, because there is an expectation by investors that these bonds will deliver on their stated social and environmental objectives, while delivering a return on investment.
“You can’t do that on a passive basis,” he says. “We’ve seen the damage that greenwashing has done to the reputation of the ESG market. So, it’s essential to have proper integrity and transparency, and it’s incumbent on investors, like Australian Ethical, to maintain close engagement with issuers to ensure they actually fulfil their obligations.”
In the current market environment, Bill believes by investing in these types of bonds, retail investors can expect to receive a higher return than a term deposit rate. For example, diversified fixed income portfolios, like the Australian Ethical Altius Green and Sustainable Bond Fund, have been delivering returns of about 5-6 per cent over the last three years (after fees), providing investors with an active return of around 75 basis points.
(An active return of around 75 basis points means the investment outperformed its benchmark by 0.75 per cent, and is an indicator that that the portfolio manager’s decisions added more value to the portfolio than a passive investment tracking the same benchmark.)
“For the funds Australian Ethical manage, our fees are very competitive. That’s because we have scale. We’re able to tap into the ESG and ethics teams that service our whole organisation, which means additional costs are not carried by one product or asset class.”
Globally, green and sustainable bonds are going to be a growing and key component of fixed income markets. Increasingly, they will either be a part of people’s portfolios through their conventional funds, or if they want to have more of an impact component in their portfolios, they can go into a specialist fund that specifically targets these bonds
Bond issuance
Bill acknowledges that with Australia’s rapid electrification of the economy — a key part of Australia’s strategy to reduce greenhouse gas emissions by transitioning to clean and renewable energy — many green and sustainable projects will inevitably fail.
However, when assessing the long-term viability of these projects being brought to market, Bill says it’s important to remember that the way in which green bonds are constructed, means they don’t fund specific projects, which does significantly reduce the risk to investors. Effectively, this means investors don’t end up with an exposure, for example, to a solar or wind farm located in the desert.
Instead, by investing in green and sustainable bonds, investors are actually exposed to a program of projects by the issuing entity, which might be a state government (with the same credit quality as other state government funding) or a bank. According to Bill, for diversification purposes, banks will often fund a portfolio of projects, and then issue the green bond in the bank’s name, with the bank’s credit quality.
As an example of the types of projects that get funded through a green and sustainable bond, Bill points to NSW Treasury Corporation (TCorp).
According to Bill, TCorp’s sustainability bond program provides the vehicle for investors to specifically provide capital for sustainability initiatives in NSW — like Sydney Metro Northwest (Australia’s biggest public transport project, being the first fully automated electrified metro rail system in Australia), and CBD and SouthEast Light Rail (a 12km route designed to service major transport hubs within Sydney and connect commuters to buses, trains, ferries, and other light rail services).
“These types of bonds fund projects with positive environmental and/or social outcomes,” says Bill. “They really give investors a connection with the projects they’re helping to fund, and provide people with cause for hope that we can actually deliver on some of the issues that actually make a difference in people’s lives.”
In a normalised environment, like we have now, there are many opportunities for bond managers. This is demonstrated by how well bond managers have generally done over the last three years. It’s been a good time for active management
Bonds that are coming of age
Today, there are increasingly more green and sustainable bonds available for investors to choose from. According to Bill, these bonds are essentially ‘plug and play’ — they’re managed for the investor, so they are effectively just a traditional bond exposure against a composite bond index. And as these bonds are actively managed, they seek to add value well over what the index is providing.
“For Australian Ethical and other managers, we have more confidence about the future of this market, which allows us to actually increase the investment expectations and objectives on our products. We’ve also been able to bring down the tracking error and be in line with other active fixed income products.”
Bill believes green and sustainable bonds are coming of age and have a very bright future. He points to the estimated US$6-$10 trillion of finance needed for energy transition globally over the next 10 years, with a lot of that money coming through green and sustainable bonds.
“Globally, green and sustainable bonds are going to be a growing and key component of fixed income markets. Increasingly, they will either be a part of people’s portfolios through their conventional funds, or if they want to have more of an impact component in their portfolios, they can go into a specialist fund that specifically targets these bonds,” he says.
“In a normalised environment, like we have now, there are many opportunities for bond managers. This is demonstrated by how well bond managers have generally done over the last three years. It’s been a good time for active management.”
About
Bill Bovingdon is Investment Director at Australian Ethical.
He spoke on the topic of ‘Income with purpose’ at the IMAP Independent Thought 2025 conference in Sydney.
The session was moderated by Nigel Douglas — Chief Executive Officer at Douglas Funds Consulting.

