Green bonds: Fighting climate change in fixed income

green bonds

Achieving net zero means dramatically reducing global greenhouse emissions and compensating for any residual emissions by reabsorbing the same amount from the atmosphere. It requires a major shift in how investors allocate capital, and how they engage with companies to turn well-meaning ideas into action.

Here we explore one option that investors have to start their own climate transition. This involves mobilising some of the $127trn accumulated in the global bond market1.

We’re talking about ‘green bonds’, a relatively small but booming segment of the bond market. Green bonds offer investors a way to direct some of their capital towards climate projects. As we’ll see, the rationale for including them in portfolios is stronger than ever.

First things first: how do they work?

Investing with purpose

When you buy a normal or ‘vanilla’ bond, you’re lending your money to the issuing company or government with no strings attached. The issuer uses the proceeds for an unspecified purpose, and pays a coupon on the bond in return. Eventually—in most cases—you get your principal (loan) back.

Green bonds, in contrast, raise money for a specified purpose. For a bond to be certified as green, its proceeds must help fund climate or environmental projects. So, unlike with a vanilla bond, you will always know where your money is going. You can think of it as financing with ‘green strings attached’.

A green bond could be financing a new windfarm, or a project to increase a low-lying town’s flood resilience, or a train station refurbishment which boosts public transport use – any of a wealth of projects that will go on to benefit the environment in a specific, tangible way.

Put simply, green bonds offer much more transparency and measurability than normal bonds. Yet they still fly under the radar for many investors. Many, that is, but not all. Away from the mainstream, the green bond market has been booming in popularity.

For investors, there are several things worth knowing about this growing segment of the market.

Why green bonds are going mainstream

Speak to any climate activist and you’ll hear the fight against climate change is slow – too slow. One reason why is because climate projects need to be financed, and there hasn’t been a good mechanism for connecting investor cash with the green projects that need it most.

Let’s consider for a moment what climate-action or mitigation projects involve. This could be capital expenditure for new infrastructure, or major changes to existing systems, or investment in developing technologies. It all costs money, and sometimes that money is hard to find.

Green bonds open up a channel to deliver
 much-needed funding directly to green projects.

But it’s not an act of charity – these are investments, and so they come with a return. Just like their vanilla counterparts, green bonds pay a coupon. After all, a windfarm will generate and sell electricity. A new transport hub will process thousands of paying passengers. Flood resilience is worth paying for today if it reduces future costs. Investing in the energy transition is still investing.

That’s why, even putting environmental concerns aside, green bonds can be an attractive investment. They offer returns and diversify portfolio risk while contributing to climate action in a measurable way. And they are being rapidly snapped up by investors waking up to the fact that environmental benefits don’t have to come at a premium.

Investors are waking up to the potential

Green bonds are still a small part of the giant global bond market, but they’re on a very strong growth trajectory. Since the inception of the green bond market in 2007, global cumulative issuance has reached $2.3 trillion2.

Of note is the issuer mix for green bonds (the proportion of green bond issuers that are corporate, sovereign, local government, etc.) which is very different from the overall bond market. Just 11% of total issuance is from sovereign issuers – national governments – versus 53% in the global bond market. The reverse is true for corporate issuance: 45% of green bonds are issued by corporations, versus 18% in the global bond market. 

green bond issuance

Source: Bloomberg, Amundi as of 31/03/2023. *BClass classification. Green Bond as defined by Bloomberg. Past performance is not a reliable indicator of future performance.

We believe sovereign green bond issuance will rise further, bringing the issuer mix closer to what we see in the global bond market and increasing the size and diversity of the bonds on offer to investors.

Sovereign green bonds are increasingly used help to fund government investments in projects with environmental objectives (mostly climate change mitigation). In 2022, clean transport was the main beneficiary (almost 50%) of investment from green bond issuance by euro area governments, followed by energy efficiency (including green construction) and renewable energy which together represent a third of allocations. Progress has also been made in strengthening green capital markets with the European Green Bond Standard designed that aims to increase and expand the environmental ambitions of the green bond market.

With energy independence and security rapidly climbing the governmental agenda, even more may decide to issue green bonds to finance the transition, rather than rely on external fuel sources or less direct funding. That could create an interesting evolution of the market and offer new opportunities for fixed income investors.

Positive investing with a green bond ETF

Green bonds are a way for investors to get more certainty about the effect they make. With “use of proceeds” rules and impact reporting, they can be sure they’re funding green projects.

It means green bonds are both a powerful and positive investment. For all the alarming statistics on global warming, humanity still has a big opportunity to limit climate change before it’s too late. Scientific research has determined +1.5°C as the point after which there would be a catastrophic impact on the environment, our societies and life on earth. There’s a phenomenal amount of investor cash that could be mobilised to help keep warming at or below 1.5°C.

Green bonds provide a route forward to shift those trillions into projects where they will make the most difference.

Of course, for most people it’s not practical to buy and sell individual green bonds. Fortunately, specialist green bond ETFs offer an efficient alternative, bringing together labelled green bonds and providing them for investment in a simple ETF wrapper. The Lyxor Green Bond (DR) UCITS ETF (ticker: CLIM) is the original, and still by far the largest with €613 million under management2.

We measure and report on CLIM’s allocation of proceeds. In 2022, the top three sectors to receive proceeds from the Lyxor Green Bond (DR) UCITS ETF were Energy (41%), Green Buildings (28%) and Clean Transport (14%)3.

1. Energy

Electricity and heat production from renewable sources, transmission and smart grid infrasctructure, energy storage, etc.

2. Green Buildings

Construction of refurbishment of tertiary or residential buildings with low energy consumption certification, etc.

3. Clean Transport

Rail transport systems for merchandise or passengers, electric or alternative fuel vehicles, bicycle infrastructures, etc.

Please note: The approach implemented by the Lyxor Green Bond (DR) UCITS ETF by investing in green bonds is largely based on third party data that may be incomplete, inaccurate or unavailable from time to time, and which make it dependent on the quality and reliability of such information. Investment in green bonds may also induce sectoral biases in the global bond market. For more information, please refer to the prospectus of the fund.

Adding green bonds to your portfolio

The green bond market is relatively small but fast developing, offering a plethora of potential opportunities for fixed income investors.

As illustrated in the table below, we provide a growing number of options for adding green bonds to a portfolio.

Information on Amundi’s responsible investing can be found on amundietf.com and amundi.com. The investment decision must take into account all the characteristics and objectives of the Fund, as described in the relevant Prospectus.

1. Source : SIFMA, Capital Markets Factbook 2022, data as of 31 December 2021
2. Source : https://www.climatebonds.net/ 
3. Source: Amundi. Lyxor Green Bond ETF Range: Impact Report 2022


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