Green Bonds Promise a Use of Proceeds, Not a Better Return
A green bond is an ordinary bond with a label attached to where the money goes. The credit risk is identical to the issuer other debt, which is the part most people miss.
What the Label Actually Covers
A green bond is a debt instrument where the issuer commits that an amount equal to the proceeds will fund environmental projects: renewable generation, grid upgrades, efficient buildings, clean transport.
The European Investment Bank issued the first one in 2007 and the World Bank followed in 2008. The market grew slowly for years, then accelerated, passing 500 billion dollars of annual issuance in 2021.
The label describes use of proceeds. It says nothing about the issuer as a whole, and nothing about the security ranking of the bond.
The Recourse Point That Gets Missed
Money is fungible. The proceeds go into a designated pool, but the repayment obligation is a general claim on the issuer, ranking exactly alongside its conventional bonds.
If the issuer defaults, holders of the green bond and holders of the plain bond recover the same amount from the same estate. The wind farm is not collateral.
A green bond is not a claim on a green project. It is a claim on the issuer, with a promise about where the cash was spent. Those are entirely different instruments and only one of them is being sold.
Who Decides What Counts as Green
There is no single legal definition. Most issuance follows the Green Bond Principles, a voluntary framework published by the International Capital Market Association covering four components: use of proceeds, project evaluation, management of proceeds, and reporting.
Voluntary is the operative word. Issuers typically buy a second party opinion from a reviewer confirming the framework looks credible, which is an opinion on the framework rather than an audit of the spending.
The European Union has pushed toward a stricter standard tied to its taxonomy of qualifying activities, which raises the bar and also raises the cost of issuing.
The Greenium, and How Small It Is
Because some funds have mandates that require green assets, demand for the label can exceed supply, and the bond prices slightly richer than the issuer conventional curve. That yield gap is called the greenium.
| What issuers get | Rough size |
|---|---|
| Yield saving vs own curve | Often 0 to 5 basis points |
| Order book oversubscription | Typically larger than vanilla |
| Framework and review costs | One off, plus annual reporting |
| Reputational exposure if proceeds are questioned | Hard to quantify |
A few basis points on a ten year bond is real money at size, and it is nowhere near large enough to change what a company decides to build. The projects were mostly getting funded anyway.
The Additionality Question
The strongest criticism of the market is that it rarely funds anything new. A utility that was always going to build transmission lines relabels that spending and issues green paper against it.
Nothing improper happened. The proceeds genuinely went to a qualifying project. But if the capital expenditure would have occurred regardless, the bond changed the funding label and not the emissions path.
Defenders argue the label still does work: it builds a dedicated investor base, forces internal tracking of environmental spending, and creates a disclosure trail that did not exist before.
How to Read One as an Analyst
Start with the credit, exactly as you would for any bond, because the label does not improve recovery. Then read the framework to see how broadly the eligible categories are drawn, since wide categories let almost any capital expenditure qualify.
Check whether allocation reporting is published annually and whether it is externally verified. Check whether unallocated proceeds sit in cash or general funding, because a long lag between issuance and spending weakens the claim.
The Bottom Line
A green bond carries the issuer credit risk with a promise about where the proceeds went, enforced by a voluntary framework rather than a statute. The yield advantage to issuers is a handful of basis points and most proceeds fund projects that were already planned. The label is a disclosure and marketing mechanism, and pricing it as anything more than the issuer ordinary credit is a mistake.