Green Bond
A Green Bond is a fixed-income instrument whose proceeds are earmarked exclusively for projects with environmental benefits, such as renewable energy, clean transportation, sustainable water management, or climate-change adaptation.
The green bond market traces its origins to 2007 and 2008, when the European Investment Bank and the World Bank issued the first labeled green bonds. The market has grown into a multi-trillion-dollar segment of global fixed income, with sovereign, supranational, municipal, and corporate issuers all participating.
The defining feature of a green bond is the use-of-proceeds commitment. Unlike a conventional bond where investors have no say in how funds are deployed, green bond investors receive contractual assurances — documented in a green bond framework — that the capital will finance eligible projects. The International Capital Market Association (ICMA) Green Bond Principles provide voluntary guidelines covering four components: use of proceeds, process for project evaluation, management of proceeds, and reporting.
Verification matters because the label is self-declared. Issuers typically commission a second-party opinion from a specialized reviewer such as Sustainalytics, V.E (formerly Vigeo Eiris), or ISS ESG to confirm that the framework aligns with market standards. Post-issuance impact reporting is expected but not always rigorously enforced.
For US issuers, the SEC has not created a separate regulatory regime for green bonds, but it has signaled attention to misleading environmental claims under existing anti-fraud provisions. Municipal green bonds have grown rapidly in the United States, often financing public transit, water infrastructure, and resilience projects. The IRA (Inflation Reduction Act) of 2022 created incentives that accelerated corporate green bond issuance across the clean-energy supply chain.
Green bonds typically carry the same credit risk as conventional bonds from the same issuer — the green label does not change the issuer's creditworthiness. However, empirical research has found modest pricing benefits (a greenium) in some markets, where investor demand allows green bond issuers to borrow at slightly tighter spreads than equivalent conventional bonds.