Sustainability-Linked Bond [SLB]

Sustainability-Linked Bonds (SLBs) are debt instruments where financial and structural characteristics vary depending on whether the issuer achieves predefined sustainability/ESG objectives. Unlike green bonds funding specific projects, SLB proceeds can be used for general purposes, with coupon rates typically stepping up 25-50 basis points if sustainability targets are missed. For example, Enel issued SLBs with rates increasing if renewable energy capacity targets aren’t met by specific dates. Key Performance Indicators (KPIs) must be relevant, measurable, and ambitious, such as greenhouse gas reduction, renewable energy percentage, or diversity metrics. Sustainability Performance Targets (SPTs) require external verification and regular reporting. The SLB market reached $200 billion outstanding by 2023, appealing to issuers in carbon-intensive industries unable to issue green bonds. Benefits include flexibility in use of proceeds, accountability mechanisms, and alignment with corporate sustainability strategies. Criticisms include weak penalties for missing targets, cherry-picking easy KPIs, and limited legal recourse. The International Capital Market Association’s SLB Principles provide voluntary guidelines. Investors increasingly demand science-based targets aligned with Paris Agreement goals.