Sovereign Green Bonds and Greenium

India’s sovereign green bond market is gaining momentum as strong investor demand has pushed these bonds to trade at a persistent greenium compared with conventional government securities. The average greenium in the first half of FY2026–27 reached its highest level since India began issuing sovereign green bonds in FY2022–23, indicating growing investor acceptance of green financial instruments.

What is Greenium?

Greenium, or green premium, refers to the lower yield that investors are willing to accept on a green bond compared with a conventional bond having similar characteristics. Since bond prices and yields move inversely, a lower yield indicates that investors are willing to pay a higher price for green bonds.

A stable greenium can reduce the government’s borrowing cost for financing environmentally sustainable projects. It can therefore support investments in renewable energy, clean transportation, climate adaptation and other low-carbon activities, helping India progress towards its Net Zero by 2070 target.

A persistent greenium also indicates growing investor confidence and maturity of the domestic green-finance ecosystem, particularly in relation to India’s green-bond framework and project evaluation mechanisms.

What are Sovereign Green Bonds?

Sovereign Green Bonds (SGrBs) are government debt instruments introduced in the Union Budget 2022–23 to mobilise resources for projects supporting India’s transition towards a low-carbon economy.

The proceeds raised through SGrBs are earmarked exclusively for eligible green projects, which helps improve transparency and accountability in the use of funds.

India’s Sovereign Green Bond Framework was released by the Ministry of Finance in 2022 and is aligned with the International Capital Market Association (ICMA) Green Bond Principles, 2021.

Key Features

SGrBs are issued through a uniform-price auction, are eligible for repo transactions, and can be traded in the secondary market. They are also eligible for Statutory Liquidity Ratio (SLR) purposes, allowing eligible financial institutions to count them towards their mandatory SLR requirements.

Management of Sovereign Green Bonds

The proceeds from SGrBs are deposited into the Consolidated Fund of India and managed by the Public Debt Management Cell of the Ministry of Finance through mechanisms such as the Green Register.

The Green Finance Working Committee (GFWC), chaired by the Chief Economic Adviser, is involved in the selection and evaluation of eligible projects. The allocation and utilisation of funds are audited by the Comptroller and Auditor General (CAG).

The framework was also reviewed by CICERO, which rated it “Medium Green” with “Good Governance”, indicating alignment with international green-bond standards.

Current Status and Demand

India has around ₹877 billion of sovereign green bonds outstanding, with 30-year green bonds emerging as the dominant segment and outstanding issuance exceeding ₹500 billion.

Demand for green bonds has strengthened after some early issuances were cancelled or reduced because investors were not willing to accept yields considered suitable by the government. The growing demand for longer-maturity green bonds has subsequently strengthened the market.

Why are Investors Showing Strong Demand?

Insurance companies and pension funds have significant demand for long-term assets because their liabilities are also long-term. Green bonds classified as infrastructure investments provide greater flexibility for insurers while also helping them meet Asset-Liability Management (ALM) requirements.

The strong demand for 30-year green bonds therefore reflects the suitability of these instruments for institutions seeking long-duration assets.

Types of Sustainable Finance Instruments

Green Bonds

Green bonds are used to finance projects having a positive environmental impact. Their proceeds are ring-fenced for specific green projects, making their primary focus environmental and climate-related benefits. Sovereign Green Bonds are an example.

Social Bonds

Social bonds finance projects designed to generate positive social outcomes. Their proceeds are directed towards specific social projects, particularly those benefiting vulnerable, marginalised or underserved populations.

Sustainability Bonds

Sustainability bonds combine both environmental and social objectives. Their proceeds are allocated to a mixture of green and social projects, making them a hybrid use-of-proceeds instrument.

Sustainability-Linked Bonds

Sustainability-Linked Bonds (SLBs) are different from green and social bonds because their proceeds are generally not restricted to specific projects. Instead, their financial terms are linked to the issuer’s achievement of predetermined sustainability targets.

UltraTech Cement’s 2021 issuance is cited as India’s first overall and dollar-denominated sustainability-linked bond, with a target of reducing carbon intensity by 22.2% by 2030.

Green Bonds vs Sustainability-Linked Bonds

The key distinction is that green bonds are use-of-proceeds instruments, meaning the money raised must finance specified eligible green projects. In contrast, sustainability-linked bonds connect financial conditions to sustainability performance targets and can generally be used for broader corporate purposes.

Significance for India

A growing sovereign green bond market can help India mobilise private and institutional capital for renewable energy, clean infrastructure, climate adaptation and low-carbon development. A persistent greenium further suggests that investors are willing to accept relatively lower returns in exchange for exposure to credible green investments, potentially reducing the cost of climate financing for the government.