How are bonds classified in Debt Capital Markets (DCM)?

Explore the different types of bonds and debt structures within the Debt Capital Markets (DCM) ecosystem, including the key technical distinctions based on issuer type, credit quality, interest rate structure and maturity profile.

The bond market is a cornerstone of the global financial system. It provides companies, financial institutions and public-sector entities with an efficient source of funding, while offering investors access to recurring income streams and portfolio diversification.

Within DCM, bonds are typically classified according to several criteria, including issuer type, credit quality, interest rate structure and maturity. This segmentation enables investors to select instruments aligned with their risk appetite and investment horizon, while allowing issuers to optimise their funding strategies. In recent years, sustainable instruments such as green bonds have gained significant traction, reflecting growing demand for investments with environmental and social impact.

Corporate debt: key bond types and seniority

Corporate debt refers to bonds issued by companies to institutional investors in exchange for periodic interest payments and the repayment of principal at maturity. It represents a core funding tool to support growth, operations and liquidity management.

Corporate bonds vary in terms of structure, risk profile and seniority, which directly influence both expected returns and investor protection. The main categories include:

Investment grade bonds: characterised by strong credit ratings and lower default risk, offering moderate returns.

High yield bonds: higher-risk instruments that provide enhanced returns to compensate for increased credit risk.

Convertible bonds: hybrid instruments that can be converted into equity under predefined conditions, combining fixed income and equity features.

Investment grade bonds are generally issued on an unsecured basis, meaning that repayment depends primarily on the issuer’s overall creditworthiness and cash flow generation capacity. By contrast, high yield bonds are more likely to include collateral or security packages, providing investors with enhanced protection and priority in the event of default.

Seniority is a key concept in bond markets, as it determines the order of repayment in a default scenario. Senior bondholders are repaid first, followed by subordinated or hybrid instruments, which carry higher risk and typically offer higher returns.

SSA issuance: sovereign, supranational and agency bonds

SSA (Sovereign, Supranational and Agency) bonds play a critical role in global financial stability and the financing of large-scale projects. These instruments are issued by national governments, international organisations and public agencies, and are generally characterised by high credit quality, strong liquidity and close links to the public sector.

The main categories include:

Sovereign bonds: issued by national governments to finance public spending, manage national debt and support economic policy. They often serve as benchmark instruments for pricing across financial markets, with risk levels linked to each country’s credit profile.

Supranational bonds: issued by international organisations to fund development, infrastructure and humanitarian projects. These bonds typically benefit from strong credit ratings due to the backing of member states.

Agency bonds: issued by government-related entities or state-sponsored enterprises to finance specific activities. They may carry explicit or implicit government support and usually offer slightly higher yields than sovereign bonds, while maintaining relatively low credit risk.

Bank debt: instruments and capital structure

Banks rely on debt capital markets as a key source of funding to support their core activity, particularly lending to households and businesses. Unlike other issuers, banks issue a wide range of instruments not only for funding purposes but also to meet regulatory requirements related to capital and loss-absorbing capacity.

As a result, bank debt markets play a central role in the financial system, enabling institutions to diversify funding sources beyond deposits while strengthening their capital structure. For investors, they offer a broad spectrum of instruments with varying levels of risk, return and protection.

Bank debt instruments are primarily differentiated by their position within the capital structure, or seniority, which determines the order of repayment in a stress or resolution scenario.

The capital structure ranges from highly secured instruments to those specifically designed to absorb losses:

Covered bonds: covered bonds are high-quality debt instruments backed by a dual recourse structure: investors benefit both from the issuing bank’s creditworthiness and from a pool of high-quality assets (typically mortgages). This significantly reduces risk and results in strong credit ratings and lower funding costs.

Senior preferred: senior preferred debt is unsecured but ranks high in the capital structure, giving investors priority over more subordinated instruments. It is widely used for general funding purposes and is considered relatively low risk within the bank debt universe.

Senior non-preferred: positioned below senior preferred, this instrument is designed to absorb losses in resolution scenarios, in line with post-crisis regulatory frameworks. It plays a key role in meeting requirements such as MREL and TLAC.

Tier 2 subordinated debt: tier 2 instruments form part of a bank’s regulatory capital and rank below all senior debt. They carry higher risk and offer higher returns, with longer maturities and potential loss absorption features.

Additional Tier 1 (AT1): AT1 instruments are the most complex and highest-risk segment. They are perpetual in nature and include loss absorption mechanisms such as conversion into equity or principal write-downs. Coupon payments are discretionary, which increases risk but also enhances potential returns.

Overall, bank debt features a more complex structure than other asset classes, reflecting its dual role in funding and regulatory compliance. This diversity makes it a key segment of global capital markets.

Coupon structures: fixed vs floating rate notes

Interest payment structures are a key differentiator in bond markets.

Fixed-rate bonds provide a constant coupon over the life of the instrument, offering predictable income streams. However, they are sensitive to interest rate movements: rising rates typically reduce their market value.

Floating-rate notes (FRNs) have coupons linked to benchmark rates such as SOFR, €STR or Euribor, plus a fixed spread. This structure provides protection in rising rate environments, as coupons adjust upwards, reducing price volatility. However, income declines when rates fall.

ESG bonds

Growing investor demand for sustainable investments has driven the expansion of ESG bonds across global markets. The integration of environmental, social and governance criteria has reshaped DCM, supported by international standards such as those published by the International Capital Market Association (ICMA).

Key ESG instruments include:

Green bonds: finance projects with environmental benefits, such as renewable energy or sustainable water management.

Social bonds: fund initiatives with positive social impact, including affordable housing and financial inclusion.

Sustainability bonds: combine environmental and social projects within a single framework.

Sustainability-linked bonds (SLBs): linked to the issuer’s sustainability performance targets rather than the use of proceeds, with financial terms that may vary depending on KPI achievement.

Each of these instruments reflects a different structural approach and level of commitment for issuers.

At BBVA CIB, we support corporates, financial institutions and public-sector clients in accessing debt capital markets.

We work alongside our clients to structure and execute tailored debt issuances aligned with their strategy, market conditions and long-term objectives.

Our global DCM platform combines sector expertise, structuring capabilities and access to international investors to deliver efficient, bespoke financing solutions.