Introduction
Capital raises and debt issuance for financial institutions generate some of the largest and most consistent fee pools in investment banking. Unlike corporate issuers who raise debt and equity based on business needs and market conditions, financial institutions must continuously issue capital instruments to meet regulatory requirements that specify minimum amounts of each capital tier. This creates recurring, structural demand for FIG capital markets services that does not exist in any other sector. For FIG bankers, capital markets advisory requires mastery of the Basel III capital framework, TLAC/MREL requirements for G-SIBs, rating agency equity credit methodologies, and the instrument-specific mechanics that determine whether a security counts toward CET1, AT1, Tier 2, or TLAC.
The Bank Capital Instrument Stack
Bank capital instruments form a hierarchy defined by loss absorption, permanence, and regulatory treatment. Each tier has distinct structural features and investor bases.
- Regulatory Capital Instruments
Bank regulatory capital is organized into tiers based on loss-absorbing capacity. CET1 (Common Equity Tier 1) consists of common stock and retained earnings, the highest quality capital that absorbs losses first. AT1 (Additional Tier 1) includes perpetual instruments (CoCo bonds, preferred stock) with contractual loss absorption through write-down or conversion to equity when the bank's CET1 ratio falls below a trigger level (typically 5.125% or 7%). Tier 2 includes subordinated debt with minimum five-year original maturity that absorbs losses in insolvency. TLAC/MREL-eligible debt includes senior unsecured bonds and senior non-preferred debt that can be bailed in during resolution. The total capital stack runs from CET1 (most loss-absorbing, most expensive) through TLAC-eligible senior debt (least loss-absorbing, cheapest), with each tier serving a specific function in the resolution framework.
| Instrument | Regulatory Tier | Key Features | Typical Yield (2024) |
|---|---|---|---|
| Common equity | CET1 | Permanent, fully loss-absorbing, dilutive | Cost of equity (10-12%) |
| AT1 / CoCo bonds | Additional Tier 1 | Perpetual, write-down/conversion trigger, callable | ~8% (400 bps spread) |
| Subordinated debt | Tier 2 | 5-10 year maturity, loss-absorbing in insolvency | 5-7% |
| Senior non-preferred | MREL/TLAC | Bail-in eligible, ranks below senior preferred | 4-6% |
| Senior unsecured | TLAC (if eligible) | Standard bonds, bail-in eligible for G-SIBs | 3-5% |
| Covered bonds | Not capital | Secured by mortgage pools, lowest cost funding | 2-4% |
US banks accelerated equity issuance in late 2024 and early 2025. KeyCorp raised $2.8 billion in equity in 2024. New York Community Bancorp raised over $1 billion in private capital after its commercial real estate stress. Old National Bancorp announced a $400 million common equity offering. In aggregate, US banks raised $1.7 billion through share sales in January-February 2025 alone, approaching the $1.8 billion raised in the entire preceding ten months, as institutions positioned for M&A activity and balance sheet strengthening.
The AT1/CoCo Bond Market Recovery
The March 2023 write-down of $17 billion in Credit Suisse AT1 bonds (which were wiped out while equity holders received compensation through the UBS merger) sent shockwaves through the contingent convertible market. The AT1 market index took approximately eight months to fully retrace its losses, but the recovery was decisive.
European bank capital issuance in January 2024 alone included approximately $30 billion in senior preferred bonds, over $20 billion in senior non-preferred, $13 billion in Tier 2 across 16 issuers, and $16 billion in senior unsecured. The scale of FIG debt issuance dwarfs most corporate sectors, with total annual European bank bond supply in the hundreds of billions of euros.
Insurance Capital: Surplus Notes, Hybrids, and Catastrophe Bonds
Insurance capital instruments reflect a different regulatory framework (RBC for US insurers, Solvency II for European) but serve the same fundamental purpose: meeting regulatory capital requirements while optimizing the cost of capital.
Surplus notes are the insurance equivalent of subordinated debt. They are unsecured obligations subordinated to all policyholders and creditors, with interest and principal payments requiring state insurance commissioner approval. Under statutory accounting, surplus notes receive equity treatment (because of their deep subordination), making them attractive for capital adequacy purposes despite being debt instruments under GAAP. Mutual insurers that cannot issue equity rely heavily on surplus notes for capital management.
Catastrophe bonds represent the fastest-growing segment of insurance capital markets. The cat bond market achieved record issuance of $17.7 billion across 93 transactions in 2024, with the outstanding market reaching $49.5 billion. The broader insurance-linked securities (ILS) market capacity hit a record $107 billion at year-end 2024. Cat bonds are structured through special purpose vehicles (SPVs) that transfer specific catastrophe risks (earthquakes, hurricanes, floods) from insurers and reinsurers to capital market investors. Maturities typically range from 3-5 years, with yields providing meaningful premiums over traditional credit instruments.
How FIG Bankers Advise on Capital Markets
FIG capital markets advisory spans the full instrument stack. Capital structure optimization involves determining the mix of CET1, AT1, Tier 2, and TLAC-eligible debt that meets all regulatory requirements at the lowest blended cost of capital. A bank that over-relies on expensive CET1 capital when it could substitute cheaper Tier 2 debt is leaving value on the table; a bank that under-capitalizes relative to stress test requirements faces restrictions on dividends and buybacks.
Instrument design and structuring requires tailoring features (call dates, coupon structures, conversion triggers, maturity profiles) to current market conditions and the issuer's specific capital plan. After the Credit Suisse episode, AT1 structuring required particular attention to loss-absorption mechanics and creditor hierarchy protections that reassured investors.
Timing and execution involves reading market windows, building investor books, and managing pricing. FIG issuance is heavily concentrated in the first quarter of each year (banks front-load annual funding plans), creating a competitive dynamic where execution skill directly impacts pricing outcomes.
Capital markets advisory is where FIG teams collaborate most directly with product groups (debt capital markets, equity capital markets, leveraged finance). The FIG banker brings sector expertise (which capital tier does the issuer need, how does the instrument interact with regulatory ratios, what are rating agency implications) while the product group brings execution capability (investor relationships, book-building, pricing). This collaboration produces transactions that neither group could execute alone and generates fees that make capital markets a core revenue driver alongside M&A advisory for every FIG franchise.
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