Walking Through a Bank Balance Sheet

Introduction

In standard corporate finance, you learn to build models income-statement-first: project revenue, derive costs, and then adjust the balance sheet for working capital and capex changes. In banking, the process is reversed. The balance sheet drives the income statement. You project asset growth (loan growth, securities portfolio changes) and liability growth (deposit inflows, borrowing needs) first, and then derive the income statement from those balance sheet projections. NII is a function of earning asset yields and funding costs. The provision reflects credit risk in the loan portfolio. Fee income relates to AUM, transaction volumes, and client activity levels tied to the bank's business scale.

This reversal is the reason that walking through a bank balance sheet is one of the most important foundational skills in FIG. Interviewers test it frequently, and the quality of your answer reveals whether you understand the mechanics of how banks operate.

Bank assets are organized by liquidity, from the most liquid (cash) to the least liquid (other assets). For JPMorgan Chase, total assets were approximately $4.0 trillion as of year-end 2024, making it the largest US bank by assets.

Cash and Cash Equivalents

The most liquid asset category includes vault cash, deposits held at the Federal Reserve (reserve balances), and deposits held at other banks. Large banks maintain significant cash positions to meet the Liquidity Coverage Ratio (LCR), which requires banks to hold enough High-Quality Liquid Assets (HQLA) to survive 30 days of net cash outflows under a stress scenario. Cash and US Treasuries are Level 1 HQLA (counted at 100% of value), while agency MBS and investment-grade corporate bonds are Level 2 (counted at 85% or lower). Cash earns the federal funds rate (or the interest on reserve balances rate set by the Fed), which makes it a low-yielding but essential component of the asset base. The Net Stable Funding Ratio (NSFR) complements LCR by ensuring longer-term funding stability, requiring banks to maintain available stable funding above their required stable funding over a one-year horizon.

Investment Securities

The securities portfolio is divided into two accounting categories with dramatically different implications for the balance sheet and income statement.

Held-to-maturity (HTM) securities are carried at amortized cost on the balance sheet. Unrealized gains and losses from market value changes are not reflected in the financial statements unless the securities are impaired. Banks classify securities as HTM when they intend and have the ability to hold them until maturity. The advantage is balance sheet stability; the risk is hidden: during the 2022-2023 rate hiking cycle, many banks had significant unrealized losses in their HTM portfolios that were not visible on the balance sheet. Silicon Valley Bank's collapse was directly linked to this dynamic.

Available-for-sale (AFS) securities are carried at fair value on the balance sheet, with unrealized gains and losses flowing through Other Comprehensive Income (OCI) and into Accumulated Other Comprehensive Income (AOCI) in equity. AFS securities provide more transparency but create volatility in tangible book value as market values fluctuate. The tradeoff between HTM and AFS is fundamentally about which volatility a bank prefers to accept: mark-to-market volatility in AOCI (AFS) or the risk of hidden losses that only surface if the securities must be sold (HTM). After the 2023 banking crisis, the market has shifted toward demanding greater AFS transparency, particularly for larger institutions where the stakes are systemically significant and investor scrutiny is highest.

HTM vs. AFS Classification

The two accounting categories for bank investment securities. HTM securities are carried at amortized cost with no mark-to-market on the balance sheet, creating stability but potentially hiding unrealized losses. AFS securities are marked to fair value, with changes flowing through AOCI in equity. The classification choice has direct implications for regulatory capital: under Basel III, large banks (Category I-III) must include AOCI in their CET1 calculation, meaning AFS unrealized losses reduce regulatory capital. Smaller banks can elect to exclude AOCI from capital calculations (the "AOCI opt-out"). This distinction became critical during the 2023 banking stress when unrealized losses in securities portfolios eroded capital ratios.

The Loan Portfolio

The loan portfolio is the largest and most important asset category for most commercial banks, representing the core of the lending business. JPMorgan's loan portfolio is approximately $1.3 trillion, representing roughly 32% of total assets. For regional and community banks, loans typically represent 60-75% of total assets.

The loan portfolio is reported in several sub-categories:

Each sub-category carries different yield characteristics, credit risk profiles, and regulatory risk weights. C&I loans are typically floating rate (tied to SOFR plus a spread), which means they reprice quickly as rates change, benefiting the bank when rates rise. Fixed-rate residential mortgages offer stability but create duration risk: if rates rise, the bank holds long-duration assets funded by shorter-duration liabilities. Credit card receivables carry the highest yields (often 18-24% APR) but also the highest loss rates (net charge-off rates of 3-6% in normal environments). Understanding how these sub-portfolios interact is essential for modeling a bank's NII sensitivity to rate changes and for assessing credit risk in M&A due diligence.

Allowance for Credit Losses

The Allowance for Credit Losses (ACL) is a contra-asset that reduces the gross loan portfolio to its net realizable value. It represents management's estimate of lifetime expected credit losses on the loan portfolio under the CECL framework. The allowance is built up through the provision for credit losses on the income statement and drawn down through actual charge-offs.

For FIG analysts, the ratio of the allowance to total loans (the coverage ratio) and the ratio of the allowance to non-performing loans (the NPL coverage ratio) are key indicators of reserve adequacy. An under-reserved bank is a risk because the acquirer inherits credit losses that have not been provisioned for. An over-reserved bank may be sitting on future earnings that can be released through provision reversals. During M&A due diligence, FIG analysts independently assess the target's loan portfolio quality (re-grading individual credits, stress testing the CRE book, evaluating consumer delinquency trends) to determine whether the reported ACL is adequate or whether a purchase accounting fair value adjustment is needed to reflect true expected losses.

Other Assets

Other balance sheet assets include goodwill and intangible assets (from prior acquisitions), mortgage servicing rights (MSRs), deferred tax assets, premises and equipment, and derivative assets.

Goodwill and intangible assets arise when a bank acquires another institution at a premium to tangible book value. JPMorgan carries approximately $53 billion in goodwill from its acquisition history (including Bear Stearns, Washington Mutual, and numerous other transactions). For FIG valuation purposes, goodwill and intangibles are stripped out of book value to arrive at tangible book value, the denominator in the P/TBV multiple. Under Basel III, goodwill is also deducted from CET1 capital, which means every acquisition that creates goodwill directly reduces the acquirer's regulatory capital ratio.

Mortgage servicing rights (MSRs) represent the contractual right to service a pool of mortgage loans (collecting payments, managing escrow, handling delinquencies) in exchange for a servicing fee. MSRs are unique because their value increases when interest rates rise (as prepayment speeds slow, extending the servicing income stream), making them a natural hedge against rate risk in the rest of the balance sheet. Deferred tax assets (DTAs), which represent future tax benefits from operating losses or timing differences, are partially deductible from CET1 capital if they exceed 10% of CET1.

Bank liabilities represent the funding that the bank uses to support its asset base. Because debt is raw material for banks, the liabilities side of the balance sheet is not something to minimize (as you would for a corporate company) but rather something to optimize: low-cost, stable funding is the foundation of a profitable bank.

Deposits

Deposits are the dominant liability, typically representing 60-80% of total liabilities for commercial banks. JPMorgan held approximately $2.4 trillion in deposits, representing roughly 63% of its total liabilities and the largest deposit franchise in the US.

Deposits are categorized by type and cost:

The deposit composition directly determines a bank's funding cost and, through that, its profitability. A community bank with 30% non-interest-bearing deposits and an average cost of funds of 1.8% has a structural NIM advantage over a bank that relies on CDs and brokered deposits at 4.5%. This is why deposit franchise quality is the single most scrutinized balance sheet attribute in bank M&A. Acquirers are essentially buying the funding advantage that the target's deposit base provides, and the deposit premium paid (typically 2-8% of core deposits) capitalizes that advantage into the purchase price.

Borrowings

Beyond deposits, banks fund themselves through various borrowed funds:

These wholesale funding sources are more expensive than core deposits and more volatile (they can be withdrawn or not rolled over during stress events). This is why regulators and analysts closely monitor the loans-to-deposits ratio: a ratio significantly above 100% signals dependence on non-deposit funding, which increases both cost and risk. JPMorgan's loans-to-deposits ratio of approximately 56% reflects its conservative funding position.

European bank balance sheets include an additional funding instrument with no US equivalent: covered bonds, which are debt securities backed by a dedicated pool of mortgage or public sector loans that remain on the issuing bank's balance sheet. Covered bond issuance reached approximately EUR 284 billion in 2024, with EUR 303 billion expected in 2025, as European banks replace maturing ECB lending facilities with market-based funding. European banks also face MREL (Minimum Requirement for Own Funds and Eligible Liabilities), the EU equivalent of TLAC, which requires banks to hold sufficient loss-absorbing liabilities. Unlike TLAC, which applies only to G-SIBs, MREL applies to all EU banks, creating issuance demand across the full spectrum of European institutions. EU banks needed to roll over approximately EUR 220 billion in MREL instruments by mid-2025.

Bank equity is structured similarly to corporate equity but carries additional importance because of regulatory capital requirements. Unlike corporate equity, which exists primarily for shareholder value purposes, bank equity serves a dual function: it absorbs losses to protect depositors and it satisfies regulatory minimums that determine the bank's ability to grow, pay dividends, and execute acquisitions. A bank whose CET1 ratio falls close to regulatory minimums faces restrictions on capital returns and may be required to raise equity, diluting existing shareholders.

The major components include:

The balance sheet primacy in banking has practical implications for every aspect of FIG work:

Modeling: When building a bank model or DDM, you start with balance sheet growth assumptions (loan growth rate, deposit growth rate, securities portfolio changes), then derive NII from the projected earning asset base and funding cost assumptions. This is the reverse of corporate modeling where you start with revenue.

M&A analysis: In bank mergers, the pro forma balance sheet (combined assets, combined deposits, combined loan portfolios) is the starting point. You calculate pro forma regulatory capital ratios from the combined balance sheet, assess TBV dilution from goodwill creation, and project the combined income statement from the merged asset and liability base. The deal's feasibility is determined by balance sheet metrics (capital ratios, TBV dilution) before income statement metrics (EPS accretion) are even considered.

Risk assessment: Bank risk is balance sheet risk. Credit risk lives in the loan portfolio. Interest rate risk lives in the duration mismatch between assets and liabilities. Liquidity risk lives in the deposit composition and wholesale funding dependence. Concentration risk lives in the geographic and sector composition of the loan book. Every risk analysis begins with the balance sheet.

Stress testing: Federal Reserve stress tests (CCAR/DFAST) and European EBA stress tests both start from the balance sheet. Regulators project how the bank's assets would perform under adverse economic scenarios (unemployment spikes, rate shocks, real estate declines) and whether the resulting credit losses would push capital ratios below minimums. The bank's balance sheet composition, specifically its loan mix, securities duration, and funding structure, determines how severe the projected losses are. A bank with 40% CRE exposure will fare worse under a real estate stress scenario than one with 10%, and that difference shows up directly in the pro forma capital ratios that determine whether the bank passes or fails.