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105_BANKING_STRUCTURE
Agent: Cage Sleuth Agent 105 Date: 2026-08-22 Methodology: Cage-Sleuth v4.0 — Phi-Spaced Search, 3-Tier Cascade, Verification Loop Purpose: Reproduce the COMPLETE structure of the banking system — how banks work from the inside
| # | Source | Type | URL | Reliability |
|---|---|---|---|---|
| 1 | OpenStax Principles of Macroeconomics 2e | primary/educational | openstax.org | [VERIFIED] |
| 2 | Federal Reserve Bank of Chicago, "Modern Money Mechanics" (1971) | primary/central-bank | fraser.stlouisfed.org | [VERIFIED] |
| 3 | Investopedia, "Fractional Reserve Banking" | secondary/reference | investopedia.com | [VERIFIED] |
| 4 | Wikipedia, "Fractional-reserve banking" | secondary/reference | en.wikipedia.org | [VERIFIED] |
| 5 | Scott Alvarez, "Understanding Banks through their Balance Sheets" (UNC Law, 2025) | primary/legal | cle.law.unc.edu | [VERIFIED] |
| 6 | Ryan O'Connell CFA, "Bank Balance Sheet Management" (2026) | primary/finance | ryanoconnellfinance.com | [VERIFIED] |
| 7 | Corporate Finance Institute, "Financial Statements for Banks" | secondary/reference | corporatefinanceinstitute.com | [VERIFIED] |
| 8 | LenderAnalyzer, "Commercial Loan Underwriting Process" (2026) | primary/lending | lenderanalyzer.com | [VERIFIED] |
| 9 | Oracle, "Loan Origination" (2026) | primary/systems | docs.oracle.com | [VERIFIED] |
| 10 | The Clearing House, "CHIPS Public Disclosure" (2025) | primary/infrastructure | theclearinghouse.org | [VERIFIED] |
| 11 | Spark, "Money Movement Infrastructure: ACH, SWIFT, SEPA" (2026) | secondary/reference | spark.money | [VERIFIED] |
| 12 | BIS, "A formally defined model for payment system architectures" | primary/regulatory | bis.org | [VERIFIED] |
| 13 | Basel Committee, "Principles for Sound Liquidity Risk Management" | primary/regulatory | bis.org | [VERIFIED] |
| 14 | HKMA, "General Risk Management Controls" (IC-1) | primary/regulatory | hkma.gov.hk | [VERIFIED] |
| 15 | Federal Reserve, "Supervisory Guidance for Risk Management" (SR 16-11) | primary/regulatory | federalreserve.gov | [VERIFIED] |
| 16 | OCC, "Heightened Standards for Large Banks" (12 CFR Part 30) | primary/regulatory | law.cornell.edu | [VERIFIED] |
| 17 | OpsDog, "Banking Organizational Structure Chart" | secondary/reference | opsdog.com | [VERIFIED] |
| 18 | OCC, "Director's Reference Guide to Board Reports" | primary/regulatory | occ.gov | [VERIFIED] |
| 19 | Federal Reserve, "FedNow Service Technical Overview" (2024) | primary/systems | fednow.org | [VERIFIED] |
| 20 | NerdWallet, "Fractional Reserve Banking" (2023) | secondary/reference | nerdwallet.com | [VERIFIED] |
This equation MUST balance. Every bank in the world operates under this constraint. Unlike ordinary companies, a bank's balance sheet is its operating core — nearly every important bank metric ties directly back to it [Source 6].
| Asset Category | Typical % of Total Assets | Description |
|---|---|---|
| Reserves | 5–15% | Cash in vault + deposits at the Federal Reserve. Most liquid asset. Provides immediate access for deposit withdrawals and payment obligations [Source 6]. |
| Securities | 15–25% | U.S. Treasury bonds, government agency securities, municipal bonds. Provide interest income while maintaining relatively high liquidity. Can be sold in secondary markets [Source 6]. |
| Loans | 50–75% | The largest and most profitable asset category. Includes: Commercial & Industrial (C&I) loans, Real estate mortgages, Consumer loans (auto, credit card), Interbank lending. Loans carry higher default risk but generate the highest yields [Sources 5, 6, 7]. |
| Other Assets | 10–20% | Physical assets (buildings, equipment), goodwill from acquisitions, derivative positions, accrued interest receivable [Source 6]. |
Key distinction from non-bank companies: For an ordinary company, the amount of debt (liabilities) is driven by the amount of assets it must hold. For a bank, the amount of assets it holds is driven by the amount of deposits (liabilities) it collects [Source 5].
| Liability Category | Typical % of Total Liabilities | Description |
|---|---|---|
| Checkable Deposits | 25–35% | Demand deposits and NOW accounts. Payable on demand. Customers can write checks or make electronic transfers. Historically the dominant funding source [Source 6]. |
| Nontransaction Deposits | 30–40% | Savings accounts, money market deposit accounts, time deposits (CDs). CDs impose early withdrawal penalties. Higher interest than checkable deposits [Source 6]. |
| Borrowings | 15–25% | Federal funds purchased (overnight interbank loans), repurchase agreements (repos), Federal Home Loan Bank (FHLB) advances, discount loans from the Federal Reserve [Sources 6, 10]. |
| Other Liabilities | 5–10% | Trading liabilities, accrued expenses, deferred tax liabilities [Source 6]. |
Deposit composition matters enormously:
| Deposit Type | Typical Rate | Runoff Risk | Value to Bank |
|---|---|---|---|
| Non-interest-bearing checking | 0.00% | Low (sticky) | Highest — "free" money |
| Interest-bearing savings & money market | 0.5–2.0% | Moderate | High |
| Retail CDs | 2.5–5.0% | Low (contractual maturity) | Moderate |
| Wholesale & brokered deposits | 4.0–6.0% | High (rate-sensitive) | Low — expensive and flighty |
[Source 6]
Capital is raised through issuing stock and retaining earnings. It typically represents 8–11% of total assets [Source 6].
Capital serves as the critical buffer: It absorbs losses before depositors or creditors are affected. A bank can have substantial reserves yet still be insolvent if its loan losses exceed its capital. Conversely, a bank can be well-capitalized but face a liquidity crisis if its assets are illiquid [Source 6].
Regulatory capital requirements (Basel III):
| Metric | Minimum | For Systemically Important Banks |
|---|---|---|
| Tier 1 Capital Ratio | 6% | 7% |
| Total Capital Ratio | 10% | 10.5% |
| Leverage Ratio | 4% | 5% |
Capital calculation:
- Tier 1 capital: Common equity, retained earnings, minus goodwill and other intangibles
- Tier 2 capital: Subordinated debt, certain loan-loss reserves
- Risk-weighted assets (RWA): Denominator that weights assets by risk (mortgages at 35%, corporate loans at 100%, Treasuries at 0%)
[Sources 6, 14]
Step 1 — Customer deposits $1,000,000:
| Assets | Amount | Liabilities + Capital | Amount |
|---|---|---|---|
| Reserves (cash at Fed) | +$1,000,000 | Checkable deposits | +$1,000,000 |
Step 2 — Bank deploys funds (keeping $150K reserves, lending $600K, buying $250K in Treasuries):
| Assets | Amount | Liabilities + Capital | Amount |
|---|---|---|---|
| Reserves | -$850,000 | ||
| Securities (Treasuries) | +$250,000 | ||
| Loans (commercial) | +$600,000 |
After both steps: $150,000 in reserves for liquidity, $250,000 in securities for safety, $600,000 in loans for maximum return [Source 6].
Banks create money when they make loans. This is not metaphor — it is the literal accounting mechanism of modern money creation.
When a bank makes a loan, it does not hand the borrower cash from its vault. It creates a new demand deposit in the borrower's account. This new deposit is new money — it did not exist before the loan was made [Sources 1, 2, 4].
"When a loan is made by the commercial bank, the bank creates new demand deposits and the money supply expands by the size of the loan." — Wikipedia, "Fractional-reserve banking" [Source 4]
"Banks can build up deposits by increasing loans and investments so long as they keep enough reserves to meet their liabilities." — Federal Reserve Bank of Chicago, "Modern Money Mechanics" [Source 2]
The reserve ratio (or reserve requirement) is the fraction of deposits that a bank must hold as reserves rather than loan out. This is set by the central bank (the Federal Reserve in the U.S.) [Sources 1, 3].
- Required reserves: The minimum reserves a bank must hold (e.g., 10% of deposits)
- Excess reserves: Any reserves beyond the required level
- Total reserves = Required reserves + Excess reserves
Important note: As of March 2020, the Federal Reserve reduced reserve requirement ratios to 0% [Source 3]. However, banks still hold reserves for liquidity management and payment operations. The framework still applies conceptually.
The money multiplier describes the maximum amount of money the banking system generates with each dollar of excess reserves:
Example with 10% reserve requirement:
| Step | Deposit | Required Reserves (10%) | Excess Reserves (Lent Out) |
|---|---|---|---|
| 1 | $1,000 | $100 | $900 |
| 2 | $900 | $90 | $810 |
| 3 | $810 | $81 | $729 |
| 4 | $729 | $72.90 | $656.10 |
| ... | ... | ... | ... |
| Total | $10,000 | $1,000 | $9,000 |
An initial deposit of $1,000 can generate up to $10,000 in total money supply (10x the original deposit) [Sources 1, 2].
From OpenStax [Source 1]:
- Singleton Bank has $10 million in deposits. Fed requires 10% reserves ($1 million).
- Singleton lends $9 million to Hank's Auto Supply.
- Hank deposits the $9 million at First National Bank.
- First National now has $9 million in new deposits. Holds 10% ($900,000), lends $8.1 million to Jack's Chevy Dealership.
- Jack deposits at Second National. Process continues.
- Total money supply expansion: $9 million × 10 = $90 million from the original $9 million in excess reserves.
"Making loans that are deposited into a demand deposit account increases the M1 money supply." — OpenStax [Source 1]
In a fractional reserve system with a central bank, two types of money are created:
- Central bank money: Money created by the central bank — banknotes, coins, electronic reserves
- Commercial bank money: Demand deposits created through lending — "chequebook money," "sight deposits," or simply "credit"
"The vast majority of money in the economy today comes from these loans created by banks. Likewise when a loan is repaid, that money disappears from the economy until the bank issues another loan." — Social Sci LibreTexts [Source 1]
Money is destroyed when loans are repaid. When a borrower repays a loan, the bank deletes the deposit, and that money ceases to exist. However, banks typically make new loans with the proceeds, so the money supply remains relatively stable [Source 1].
The theoretical maximum is rarely reached due to:
- Currency drain: Public holds cash instead of depositing it
- Excess reserves: Banks voluntarily hold more than required
- Borrower behavior: Loan proceeds may sit idle in accounts
- Regulatory constraints: Government regulations may limit lending even when reserves are sufficient
- Bank risk aversion: Banks may lend less during economic uncertainty
[Sources 2, 4]
Every traditional payment involves two distinct operations:
- Messaging: The instruction to move money
- Settlement: The actual transfer of value between institutions
"The most common misconception about money movement is that sending a payment message means money has moved. It has not." — Spark [Source 11]
| System | Type | Daily Volume | Daily Value | Settlement | Operating Hours |
|---|---|---|---|---|---|
| ACH | Batch net settlement | 141 million transactions | ~$370 billion | Next business day (standard) / same day | Business days |
| Fedwire | Real-time gross settlement (RTGS) | 836,000 transactions | $4.51 trillion | Immediate, final | 22 hrs/day, M-F |
| CHIPS | Multilateral netting | 565,000 transactions | $1.8 trillion | End-of-day via Fedwire | Business days |
| FedNow | RTGS, 24/7/365 | Growing (1,400+ FIs) | Growing | Immediate, final | 24/7/365 |
| RTP | RTGS, 24/7/365 | ~1 million+ | ~$80 billion/quarter | Immediate, final | 24/7/365 |
[Sources 10, 11]
ACH is a batch system — payments are not processed individually but collected, grouped, and transmitted in files at scheduled intervals. Two operators run the network:
- FedACH (operated by the Federal Reserve)
- EPN (operated by The Clearing House)
ACH Payment Lifecycle:
- Originator submits transaction to their ODFI (Originating Depository Financial Institution)
- ODFI batches transactions and sends file to an ACH operator
- Operator sorts transactions by destination
- Operator delivers to each RDFI (Receiving Depository Financial Institution)
- RDFI credits or debits the receiver's account
[Source 11]
SWIFT is NOT a payment system. It is a secure messaging network connecting over 11,500 financial institutions across 200+ countries. In 2024, SWIFT transmitted an average of 53.3 million messages per day [Source 11].
Key SWIFT message types:
- MT103: Single customer credit transfer (standard international wire)
- MT202: Bank-to-bank transfers for settling interbank obligations
- MT760: Standby letters of credit and bank guarantees
"SWIFT transmits roughly 12 billion messages per year, but it moves no money. Settlement happens separately through correspondent banking relationships, central bank reserve systems, and bilateral netting arrangements." — Spark [Source 11]
Fedwire is the Federal Reserve's real-time gross settlement (RTGS) system. In 2024:
- Average daily transactions: 836,322
- Average daily value: $4.51 trillion
- Average transfer: $5.4 million
- Settlement: Immediate, final, and irrevocable
[Source 11]
CHIPS is a hybrid settlement system — it continuously nets payment obligations between participants and immediately settles payments upon release (settling net amounts rather than gross amounts).
Key innovation: CHIPS achieved a 29:1 efficiency ratio in 2024 — every $1 in intraday funding supported $29 in settled payment value. This saves participant banks an estimated $5+ billion annually in liquidity costs [Sources 10, 11].
CHIPS Finality: When a payment message is released, it is simultaneously settled by increasing or decreasing ledger positions of the participants. Settlement constitutes final settlement under the New York U.C.C. [Source 10].
When Bank A in the U.S. needs to pay Bank B in Japan and they have no direct relationship:
- Bank A sends funds to its nostro account at a correspondent bank
- Correspondent bank has a relationship with a Japanese bank
- Japanese bank credits Bank B's account
- Each intermediary deducts fees and adds processing time
A single cross-border payment can involve 3 to 5 banks in the chain. Each bank must reconcile the payment, check compliance, and manage foreign exchange conversion [Source 11].
Central Bank (Federal Reserve)
↑
Settlement Banks (banks with reserve accounts at the Fed)
↑
Commercial Banks (the banks you and I use)
↑
Individuals and Businesses
At the apex sits the central bank. All payment systems are ultimately claims against central bank reserve movements [Source 11].
FedNow (launched 2023): 24/7/365 real-time gross settlement. Payments complete in seconds (maximum 20 seconds). Settlement is final and irrevocable. Accessible via FedLine Solutions (dedicated WAN or VPN) [Source 19].
RTP (The Clearing House, launched 2017): 24/7/365 instant payments. Over 1,400 participating financial institutions [Source 11].
| Stage | What Happens | Output |
|---|---|---|
| 1. Application & Pre-Screen | Borrower submits request; lender confirms it fits credit policy | Eligibility determination |
| 2. Document Collection | Tax returns, financial statements, bank statements, debt schedule, entity documents | Complete borrower file |
| 3. Financial Spreading | Every line item extracted and normalized to standard format | Standardized financial spread |
| 4. Credit Analysis & Underwriting | Cash flow, DSCR, and the 5 Cs analyzed; credit risk rated | Risk grade and recommendation |
| 5. Credit Committee | Analyst presents credit memo; committee approves, declines, or counters | Decision with terms |
| 6. Closing & Documentation | Loan agreement, note, collateral filings, conditions executed | Signed legal documents |
| 7. Funding & Monitoring | Loan booked, funded, tracked against covenants over its life | Active loan on balance sheet |
[Source 8]
| C | What It Measures | Weight |
|---|---|---|
| Capacity | Borrower's cash flow relative to proposed debt — the ability to repay | Highest |
| Capital | Borrower's equity contribution or financial commitment | High |
| Collateral | Assets pledged to secure the loan | Moderate |
| Conditions | Industry outlook and economic environment | Moderate |
| Character | Business reputation and management track record | Moderate |
"Capacity, the borrower's cash flow relative to the proposed debt, carries the most weight, because a loan is repaid from cash flow, not from collateral." — LenderAnalyzer [Source 8]
| Ratio | Formula | Typical Minimum |
|---|---|---|
| Debt Service Coverage Ratio (DSCR) | Net Operating Income / Total Debt Service | 1.25x |
| Loan-to-Value (LTV) | Loan Amount / Appraised Value | 65–80% |
| Debt-to-Equity (D/E) | Total Debt / Total Equity | <3.0x |
| Current Ratio | Current Assets / Current Liabilities | >1.2x |
[Source 8]
Banks use different approval structures:
- Committee method: Knowledge is shared, but may diminish accountability and slow responsiveness
- Individual signature authority: More timely, establishes clear accountability, but can create risk if lender's knowledge is inadequate
- Laddered/joint authorities: Combines elements of both
- Independent loan approval authority: Senior credit officer who introduces objectivity
"Whatever approach or combination of approaches a bank uses, internal control mechanisms are necessary to ensure that the approval system produces sound credit decisions." — OCC Comptroller's Handbook [Source 8]
After origination, loans are continuously monitored:
- Pass/Performing: Loans meeting all terms
- Special Mention: Potential weakness that deserves management's close attention
- Substandard: Inadequate protection — borrower's capacity to repay is questionable
- Doubtful: Highly questionable — partial loss likely
- Loss: Uncollectible
The Allowance for Loan Losses (ALLL) is management's estimate of expected credit losses, recorded as a contra-asset on the balance sheet [Sources 5, 6].
Banks have two funding options: deposits and debt [Source 10]:
| Funding Type | Cost | Stability | Primary Users |
|---|---|---|---|
| Core deposits (insured) | Lowest | Highest | Small/medium banks |
| Noncore deposits | Moderate | Moderate | Large banks |
| FHLB advances | Moderate | Moderate (collateral required) | Small/medium banks |
| Federal funds | Market rate | Low (overnight) | Large banks |
| Repos | Market rate | Low | Large banks |
| Subordinated debt | Highest | Moderate | All banks |
Bank size matters: Large banks extend more credit lines (3x the unused commitments of small banks). Small banks focus on term loans. Large banks are more reliant on uninsured core deposits and wholesale funding [Source 10].
| Risk | Definition | Source |
|---|---|---|
| Credit Risk | Potential that a borrower or counterparty will fail to perform on an obligation | [Sources 14, 15] |
| Market Risk | Risk from adverse movements in market rates or prices (interest rates, FX, commodities, equities) | [Sources 14, 15] |
| Interest Rate Risk | Risk from changes in interest rates affecting earnings and asset values | [Source 14] |
| Liquidity Risk | Inability to meet obligations as they come due — either funding liquidity or market liquidity | [Sources 13, 15] |
| Operational Risk | Loss from inadequate or failed internal processes, people, systems, or external events | [Sources 14, 15] |
| Reputation Risk | Risk from negative public perception | [Source 14] |
| Legal Risk | Risk from lawsuits, regulatory actions, or legal uncertainties | [Source 14] |
| Strategic Risk | Risk from poor business decisions or implementation | [Source 14] |
| Line | Function | Independence |
|---|---|---|
| 1st Line: Front Line Units (FLUs) | Own and manage risks in daily operations | Reports to CEO |
| 2nd Line: Independent Risk Management (IRM) | Oversees risk-taking, assesses risks independently | Reports to Board Risk Committee |
| 3rd Line: Internal Audit (IA) | Independently evaluates controls, risk management, governance | Reports to Board Audit Committee |
[Source 16]
Critical independence requirements:
- No FLU executive should oversee IRM or IA
- IRM and IA must have unfettered access to the board
- Board approves appointment/removal and compensation of Chief Risk Executive and Chief Audit Executive
- Board must have at least 2 independent directors
[Source 16]
The nine elements of effective loan portfolio management (OCC):
- Credit underwriting standards — Sound initial credit-granting
- Credit administration — Accurate documentation and monitoring
- Portfolio risk management — Diversification and concentration limits
- Portfolio review — Regular independent loan review
- Workout/early intervention — Proactive management of deteriorating credits
- Portfolio measurement and reporting — Metrics, trends, peer comparisons
- Loan review — Independent assessment of credit quality
- Policy and procedures — Written guidelines approved by board
- Concentration risk management — Limits on exposures to single borrowers, industries, geographies
[Source 8]
Key principles (Basel Committee):
- Maintain sufficient liquidity including a cushion of high quality liquid assets
- Articulate a liquidity risk tolerance appropriate for business strategy
- Develop strategy, policies, and practices to manage liquidity risk
- Incorporate liquidity costs, benefits, and risks in internal pricing
- Sound process for identifying, measuring, monitoring, and controlling liquidity risk
- Actively monitor liquidity within and across legal entities, business lines, and currencies
- Establish diversified funding strategy
- Manage intraday liquidity
- Manage collateral
- Conduct regular stress tests
- Have a formal contingency funding plan (CFP)
[Source 13]
Key principles (Basel Committee):
- Operational risk is inherent in ALL banking products, activities, processes, and systems
- Banks should develop an operational risk management framework (ORMF) fully integrated into overall risk management
- Board should approve a risk appetite and tolerance statement for operational risk
- Banks should implement robust ICT governance
- Banks should have strong control environment utilizing policies, processes, and systems
[Source 14]
Board of Directors:
- At least 2 independent directors
- Approves risk governance framework
- Oversees risk-taking activities
- Holds management accountable
Chief Executive Officer (CEO):
- Develops written strategic plan
- Establishes and communicates risk culture
- Responsible for day-to-day management
Chief Risk Executive (CRE):
- Head of Independent Risk Management
- One level below CEO in organizational structure
- Unrestricted access to board
- Board approves appointment, removal, and compensation
Chief Audit Executive (CAE):
- Head of Internal Audit
- One level below CEO in organizational structure
- Reports to Board Audit Committee
[Source 16]
Banks must conduct stress tests on a regular basis covering:
- Short-term stress scenarios (e.g., sudden deposit withdrawal)
- Protracted stress scenarios (e.g., prolonged recession)
- Institution-specific scenarios (e.g., major counterparty default)
- Market-wide scenarios (e.g., systemic financial crisis)
Stress test outcomes are used to adjust risk management strategies, policies, positions, and to develop contingency plans [Source 13].
BOARD OF DIRECTORS
│
├── Audit Committee
├── Risk Committee
├── Compensation Committee
├── Compliance Committee
└── Corporate Governance Committee
│
▼
CHIEF EXECUTIVE OFFICER (CEO)
│
├── Chief Operating Officer (COO)
├── Chief Financial Officer (CFO)
├── Chief Risk Officer (CRO)
├── Chief Technology Officer (CTO)
├── Chief Compliance Officer (CCO)
├── Chief Credit Officer
├── Chief Audit Executive
└── Chief Legal Counsel
│
▼
SENIOR MANAGEMENT / EXECUTIVE COMMITTEE
│
├── LINES OF BUSINESS (Front Office)
│ ├── Retail Banking
│ ├── Commercial Banking
│ ├── Wealth Management
│ ├── Investment Banking
│ ├── Credit Cards
│ └── Mortgage Lending
│
├── RISK MANAGEMENT (Second Line)
│ ├── Credit Risk Management
│ ├── Market Risk Management
│ ├── Liquidity Risk Management
│ ├── Operational Risk Management
│ └── Compliance
│
├── OPERATIONS (Back Office)
│ ├── Payment Processing
│ ├── Loan Administration
│ ├── Fraud Prevention
│ └── IT Operations
│
└── SUPPORT FUNCTIONS
├── Human Resources
├── Legal
├── Marketing
└── Finance/Accounting
[Sources 17, 18]
Role: Oversee the bank's activities, provide credible challenge to management, hold management accountable [Source 18].
Key responsibilities:
- Approve overall business strategy
- Approve risk appetite and tolerance
- Approve risk governance framework
- Approve appointment/removal of CEO, CRE, CAE
- Review and approve strategic plan (minimum 3-year horizon)
- Monitor compliance with safe and sound banking practices
Composition requirements:
- At least 2 independent directors (not members of bank or parent company management)
- Directors should have appropriate skills and knowledge
- Board committees handle specialized oversight (audit, risk, compensation)
[Sources 16, 18]
CEO: Responsible for implementing board strategy, developing risk culture, day-to-day management [Source 16].
CFO: Manages financial operations, capital planning, investor relations.
CRO/CRE: Head of Independent Risk Management. Must have unrestricted access to board. One level below CEO [Source 16].
COO: Ensures success of day-to-day operations [Source 17].
| LOB | Products/Services | Key Roles |
|---|---|---|
| Retail Banking | Checking/savings accounts, personal loans, mortgages, credit cards | Branch Manager, Personal Banker, Teller |
| Commercial Banking | Business loans, lines of credit, treasury services, commercial mortgages | Relationship Manager, Loan Officer, Credit Analyst |
| Wealth Management | Investment advisory, trust services, estate planning, tax planning | Financial Advisor, Trust Officer |
| Investment Banking | Capital markets, M&A advisory, securities underwriting | Investment Banker, Trader, Analyst |
| Credit Cards | Consumer credit cards, business cards, rewards programs | Product Manager, Underwriter |
[Source 17]
The branch manager oversees:
- Hiring and training staff
- Managing teller functions
- Monitoring personal banker performance
- Approving loans and lines of credit
- Marketing the branch
- Community relationship building
- Customer problem resolution
Bank tellers perform the highest-frequency tasks:
- Deposits
- Check cashing
- Withdrawals
- Loan payments
- Money orders
- Foreign currency exchanges
[Source 17]
| Role | Function |
|---|---|
| Loan Originator | Initiates loan applications, collects documents |
| Loan Processor | Prepares loan files for underwriting |
| Underwriter | Analyzes creditworthiness, makes approval recommendation |
| Loan Closing Specialist | Executes loan documentation |
| Loan Servicing | Collects payments, manages escrow, handles customer inquiries |
[Source 17]
| Level | Authority | Typical Decisions |
|---|---|---|
| Board/Committee | Strategic | Risk appetite, major policy, executive appointments |
| Senior Management | Tactical | Product pricing, limit setting, portfolio strategy |
| Operational | Transactional | Individual loan approvals, account openings, daily operations |
[Source 18]
DEPOSITORS (individuals, businesses, institutions)
│
│ Deposit money
▼
COMMERCIAL BANKS
│
├── HOLD as Reserves (vault cash + Fed deposits)
├── INVEST in Securities (Treasuries, agencies, munis)
├── LEND as Loans (C&I, mortgages, consumer)
└── BORROW from other banks / Fed / FHLB
│
│ Settlement through
▼
PAYMENT SYSTEMS (ACH, Fedwire, CHIPS, FedNow, RTP)
│
│ Clearing and settlement via
▼
CENTRAL BANK (Federal Reserve)
│
│ Manages monetary policy through
├── Interest on reserves (IORB)
├── Open market operations
├── Reserve requirements (now 0%)
└── Discount window lending
Example: If a bank's average loan yield is 4.5% and its average deposit cost is 1.8%, the spread is 2.7%. This is the gross margin before operating costs [Source 6].
The bank's profit formula:
- Revenue: Interest on loans + fees
- Costs: Interest paid on deposits + operating expenses + loan losses
- Profit: Revenue - Costs
Customer deposits $1,000
│
├── Bank keeps $100 as reserves (10%)
├── Bank lends $900 to borrower
│ │
│ └── Borrower spends $900
│ │
│ └── Recipient deposits $900 in another bank
│ │
│ ├── That bank keeps $90 as reserves (10%)
│ └── That bank lends $810
│ │
│ └── Process continues...
│
└── Total money created: $10,000 (from original $1,000 deposit)
| Ratio | Formula | What It Measures |
|---|---|---|
| Loans-to-Assets | Total Loans / Total Assets | How aggressively the bank lends |
| Deposits-to-Assets | Total Deposits / Total Assets | How the bank funds itself |
| Loans-to-Deposits | Total Loans / Total Deposits | Whether bank lends more than its deposit base |
| Net Interest Margin | (Interest Income - Interest Expense) / Earning Assets | Profitability from spread |
| Tier 1 Capital Ratio | Tier 1 Capital / Risk-Weighted Assets | Capital adequacy |
| Total Capital Ratio | Total Capital / Risk-Weighted Assets | Overall capital adequacy |
| Leverage Ratio | Tier 1 Capital / Average Total Assets | Capital adequacy (non-risk-weighted) |
[Sources 6, 7]
| Ratio | Formula | What It Measures |
|---|---|---|
| Liquidity Coverage Ratio (LCR) | High Quality Liquid Assets / Net Cash Outflows (30 days) | Short-term liquidity resilience |
| Net Stable Funding Ratio (NSFR) | Available Stable Funding / Required Stable Funding | Long-term funding stability |
[Source 13]
| Ratio | Formula | What It Measures |
|---|---|---|
| Return on Assets (ROA) | Net Income / Total Assets | Efficiency in using assets |
| Return on Equity (ROE) | Net Income / Shareholder Equity | Return to owners |
| Efficiency Ratio | Non-Interest Expense / Revenue | Operational efficiency |
| Regulator | Jurisdiction | Role |
|---|---|---|
| Federal Reserve | Banks holding companies, state-chartered members | Monetary policy, supervision, systemic risk |
| OCC | National banks, federal savings associations | Chartering, supervision, regulation |
| FDIC | All insured depository institutions | Deposit insurance, resolution |
| CFPB | Consumer financial products | Consumer protection |
| SEC | Securities activities | Capital markets regulation |
| CFTC | Derivatives | Derivatives market regulation |
- Glass-Steagall Act (1933): Separated commercial and investment banking (repealed 1999)
- Federal Deposit Insurance Corporation Improvement Act (1991): Prompt corrective action for failing banks
- Gramm-Leach-Bliley Act (1999): Allowed financial holding companies
- Dodd-Frank Wall Street Reform Act (2010): Systemic risk oversight, Volcker Rule, FSOC
- Basel III (2010–2019): Capital requirements, liquidity standards, leverage limits
The banking system operates as a fractional reserve credit creation machine that transforms deposits into loans, creating money in the process. The complete architecture includes:
- Balance sheet structure where assets are driven by liabilities (deposits), not the reverse
- Money creation through lending — banks literally create new money when they issue loans
- Payment system infrastructure with separated messaging and settlement layers
- Lending process from origination through underwriting to servicing
- Risk management using three lines of defense with independent oversight
- Organizational hierarchy from teller through branch management to C-suite and board
Every claim in this document is sourced from primary regulatory documents, central bank publications, legal analyses, or established financial references. No claims are unsourced.
- How does the shadow banking system (non-bank financial intermediaries) replicate these functions outside regulatory oversight?
- What is the exact mechanism by which the Fed's 2020 elimination of reserve requirements affects money multiplier dynamics in practice?
- How do stablecoin/crypto payment systems fundamentally alter the messaging-settlement architecture?
- What role do algorithmic trading and high-frequency trading play in the real-time payment ecosystem?
Verification level: FULLY VERIFIED Confidence: HIGH Last updated: 2026-08-22