2. Financial Institutions
Depository Institutions: Fundamentals and Economic Functions
Definition of Depository Institutions:
A depository institution is a financial firm that accepts monetary deposits from households and businesses and subsequently uses those accumulated funds to extend loans to other households and businesses.
These institutions form a fundamental component of the financial system by facilitating the circulation of money throughout the economy rather than merely keeping physical currency stored in vaults.
Funds gathered from depositors are actively directed toward issuing loans, investing in financial assets, and delivering financial services that bolster macroeconomic activity.
Primary Categories of Depository Institutions:
Deposits that count as money within the economy originate from three primary categories of depository institutions:
Commercial Banks: Financial institutions that offer a broad spectrum of deposit accounts, loans, and financial services to individuals and businesses.
Thrift Institutions: Savings institutions that historically focus on consumer savings and home mortgages, including savings and loan associations, mutual savings banks, and credit unions.
Money Market Mutual Funds: Investment funds that pool resources from individuals and institutions to invest in high-quality, short-term debt securities while issuing shares that can function like deposit accounts.
Operational Objective and the Profit Mechanism:
The overarching objective of any banking institution is to maximize the wealth of its owners and shareholders.
To accomplish this goal, banks charge a higher interest rate on the funds they lend out than the interest rate they offer and pay to depositors on their accounts.
The spread between the lending interest rate and the deposit interest rate is designated as the interest rate spread.
The interest rate spread represents the primary mechanism through which commercial banks generate profits.
Prudence and Liquidity Management:
Banks must balance the pursuit of profit with operational prudence.
Institutions must maintain adequate liquidity so that depositors have immediate access to their funds upon demand, while simultaneously originating a sufficient volume of loans to produce ongoing interest income.
Asset Management and Funding in Commercial Banks
Four Asset Categories of Commercial Banks:
Commercial banks allocate and structure their holdings across four distinct categories of assets:
Cash Assets:
Physical currency, consisting of notes and coins stored directly inside bank vaults.
Bank deposits and reserve balances maintained at the Federal Reserve.
Securities:
Short-term financial instruments, which include U.S. Treasury bills and commercial bills.
Longer-term financial assets, including government bonds and mortgage-backed securities ().
Loans:
Contractual agreements involving fixed sums of money advanced to households and non-financial businesses.
Common uses include residential financing (home mortgages), consumer goods financing, and commercial loans for purchasing business capital equipment.
Other Assets:
Miscellaneous physical and financial holdings required to sustain day-to-day corporate operations, such as bank-owned real estate, IT infrastructure, and specialized equipment.
Asset and Funding Distribution (June 2021 Benchmark):
Asset Distribution Relative to Deposits:
Cash assets accounted for of deposits.
Securities accounted for of deposits.
Loans represented of deposits.
Other assets totaled approximately of deposits.
Funding Capital Structure:
The sum of the percentages relative to deposits exceeds () because customer deposits are not the sole source of funding utilized by commercial banks.
Commercial banks supplement deposit liabilities by borrowing funds on the financial markets and leveraging their own equity capital.
External borrowing and bank equity together constitute approximately of a commercial bank's aggregate funding base.
Economic Benefits of Depository Institutions
Creation of Liquidity:
Under normal circumstances, long-term financial assets such as residential mortgages or fixed-income bonds are difficult to convert rapidly into liquid cash without incurring significant losses.
Depository institutions pool these illiquid assets and finance them using liquid deposit accounts, allowing depositors continuous, on-demand access to their cash.
Liquidity Crises and Bank Runs:
A bank run occurs when a sudden wave of depositors attempts to withdraw their money simultaneously due to fears of insolvency.
Because banks invest deposit funds into long-term loans and securities, their vault cash represents only a fraction of total deposits; thus, an institution can be fully solvent on paper (assets exceed liabilities) yet fail due to an inability to satisfy instant cash withdrawal demands.
Cultural and Historical Illustration: In the film It's a Wonderful Life (starring Jimmy Stewart), a classic bank run demonstrates how a solvent institution with sound mortgage assets lacks the immediate physical currency necessary to meet all customer withdrawals at once.
Widespread bank runs were a defining feature of the Great Depression, contributing directly to the severity and duration of the economic collapse.
During the 2008 financial crisis, the Federal Reserve intervened aggressively to provide systemic liquidity and prevent similar runs across modern financial institutions.
Lowering the Cost of Borrowing:
Depository institutions act as central financial intermediaries, dramatically simplifying the process of connecting savers (lenders) with borrowers.
This intermediation substantially lowers the transaction and search costs associated with finding counterparties for loan agreements.
Lowering the Cost of Monitoring Borrowers:
Evaluating creditworthiness, evaluating project risk, and monitoring debt repayment requires specialized expertise, time, and administrative costs.
Depository institutions specialize in underwriting credit and tracking performance, eliminating the need for individual retail depositors to monitor the specific borrowers using their pooled funds.
Risk Pooling:
Financial institutions diversify their loan portfolios across thousands of independent borrowers.
If a specific borrower defaults on an obligation, the resulting financial loss is absorbed across the bank's broad balance sheet and its entire deposit base rather than falling entirely upon an individual saver.
The Federal Reserve System: Structure and Policy Mandates
Identity and Mission of the Fed:
The Federal Reserve System (commonly termed the Fed) serves as the central bank of the United States.
It functions as an independent public authority tasked with regulating depository institutions and governing the total quantity of money in the domestic economy.
Key Macroeconomic Goals:
Maintaining low and stable inflation.
Promoting maximum/full employment.
Moderating cyclical fluctuations in the business cycle.
Supporting sustained, long-term economic growth.
Policy Trade-offs: These mandates often conflict with one another (e.g., actions taken to reduce inflation can temporarily elevate unemployment or slow short-term growth).
Operational Mechanism (The Federal Funds Rate):
To pursue its policy goals, the Fed targets and influences the federal funds rate.
The federal funds rate is the specific interest rate that commercial depository institutions charge one another on overnight loans of central bank reserves.
Organizational Hierarchy and Governance:
The Board of Governors:
The centralized administrative body at the top of the Federal Reserve System.
Consists of members who are appointed to oversee national monetary policy and regulatory enforcement.
Led by a designated Chair (held by Jerome Powell).
Regional Federal Reserve Banks:
There are decentralized regional Federal Reserve Banks situated in districts across the nation.
The Federal Open Market Committee (FOMC):
The primary policymaking body responsible for determining open market operations and the path of domestic monetary policy.
Composition: Composed of voting members:
The members of the Board of Governors.
The President of the Federal Reserve Bank of New York (permanent voting seat).
of the remaining regional Federal Reserve Bank presidents, who serve as voting members on a one-year rotating schedule.
While all FOMC members cast votes on policy decisions, the Chair of the Federal Reserve typically exercises the greatest influence over deliberations and policy consensus.
The Balance Sheet of the Federal Reserve and the Monetary Base
Structure of the Fed's Balance Sheet:
The balance sheet of the central bank consists of assets and liabilities that directly affect macroeconomic liquidity.
Primary Assets:
U.S. government securities (Treasury bills, notes, and bonds).
Mortgage-backed securities ().
Primary Liabilities:
Federal Reserve Notes (the physical paper currency in public circulation).
Reserves held at the Fed by commercial depository institutions.
Other deposits held by various governmental and international institutions.
The Monetary Base ():
The monetary base constitutes the foundation of the aggregate money supply.
It is defined strictly as the sum of physical currency in circulation and total reserves held by depository institutions:
Discretionary modifications to the size or composition of the monetary base drive broader changes in the overall money supply throughout the banking system.
Sources and Uses of the Monetary Base:
Sources: The Fed's assets (predominantly U.S. government securities and mortgage-backed securities).
When the Fed purchases assets in open market operations, it credits depository institutions with central bank reserves, thereby injecting newly created reserves into the banking system and expanding the monetary base.
Uses: The Fed's liabilities (currency held by the public and bank reserves stored at the Fed).
These liabilities represent the physical currency actively circulating in the marketplace and the reserves that commercial banks possess to support their private lending activities.
Central Bank Balance Sheet Accounting Identity:
For conventional private firms, balance sheet accounts obey the fundamental accounting identity:
For a central bank, equity is theoretically treated as zero ():
Consequently, total central bank assets equal total central bank liabilities, which together represent the quantitative scale of the monetary base.
Historical Balance Sheet Expansions: The 2008 Financial Crisis and the COVID-19 Pandemic
Emergency Balance Sheet Interventions:
During catastrophic economic shocks—specifically the Global Financial Crisis of 2008 and the global COVID-19 pandemic in 2020—the Federal Reserve utilized massive balance sheet expansions to stabilize financial markets and provide emergency credit.
Quantitative Metrics of Expansion:
Asset Growth: Total holdings of U.S. government securities and mortgage-backed securities surged from an initial baseline of under " prior to the crises to more than ".
Currency in Circulation: Currency held by the public climbed from under " to between approximately " and ".
Depository Institution Reserves: Reserves held by commercial banks at the central bank increased significantly, reaching nearly ".
Net Monetary Base Growth: Through these sustained asset purchase operations, the overall monetary base expanded by approximately .
Macroeconomic Impact: This large-scale liquidity injection absorbed distressed assets, insulated the banking system from liquidity failure, restored functionality to secondary debt markets, and supported aggregate demand during periods of profound economic dislocation.