A Brief History of Banking
Banking is older than stock markets, older than corporations, and older than most national governments. The basic function of a bank, accepting deposits and making loans, has remained remarkably consistent for over five centuries. What has changed is the scale, the complexity, and the degree to which banking is intertwined with the broader economy. The history of banking is a history of financial innovation, periodic catastrophe, and the long struggle to balance profit-seeking with stability. Every financial crisis in modern history has, at its core, been a banking crisis.
Ancient and Medieval Origins
Lending at interest is one of the oldest commercial activities in recorded history. Temples in ancient Mesopotamia served as repositories for grain and precious metals, and they extended loans to merchants and farmers. The Code of Hammurabi, dating to roughly 1754 BCE, included regulations on interest rates and the treatment of debtors. Greek and Roman banking evolved from money-changing, as the Mediterranean trade network required merchants to convert between dozens of local currencies.
Medieval banking emerged from the commercial revolution of the 12th and 13th centuries. Italian city-states, particularly Florence, Venice, Genoa, and Siena, were at the center of Mediterranean trade and needed financial services to support long-distance commerce. The word "bank" itself derives from the Italian "banca," the bench or counter where money changers conducted their business.
The Bardi and Peruzzi families of Florence operated the largest banking houses of the early 14th century, financing trade across Europe and lending enormous sums to the English crown. When Edward III of England defaulted on his war debts in the 1340s, both houses collapsed, triggering a financial crisis that cascaded through Florence's economy. It was an early demonstration of a pattern that would repeat across centuries: sovereign default destroying private banks.
The Medici and the Birth of Modern Banking
The Medici Bank, founded by Giovanni di Bicci de' Medici in 1397 and expanded by his son Cosimo, became the most successful banking institution of the Renaissance. The Medici introduced several innovations that shaped modern banking. They developed the system of correspondent banking, establishing branches in Rome, Venice, Milan, Bruges, London, and Avignon, each operated by a local partner. This network allowed merchants to deposit funds in one city and withdraw them in another, eliminating the need to transport gold and silver across dangerous roads.
The Medici also refined the bill of exchange, a written order to pay a specified amount at a future date in a different location. Bills of exchange served simultaneously as instruments of payment, credit, and foreign exchange. They also allowed the Medici to disguise interest charges as exchange rate differentials, circumventing the Church's prohibition on usury. This was not merely a legal technicality. The Church's stance on lending at interest profoundly shaped the development of European finance, driving bankers to create ever more complex instruments to achieve economically identical results without running afoul of canon law.
The Medici Bank declined in the late 15th century under Lorenzo the Magnificent, who was more interested in politics and art than in banking. Bad loans, particularly to the English crown (another royal default), weakened the bank. It finally closed in 1494 when the Medici were expelled from Florence.
The Rise of National Banks
The 17th century brought two innovations that transformed banking: the creation of publicly chartered banks and the emergence of central banking. The Bank of Amsterdam (Wisselbank), founded in 1609, was created by the city government to bring order to the chaotic currency situation in the Dutch Republic, where hundreds of different coins circulated. The bank accepted deposits and provided a stable unit of account for settling commercial transactions. It did not make loans to private parties (at least officially), but it became the most trusted financial institution in Europe and the backbone of Amsterdam's position as the world's commercial capital.
The Bank of England, founded in 1694, was different. It was created explicitly to lend money to the government. William III needed to finance England's war against France, and a group of wealthy merchants and landowners agreed to lend 1.2 million pounds to the crown in exchange for a royal charter and the right to issue banknotes. The Bank of England thus began as a partnership between the government's need for credit and private investors' desire for profit.
Over the following century, the Bank of England evolved into something new: a central bank. It held the government's account, managed the national debt, and gradually assumed responsibility for the stability of the banking system. Its banknotes became the most widely accepted currency in England. During periodic crises, the Bank served as a lender of last resort, providing liquidity to solvent banks that were experiencing temporary runs.
Walter Bagehot, the editor of The Economist, articulated the principles of central banking in his 1873 book "Lombard Street." He argued that in a crisis, the central bank should lend freely, at a high rate of interest, against good collateral. This formula, "lend freely, at a penalty rate, on good collateral," remains the foundational principle of central banking during financial crises.
American Banking: Fragmentation and Instability
The history of banking in the United States was shaped by a deep political suspicion of concentrated financial power. While European nations built centralized banking systems, the United States went through cycles of creating and destroying central banks, as detailed in the history of the Federal Reserve.
After Andrew Jackson killed the Second Bank of the United States in the 1830s, American banking became radically decentralized. Thousands of state-chartered banks operated independently, each issuing its own banknotes. The quality of these notes varied enormously. A note from a well-capitalized New York bank might trade at face value, while a note from a frontier bank in the western territories might be worth 50 cents on the dollar. Counterfeit notes were rampant. "Note detectors," published guides listing the thousands of bank notes in circulation and their relative values, were common reference books.
The National Banking Acts of 1863 and 1864 created a system of nationally chartered banks that issued a uniform currency (national bank notes), but the system still lacked a central bank. The result was a banking system prone to panics. Major banking crises occurred in 1873, 1884, 1893, and 1907. The creation of the Federal Reserve in 1913 addressed the structural problem, but as the Great Depression demonstrated, the existence of a central bank was no guarantee of stability.
The Great Depression and Deposit Insurance
The banking collapse during the Great Depression was the most destructive in American history. Between 1930 and 1933, approximately 9,000 banks failed, wiping out the savings of millions of depositors. At the time, there was no deposit insurance. When a bank failed, depositors simply lost their money, sometimes all of it.
The Banking Act of 1933 (commonly known as the Glass-Steagall Act) addressed this crisis in two fundamental ways. First, it created the Federal Deposit Insurance Corporation (FDIC), which insured bank deposits up to $2,500 (a limit that has been raised repeatedly and stands at $250,000 as of the 2020s). Deposit insurance effectively ended the classic bank run. If depositors knew their money was safe regardless of the bank's condition, they had no reason to rush to withdraw it.
Second, Glass-Steagall separated commercial banking from investment banking. Commercial banks, which accepted deposits and made loans, could no longer underwrite or deal in securities. Investment banks, which underwrote stock and bond offerings, could not accept deposits. The logic was that commercial banks had used depositors' money to speculate in securities, and the resulting losses had destroyed the banks and the savings they held. Separating the two activities was meant to prevent this from recurring.
The Glass-Steagall separation defined American banking for six decades. Banks like Chase Manhattan and Bank of America focused on lending and deposit-taking. Investment banks like Goldman Sachs and Morgan Stanley focused on securities underwriting, trading, and advisory work. The two worlds operated under different regulatory regimes and different business cultures.
Deregulation and Consolidation
Beginning in the 1980s, the strict regulatory framework of the New Deal era was progressively loosened. The Depository Institutions Deregulation and Monetary Control Act of 1980 eliminated interest rate ceilings on deposits, allowing banks to compete more aggressively for funds. The Garn-St. Germain Act of 1982 expanded the lending powers of savings and loan associations (thrifts), setting the stage for the savings and loan crisis of the late 1980s, in which more than 1,000 thrift institutions failed at a cost to taxpayers of roughly $124 billion.
Interstate banking restrictions, which had prevented banks from operating across state lines, were lifted by the Riegle-Neal Act of 1994. This triggered a wave of mergers that transformed American banking from a system of thousands of independent local banks into one dominated by a handful of national and international megabanks. Between 1990 and 2010, the number of FDIC-insured banks in the United States fell from more than 12,000 to roughly 6,500.
The final act of Depression-era deregulation came in 1999, when the Gramm-Leach-Bliley Act repealed the Glass-Steagall provisions separating commercial and investment banking. Banks could now operate as financial supermarkets, combining deposit-taking, securities trading, insurance, and asset management under one corporate umbrella. Citigroup, formed by the 1998 merger of Citicorp (a commercial bank) and Travelers Group (an insurance and brokerage conglomerate), was the poster child for this new model.
The 2008 Crisis
The 2008 financial crisis exposed the risks that had accumulated during the deregulation era. The crisis was, at its core, a banking crisis. Banks and bank-like institutions had made enormous quantities of mortgage loans, many of them to borrowers who could not afford to repay them. These loans were packaged into mortgage-backed securities and sold to investors worldwide. When housing prices fell and borrowers defaulted, the losses cascaded through the financial system.
Bear Stearns, a major investment bank, was rescued by JPMorgan Chase with Federal Reserve support in March 2008. Lehman Brothers was allowed to fail in September 2008, triggering a global panic. The government placed Fannie Mae and Freddie Mac into conservatorship. AIG, the world's largest insurance company, received an $85 billion government loan to prevent its collapse from destroying the counterparties who had purchased credit protection from it.
The Troubled Asset Relief Program (TARP) injected $700 billion into the banking system. The Federal Reserve created emergency lending facilities on an unprecedented scale. The crisis destroyed or absorbed several of the most storied names in American banking. Bear Stearns was gone. Lehman Brothers was gone. Merrill Lynch was absorbed by Bank of America. Wachovia was absorbed by Wells Fargo. Washington Mutual, the largest savings institution in the country, was seized by the FDIC and sold to JPMorgan Chase.
Post-Crisis Banking
The Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 was the most comprehensive financial regulation since the New Deal. It created the Consumer Financial Protection Bureau, imposed the Volcker Rule (limiting proprietary trading by banks), established a framework for resolving failing financial firms without taxpayer bailouts, and required large banks to submit to annual stress tests conducted by the Federal Reserve.
The largest American banks emerged from the crisis bigger than ever. JPMorgan Chase, Bank of America, Citigroup, Wells Fargo, Goldman Sachs, and Morgan Stanley dominate U.S. banking. Their combined assets exceed $12 trillion. They are subject to higher capital requirements, more intensive supervision, and regular stress testing. Whether these measures are sufficient to prevent another systemic crisis is an open question.
The post-crisis era has also seen the rise of financial technology (fintech) companies that offer banking services without traditional bank charters. Digital payments, peer-to-peer lending, and mobile banking have expanded access to financial services and intensified competition. Whether these new entrants represent a fundamental transformation of banking or an incremental evolution of the existing system remains to be seen.
The Constant and the Variable
Banking has survived every crisis in its history by adapting its form while preserving its function. The Medici Bank and JPMorgan Chase are separated by six centuries of financial innovation, regulatory evolution, and technological change. But both perform the same basic operation: they gather money from those who have it and allocate it to those who need it, earning a spread in the process. The history of banking is the history of that spread, the risks taken to earn it, and the consequences when those risks go wrong.
Put these principles into practice. Track fundamentals, build portfolios, and analyze stocks with AI-powered insights.
Start Free on GridOasis →