Study sheet: Financing the Economy and Financial Systems

📋 Course Outline

1. Financial System Architecture
2. Banks and Financial Markets
3. Financial Information and Institutions
4. Global Financial Centres
5. Benefits of Financial Systems
6. Limits of Financial Efficiency
7. Finance, Growth and Risk
8. Financial Crises and Regulation
9. Financial Development and Market Efficiency
10. Market Expectations and Financial Fragility
11. Systemic and Exchange-Rate Crises
12. Financial Regulation and Safety Nets
13. Non-Bank Finance and Inclusion
14. Green and Digital Finance
15. Finance, Innovation and Risk
16. Information Asymmetries and Credit Rationing
17. Finance and Economic Growth
18. Financial Bubbles and Instability

📖 1. Financial System Architecture

🔑 Key Concepts & Definitions

• Financial system : the set of institutions, markets, instruments, infrastructures and rules that allocate financial resources

★ Must-know

📌 An agent has a financing capacity when its saving exceeds its investment, whereas it has a financing need when its investment exceeds its saving.

📌 Internal financing uses an agent’s own resources, indirect external financing passes through financial institutions, and direct external financing connects borrowers and lenders through the issuance of securities. — Gurley et Shaw, Money in a Theory of Finance, 1960

• When a bank grants a loan, it simultaneously creates a deposit and therefore creates scriptural money.

Further detail

• Modern economies use:

  • deposits
  • bonds
  • shares
  • fund units
  • insurance products
  • negotiable securities

• Schumpeter presents the banker as selecting innovative entrepreneurs and giving them access to new purchasing power, so bank credit finances innovation and creative destruction. — Theorie der wirtschaftlichen Entwicklung, 1911

💡 Memory Hook

Capacity to finance versus need for finance

📖 2. Banks and Financial Markets

🔑 Key Concepts & Definitions

• Money market : the market for short-term financing, where banks, large firms, public administrations and some non-bank institutions manage their liquidity
• Securitization : Securitization transforms illiquid claims such as mortgages, consumer loans, automobile loans and business loans into negotiable securities.

★ Must-know

📌 The bond market finances medium- and long-term debt, while the equity market allows firms to raise equity without mandatory repayment.

📌 The primary market issues new securities and directly finances issuers, whereas the secondary market trades existing securities and mainly provides liquidity.

Further detail

• Commodity futures and options allow producers, traders, industrial firms and investors to hedge against price changes, although speculative positions can increase price volatility.

💡 Memory Hook

Primary markets finance issuers; secondary markets provide liquidity

📖 3. Financial Information and Institutions

🔑 Key Concepts & Definitions

• Financial price : A financial price, such as an interest rate, stock price, exchange rate, risk premium or credit spread, guides investment, financing and portfolio decisions.

★ Must-know

• The main participants are:
  • issuers
  • investors
  • investment banks
  • rating agencies
  • trading platforms
  • clearing houses
  • central securities depositories

📌 In bank-oriented systems such as historical Germany and France, banks play a central financing role, whereas in market-oriented systems such as the United States and the United Kingdom, firms rely more on issuing shares and bonds. — Zysman, Governments, Markets, and Growth, 1983

Further detail

• The three main international rating agencies are:
  • S&P Global Ratings
  • Moody’s Investors Service
  • Fitch Ratings

💡 Memory Hook

Issuers → investors → intermediaries → rating agencies → infrastructures

📖 4. Global Financial Centres

★ Must-know

• Recent estimates place finance and insurance at about 8% of US GDP, more than 11% of UK production when associated professional services are included, around 4% of French and German GDP, and 4% to 5% of Japanese GDP.

• A financial centre combines:

  • market depth
  • legal quality
  • political stability
  • liquidity
  • capital access
  • human capital
  • digital infrastructure
  • time-zone advantages
  • reputation

• New York’s financial centrality rests on Wall Street, deep US equity and bond markets, the international role of the dollar, institutional investors and the NYSE and Nasdaq.

Further detail

• The GFCI 39, published in March 2026, ranked New York first, followed by London, Hong Kong and Singapore, with only one point separating each of the four centres.

• London remains a major international centre for foreign exchange, insurance, reinsurance, asset management, derivatives, financial law and professional services despite Brexit.

💡 Memory Hook

A few global hubs connected by flows of capital, information and talent

📖 5. Benefits of Financial Systems

★ Must-know

• The financial system transfers resources through time by allowing households to save for future consumption and firms to invest today in anticipation of future revenues. — Goldsmith, Financial Structure and Development, 1969

📌 Adverse selection occurs before a transaction because riskier borrowers are more likely to seek funds, whereas moral hazard occurs after financing because borrowers may take more risks or misuse the funds. — Akerlof, The Market for Lemons, 1970

• Banks transform maturity and liquidity by granting long-term loans while offering deposits available on demand.

📐 Formula — Tobin’s q is the ratio of a firm’s market value to the replacement cost of its capital, and investment becomes more attractive when $q>1$. — A General Equilibrium Approach to Monetary Theory, 1969

Further detail

📌 Portfolio diversification reduces diversifiable risk, whereas systematic risk cannot be eliminated through diversification and is the risk theoretically rewarded by a higher return.

💡 Memory Hook

Saving and intermediation → investment, risk sharing and growth

📖 6. Limits of Financial Efficiency

🔑 Key Concepts & Definitions

• Market efficiency : Eugene Fama, Efficient Capital Markets, 1970 — the hypothesis that asset prices incorporate all available information

★ Must-know

• The three forms of efficiency are (Eugene Fama, 1970):
  • weak-form efficiency
  • semi-strong efficiency
  • strong-form efficiency

Further detail

• Keynes, Blanchard and Watson, and Shiller show that financial prices may incorporate mimetic expectations, collective narratives and self-fulfilling behaviour rather than only available information.

💡 Memory Hook

Efficient information processing versus self-reinforcing bubbles

📖 7. Finance, Growth and Risk

★ Must-know

• The central functions of finance include (Levine, 1997):
  • information production
  • investment monitoring
  • exchange facilitation
  • saving mobilization
  • risk diversification

📌 Insufficient financial development can constrain investment, whereas excessive financial development can encourage instability, unproductive debt and asset bubbles.

Further detail

• Arcand, Berkes and Panizza argue that beyond a certain threshold, financial development can have a negative effect on economic growth. — Arcand, Berkes et Panizza, Too Much Finance ?, 2015

💡 Memory Hook

More finance → growth up to a threshold, then instability

📖 8. Financial Crises and Regulation

★ Must-know

• The financial system is ambivalent because it supports investment, growth, innovation, risk diversification and liquidity while also potentially fostering excessive debt, bubbles, banking crises, market panics and systemic externalities.

Further detail

• Bagehot emphasizes the lender-of-last-resort function, while Fisher, Keynes, Minsky, Kindleberger, Bernanke, Gorton and Shiller show how finance can become a source of macroeconomic instability. — Lombard Street, 1873

📖 9. Financial Development and Market Efficiency

🔑 Key Concepts & Definitions

• Financial market efficiency : Eugene Fama, Efficient Capital Markets, 1970 — the hypothesis that asset prices incorporate all available information

★ Must-know

• The three forms of efficiency are:

  • weak form
  • semi-strong form
  • strong form

• Arcand, Berkes and Panizza argue in Too Much Finance? (2015) that beyond a certain threshold, financial development can negatively affect growth. — Arcand, Berkes et Panizza, Too Much Finance ?

Further detail

• King and Levine show in Finance and Growth: Schumpeter Might Be Right (1993) that financial-development indicators predict future growth, capital accumulation and productivity gains. — King et Levine

💡 Memory Hook

Finance supports growth through information and allocation, but excessive finance can create instability.

📖 10. Market Expectations and Financial Fragility

📝 Essential Points

• Self-referential expectations can move asset prices away from fundamental values because investors anticipate what other investors will think rather than only evaluating fundamentals. — Keynes, The General Theory of Employment, Interest and Money, 1936

• Shiller shows that stock prices fluctuate much more than can be justified by subsequent observed dividends. — Do Stock Prices Move Too Much to be Justified by Subsequent Changes in Dividends ?, 1981

📌 Grossman and Stiglitz argue that perfectly informative markets are impossible because information collection is costly and investors need profit opportunities to produce information. — Grossman et Stiglitz, On the Impossibility of Informationally Efficient Markets, 1980

• When interest rates rise in an imperfect-information credit market, prudent borrowers may withdraw while risky borrowers remain, increasing adverse selection and moral hazard and leading banks to ration credit. — Stiglitz et Weiss, Credit Rationing in Markets with Imperfect Information, 1981

💡 Memory Hook

Optimism → leverage → asset-price increases → fragility → crisis.

📖 11. Systemic and Exchange-Rate Crises

📝 Essential Points

• 🔄 The debt-deflation sequence is (Fisher, 1933):

  1. simultaneous deleveraging
  2. asset sales
  3. falling prices
  4. rising real debt burdens
  5. weaker balance sheets
  6. further asset sales

• Minsky distinguishes:

  • hedge finance
  • speculative finance
  • Ponzi finance

• A Minsky moment occurs when an expansion based on debt and risk-taking abruptly reverses as agents lose confidence, sell assets, reduce collateral and face tighter credit. — Stabilizing an Unstable Economy, 1986

• The failure of Lehman Brothers in September 2008 transformed a US housing and financial crisis into a global systemic crisis.

💡 Memory Hook

First-generation fundamentals, second-generation expectations, third-generation balance sheets.

📖 12. Financial Regulation and Safety Nets

★ Must-know

📌 Microprudential regulation protects the soundness of individual institutions, whereas macroprudential regulation limits systemic risk, contagion and financial procyclicality. — Crockett, Marrying the Micro- and Macro-prudential Dimensions of Financial Stability, 2000

📌 Under Bagehot’s lender-of-last-resort doctrine, the central bank should lend rapidly and abundantly during a crisis, at a penalty rate and against good collateral, to illiquid but solvent institutions. — Lombard Street, 1873

• European deposit-guarantee rules harmonize protection at 100,000 euros per depositor and per bank, with a target reimbursement period of seven working days.

Further detail

• Basel III introduces or strengthens:
  • capital requirements
  • LCR liquidity ratio
  • NSFR liquidity ratio
  • leverage ratio

💡 Memory Hook

Microprudential regulation protects individual institutions; macroprudential regulation protects the system.

📖 13. Non-Bank Finance and Inclusion

🔑 Key Concepts & Definitions

• Private equity : investment in the equity of unlisted companies, often over the medium or long term, to create value through growth, restructuring, operational improvement, acquisition or resale
• Crowdfunding : the financing of a project by contributions from a large number of savers through a digital platform
• Microfinance : Microfinance includes microcredit as well as savings, insurance, transfers, payment services and sometimes entrepreneurial support for financially excluded populations.

📝 Essential Points

• The 2025 French solidarity-finance barometer reports 29.4 billion euros of solidarity savings outstanding at the end of 2024 and 739 million euros of solidarity financing generated in 2024.

📖 14. Green and Digital Finance

🔑 Key Concepts & Definitions

• Green finance : financial instruments intended to fund environmentally beneficial projects such as renewable energy, energy efficiency, clean transport, climate adaptation and biodiversity

★ Must-know

• Green bonds allow a state, company, bank, local authority or supranational institution to raise funds earmarked for environmental projects.

• The failure of Silicon Valley Bank in 2023 illustrated that digital bank runs can become massive and nearly instantaneous through banking applications and social networks.

Further detail

• Climate risks are deep, uncertain, nonlinear and potentially irreversible, according to Bolton et al. in The Green Swan (2020).

📖 15. Finance, Innovation and Risk

🔑 Key Concepts & Definitions

• Tokenization : the representation of financial or monetary assets on distributed ledgers or programmable platforms

📝 Essential Points

📌 Cryptoassets are volatile and mainly speculative, whereas stablecoins seek to maintain a stable value, often by reference to the dollar.

• The five main functions are:
  • mobilizing savings
  • allocating capital
  • producing information
  • managing risks
  • providing liquidity

📌 Recent financial innovations diversify financing channels but relocate risks into private equity, private credit, crowdfunding, microcredit, green finance and cryptoassets rather than eliminating them.

💡 Memory Hook

New financing channels broaden access but relocate rather than eliminate financial risks.

📖 16. Information Asymmetries and Credit Rationing

🔑 Key Concepts & Definitions

• Adverse selection : Akerlof, G. A. — the market problem caused by hidden information about the quality of goods or borrowers, as analyzed by George A. Akerlof in “The Market for Lemons: Quality Uncertainty and the Market Mechanism” (1970)
• Credit rationing : Stiglitz, J. E. et Weiss, A., Credit Rationing in Markets with Imperfect Information — Credit rationing occurs when lenders limit the quantity of credit supplied to some borrowers rather than raising interest rates, because imperfect information can make higher rates increase borrower risk, as modeled by Joseph E. Stiglitz and Andrew Weiss (1981).
• Delegated monitoring : Diamond, D. W., Financial Intermediation and Delegated Monitoring — the bank’s role as a delegated monitor that reduces the costs of supervising borrowers, according to Douglas W. Diamond (1984)

📝 Essential Points

• In Diamond and Dybvig’s model, a bank run can become self-fulfilling when depositors withdraw because they expect other depositors to withdraw, which justifies deposit insurance (1983). — Diamond, D. W. et Dybvig, P. H., Bank Runs, Deposit Insurance, and Liquidity

💡 Memory Hook

Information asymmetry → adverse selection, credit rationing, and banking fragility

📖 17. Finance and Economic Growth

★ Must-know

📌 McKinnon and Shaw distinguish financial repression, which restricts financial markets, from financial liberalization and deepening, which mobilize savings and support development in their 1973 works.

• King and Levine’s 1993 empirical study links financial development to long-term economic growth and presents evidence consistent with Schumpeter’s view that finance supports innovation and development. — King, R. G. et Levine, R., Finance and Growth: Schumpeter Might Be Right

• Arcand, Berkes, and Panizza (2015) argue that the relationship between finance and growth is nonlinear and that beyond a certain threshold finance can become unfavorable to growth. — Arcand, J.-L., Berkes, E. et Panizza, U., Too Much Finance?

Further detail

• Philippon (2015) analyzes the unit cost of financial intermediation in the United States and asks whether the finance industry has become less efficient. — Philippon, T., Has the US Finance Industry Become Less Efficient? On the Theory and Measurement of Financial Intermediation

💡 Memory Hook

Financial deepening supports growth, but excessive finance can hinder it

📖 18. Financial Bubbles and Instability

🔑 Key Concepts & Definitions

• Debt deflation : Fisher, I., The Debt-Deflation Theory of Great Depressions — a mechanism in which falling prices increase the real burden of debt and can deepen economic contractions, as described by Irving Fisher (1933)
• Financial instability : Minsky, H. P., Stabilizing an Unstable Economy — a theory of endogenous financial instability that explains financial crises as generated internally by changing financing structures and increasingly fragile indebtedness (1986)
• Financial accelerator : Bernanke, B. S., Gertler, M. et Gilchrist, S., The Financial Accelerator in a Quantitative Business Cycle Framework — the formalized mechanism through which financial conditions amplify fluctuations in the real economy, developed by Bernanke, Gertler, and Gilchrist (1999)
• Second-generation crisis : Obstfeld, M., Models of Currency Crises with Self-Fulfilling Features — a self-fulfilling crisis in which authorities face a policy trade-off and may abandon a fixed exchange-rate regime, as in Obstfeld’s model (1996)
• Procyclicality : Borio, C., Towards a Macroprudential Framework for Financial Supervision and Regulation? — the tendency of financial conditions to amplify economic cycles, making macroprudential regulation necessary, as emphasized by Borio (2003)
• Microcredit : Yunus, M., Banker to the Poor: Micro-Lending and the Battle Against World Poverty — the provision of small loans associated with the Grameen Bank and analyzed by Muhammad Yunus in Banker to the Poor (1999)
• Shadow banking : Pozsar, Z., Adrian, T., Ashcraft, A. et Boesky, H., Shadow Banking — a parallel banking system involving securitization, repurchase agreements, money-market funds, and collateral, analyzed by Pozsar, Adrian, Ashcraft, and Boesky (2010)
• Third-generation crisis : Chang, R. et Velasco, A., A Model of Financial Crises in Emerging Markets — a crisis that links international liquidity crises to banking fragility, as modeled by Chang and Velasco (2001)

★ Must-know

• Krugman’s 1979 model explains first-generation currency crises as speculative attacks on fixed exchange-rate regimes when macroeconomic policies are inconsistent with the regime. — Krugman, P., A Model of Balance-of-Payments Crises

• The Asian currency and financial crisis was analyzed through financial fragilities, implicit guarantees, external indebtedness, information asymmetries, and banking fragility by Corsetti, Pesenti, Roubini, and Mishkin (1999). — Corsetti, G., Pesenti, P. et Roubini, N., What Caused the Asian Currency and Financial Crisis?

📌 Microprudential regulation focuses on the soundness of individual financial institutions, whereas macroprudential regulation focuses on systemic financial stability, as distinguished by Crockett (2000). — Crockett, A., Marrying the Micro- and Macro-prudential Dimensions of Financial Stability

📌 Basel III provides a global regulatory framework intended to make banks and banking systems more resilient, according to the Basel Committee on Banking Supervision (2010). — Basel III: A Global Regulatory Framework for More Resilient Banks and Banking Systems

• The Green Swan analyzes climate risks as systemic risks for central banking and financial stability, according to Bolton, Despres, Pereira da Silva, Samama, and Svartzman (2020). — Bolton, P., Despres, M., Pereira da Silva, L. A., Samama, F. et Svartzman, R., The Green Swan: Central Banking and Financial Stability in the Age of Climate Change

Further detail

📌 The 2014/49/EU Directive harmonizes deposit-guarantee systems in the European Union up to 100,000 euros per depositor and per bank. — Directive 2014/49/UE du Parlement européen et du Conseil, relative aux systèmes de garantie des dépôts

• The 2025 Sustainable Debt: Global State of the Market report provides data on green bonds and GSS+ issuance through the Climate Bonds Initiative.

• The 2025 Barometer of crowdfunding in France provides data on participatory finance in France, while the Global Private Markets Review (2024) covers private equity, private credit, and private markets.

💡 Memory Hook

Debt deflation → banking crisis → financial accelerator → macroeconomic downturn

📊 Synthesis Tables

Main forms of financing

Form	Mechanism	Examples
Internal financing	Use of the agent’s own resources	Retained profits, depreciation, reserves
Indirect external financing	Intermediation by financial institutions	Bank credit
Direct external financing	Issuance of securities to lenders	Shares, bonds, commercial paper, hybrid securities

Forms of market efficiency

Form	Information incorporated	Implication
Weak	Past prices	Past price information is incorporated
Semi-strong	All public information	Public information cannot systematically generate excess returns
Strong	Public and private information	Even privileged information cannot systematically generate excess returns