International Economics - Lecture Notes

Course Overview and Exam Information

• This course serves as the concluding introductory exploration into international economics, synthesizing foundational concepts and contemporary issues.

• The final TP (Travaux Pratiques) session this week delves into the historical context and underlying mechanisms of key historical events and phenomena discussed throughout the semester. The TP aims to consolidate understanding and analytical skills.

• Reviewing past exams from 2022, 2023, and 2024 reveals a focus on macroeconomic questions that may not entirely align with the current course content. These deviations stem from variations in the specific topics covered each year, necessitating a nuanced approach to studying.

• Familiarize yourself with terms such as "parité de pouvoir d'achat" (purchasing power parity) and "parité des taux d'intérêt" (interest rate parity." While these concepts may appear, the methodologies and contextual applications may differ from those taught in the current course.

• The TP this week features novel questions pertaining to historical events and mechanisms, notably speculative attacks. These topics received less emphasis in prior years, underscoring their significance in the current curriculum.

• Questions concerning trade from the 2024 exam bear resemblance to those found in quizzes, offering valuable practice. However, macroeconomic questions may prove challenging due to course content variations.

• The course culminates with an in-depth analysis of the three major crises discussed in the final chapter, with the exclusion of Chapter 5. This focused approach allows for a comprehensive understanding of these critical events.

Interest Rate Parity

• The instructor addresses prevalent concerns regarding the comprehension of interest rate parity, a concept that posed difficulties for some students in the previous TP session. Clarification is provided to ensure a thorough understanding.

• Recognizing that some assistants elucidated interest rate parity through mathematical equations, the instructor acknowledges the potential benefit of this approach for certain students. However, it's emphasized that a strictly mathematical understanding isn't mandatory for success in the course. The core focus remains on grasping the underlying mechanism and its assessment in exam questions.

• To illustrate the concept, the instructor employs a practical example involving a trader in a large bank. This scenario contextualizes interest rate parity within the realm of international finance.

• As a trader managing a portfolio, the primary objective is to secure the highest possible returns globally, with a particular emphasis on countries characterized by free capital flow. This pursuit necessitates a comparative analysis of interest rates in domestic versus foreign markets.

• Investing domestically entails allocating capital within the home country and receiving it back with domestic interest after a specified period, typically one year. This serves as the baseline for evaluating alternative investment opportunities.

• Conversely, the allure of higher foreign interest rates may prompt consideration of investing abroad. However, this necessitates converting domestic currency into the foreign currency to facilitate the investment.

• Upon the conclusion of the investment period, typically one year, the capital is repatriated in the foreign currency, accompanied by the accrued foreign interest. This necessitates converting the foreign currency back into the domestic currency at the prevailing exchange rate.

• In scenarios where the exchange rate remains fixed, owing to agreements or other factors, the decision-making process simplifies to a direct comparison of domestic and foreign interest rates. This straightforward assessment guides investment choices.

• However, the complexities arise when the exchange rate fluctuates, introducing the potential for gains or losses attributed to currency appreciation or depreciation. These fluctuations must be factored into the investment calculus.

• In instances where the domestic currency depreciates, a gain in capital is realized upon conversion, potentially offsetting or surpassing the gains derived from the higher foreign interest rate. This dynamic alters the attractiveness of foreign investment.

• Conversely, appreciation of the domestic currency may lead to a loss of capital, thereby diminishing or negating the benefits of the higher foreign interest rate. This underscores the importance of considering exchange rate risk in investment decisions.

• Consequently, when contemplating investments abroad, a comprehensive assessment must encompass both the foreign interest rate and anticipated exchange rate fluctuations. This dual consideration ensures a well-informed investment strategy.

• The decision-making process is further complicated by the presence of numerous traders managing substantial funds, each conducting similar calculations. Their collective actions exert influence on exchange rates, thereby introducing additional layers of complexity.

• Anticipation of a higher foreign interest rate coupled with minimal exchange rate fluctuations may incentivize many traders to invest abroad, leading to the sale of the domestic currency and its subsequent depreciation. This phenomenon highlights the interconnectedness of financial markets.

• Conversely, upon the maturation of investments and the repatriation of funds, traders sell the foreign currency to purchase the domestic currency, resulting in its appreciation. This appreciation partially mitigates the gains earned from the higher foreign interest rate, illustrating the self-correcting nature of the market.

• Exploitable disparities between interest rates, adjusted for exchange rate variations, trigger financial flows. These flows represent the market's attempt to equalize returns across different investment opportunities.

• Financial flows achieve stability when investors perceive equivalent appeal in investing domestically at the domestic interest rate or investing abroad, factoring in anticipated exchange rate fluctuations. This equilibrium reflects a state of market efficiency.

• This equilibrium embodies the condition of interest rate parity, wherein the return on domestic investment equals the return on foreign assets, encompassing foreign interest rates and anticipated exchange rate depreciation. This parity ensures that no arbitrage opportunities exist.

• For instance, if a foreign interest rate stands at 2% and a currency depreciation of 3% is expected, the domestic interest rate must be at least 5% to deter capital outflow. This differential compensates investors for the perceived risk of currency depreciation.

• Conversely, anticipation of strong currency appreciation may offset higher foreign interest rates, rendering domestic investment more attractive. This underscores the influence of exchange rate expectations on investment decisions.

• The pivotal concept is that the international financial market attains equilibrium when the domestic interest rate equals the return on foreign assets, incorporating both the foreign interest rate and exchange rate variations. This equilibrium reflects the efficient allocation of capital across borders.

• Discrepancies in interest rates are frequently offset by variations in exchange rates, with larger anticipated depreciation correlating with wider gaps between interest rates. This reflects the market's compensation for perceived currency risk.

• The instructor underscores the paramount importance of comprehending the rationale behind interest rate parity, as opposed to fixating on intricate calculations. This conceptual understanding provides a solid foundation for navigating complex financial scenarios.

• The concept serves as a cornerstone for understanding the triangle of incompatibility and the dynamics of speculative attacks when devaluation is anticipated. This knowledge is indispensable for informed decision-making in international finance.

Global Financial Crisis of 2008-2009

• The global financial crisis of 2008-2009 stands as a watershed event, rivaling the magnitude of the crisis of 1929. Its repercussions reverberated across the global economy, leaving a lasting impact on financial institutions and markets.

• The proliferation of financial deregulations since the 1980s played a pivotal role in exacerbating the crisis. These deregulations, intended to foster innovation and efficiency, inadvertently paved the way for excessive risk-taking and systemic vulnerabilities.

• Regulations enacted post-1929, notably the Glass-Steagall Act, aimed to mitigate excessive risk-taking by banks. These safeguards sought to prevent the recurrence of the conditions that precipitated the Great Depression.

• A key provision of the Glass-Steagall Act was the separation of depositbanks and investment banks. This segregation aimed to prevent the conflation of commercial banking activities with riskier investment endeavors.

• The tide of deregulation in the 1980s culminated in the repeal of the Glass-Steagall Act in 1999, thereby dismantling the regulatory barriers that had separated deposit banks and investment banks. This repeal allowed banks to engage in a broader spectrum of investment activities, including those carrying higher risks.

• Banks adeptly managed two principal types of mismatches: - Maturity mismatch: This involved borrowing funds on a short-term basis and investing in assets with long-term maturities. This strategy, while potentially lucrative, exposed banks to liquidity risks. - Currency mismatch: This entailed investing in currencies different from those in which funds were borrowed. This practice introduced currency risk, as fluctuations in exchange rates could erode returns.

• During periods of economic expansion, these mismatches remained largely manageable, as favorable market conditions mitigated potential risks. However, any unforeseen disruption had the potential to trigger significant problems.

• Banks were entrusted with the responsibility of self-evaluating the risks associated with their investments. However, this self-assessment was not always reliable, as inherent biases and conflicts of interest could undermine objectivity.

• The prevailing belief that governments would intervene to bail out large banks deemed "too big to fail" fostered a culture of excessive risk-taking. This moral hazard incentivized reckless behavior, as banks anticipated government support in times of distress.

• The structure of the financial system allowed for the privatization of profits while socializing risks. This meant that while banks reaped the benefits of successful ventures, the costs of failures were borne by governments and taxpayers.

• The increasing sophistication of financial products rendered it exceedingly difficult to comprehend the risks involved. Complex instruments such as derivatives and securitized assets obscured the true nature of underlying exposures, making risk assessment challenging.

• While the US pursued deregulation, Europe mirrored this approach with the Single European Act, which aimed to promote financial market deregulation across the continent. This convergence towards deregulation amplified systemic risks on a global scale.

• The genesis of the crisis can be traced back to the US subprime mortgage market, where lending practices catered to individuals with questionable creditworthiness.

Subprime Mortgage Crisis

• The crisis stemmed from the US subprime mortgage market, which involved extending credit to individuals typically deemed ineligible for conventional loans. This practice aimed to broaden homeownership opportunities but carried inherent risks.

• The overarching goal was to promote homeownership, and lending was secured by the properties themselves. This collateralization provided a degree of security but did not fully mitigate the risks associated with subprime lending.

• These subprime mortgages were inherently high-risk loans, characterized by elevated default probabilities. Borrowers often lacked the financial stability to meet their repayment obligations, increasing the likelihood of foreclosure.

• Mortgage-backed securities were created through the securitization of numerous individual mortgages. This process involved pooling together a diverse array of mortgages into a single investment product.

• These packages were purported to be safer due to the diversification of risk across a multitude of borrowers from various regions of the US. However, this diversification did not eliminate the underlying risks associated with subprime mortgages.

• These subprime mortgages were widely recognized as exceedingly risky and were often prohibited in other nations due to their inherent dangers.

• Some European countries explicitly forbade their banks from investing in subprime loans on the American market, citing concerns about excessive risk exposure.

• However, banks extensively invested in subprime mortgages, often employing shadow banking systems to circumvent regulatory oversight. This regulatory arbitrage amplified the risks associated with subprime lending.

• As interest rates rose in the US, many borrowers found themselves unable to meet their mortgage obligations, leading to widespread defaults. This surge in defaults triggered a cascade of negative consequences throughout the financial system.

• Banks initiated foreclosure proceedings and began repossessing and selling properties, contributing to a sharp decline in the real estate market. This downward spiral exacerbated the crisis.

• The value of homes plummeted, often falling below the outstanding loan amounts, thereby incentivizing more defaults. This phenomenon created a self-reinforcing cycle of declining home values and rising defaults.

• The intricate nature of the securities rendered it challenging to accurately assess the specific risks and exposures. This opacity hampered effective risk management and contributed to the spread of the crisis.

• This problem propagated through interconnected financial firms on a global scale, as institutions worldwide held exposures to subprime mortgage-backed securities. This interconnectedness amplified the systemic risks associated with the crisis.

• The loss of confidence between banks, which became reluctant to lend to one another, precipitated a liquidity crisis. This breakdown in interbank lending froze credit markets and exacerbated the financial turmoil.

• Central banks globally injected liquidity into the interbank market to avert a complete collapse of the financial system, drawing upon lessons learned from the crisis of 1929. This intervention aimed to restore confidence and facilitate lending.

• Central banks repurchased toxic assets and implemented measures of quantitative easing to inject liquidity into the economy and stabilize financial markets. These unconventional policies were aimed at mitigating the adverse effects of the crisis.

Government Intervention and the Eurozone Crisis

• Governments deployed budget policy to cushion the impact of recessions, but the bank bailouts fueled a debt crisis in the Eurozone. This intervention, while necessary to stabilize the financial system, added to the burden of public debt.

• A crisis was triggered by Greece's announcement of an exceptionally high deficit in 2009, which shook investor confidence in the country's ability to manage its debt. This revelation sparked concerns about the broader stability of the Eurozone.

• A vicious cycle emerged between governments and banks, wherein each became increasingly reliant on the other. This interdependence amplified systemic risks and exacerbated the crisis.

• Governments issued bonds to finance deficit reduction efforts, but these bonds were often purchased by banks. This created a feedback loop, as banks became heavily exposed to government debt.

• The bailout of banks resulted in soaring deficits, which prompted the financial world to question the sustainability of public debt. Uncertainty surrounding the bonds undermined confidence in the very instruments used to rescue the banks, transforming bank debt into sovereign debt.

• The Eurozone crisis intensified due to several compounding factors: - The inability of countries to independently create currency to settle debts constrained their policy options. This limitation hampered their ability to address the crisis effectively. - The constraints on the European Central Bank's ability to directly purchase government bonds further restricted policy flexibility. This restriction prevented the ECB from acting as a lender of last resort. - Disparities in competitiveness among countries with varying inflation rates exacerbated economic imbalances. A uniform currency area magnified these disparities, hindering trade and economic convergence. - Inconsistent political discourse and messaging undermined confidence in the Eurozone's ability to resolve the crisis. This communication breakdown amplified market anxieties.

• These circumstances fostered an environment where undertaking ill-advised debt seemed plausible, as countries grappled with the challenges of navigating the crisis. This misjudgment prolonged the crisis and exacerbated its consequences.

• The ECB intervened by purchasing secondary Greek debt, thereby stabilizing the situation and mitigating the risk of a Greek default. This intervention underscored the ECB's commitment to preserving the integrity of the Eurozone.

• A stronger European identity began to materialize as countries recognized the imperative of collective action to address the crisis. This sense of solidarity fostered greater cooperation and coordination among member states.

• Political and messaging missteps by governments, such as those by Angela Merkel, exacerbated market turbulence and hindered efforts to restore calm. This communication breakdown underscored the importance of clear and consistent messaging during times of crisis.

Swiss Currency Refuse

• The Swiss franc served as a refuge throughout this period, as investors repatriated their funds in response to market instability. This flight to safety bolstered the value of the Swiss franc.

• The Swiss National Bank intervened to stabilize the currency in 2009 and was compelled to provide stability in the face of widespread uncertainty. This intervention underscored the central bank's commitment to maintaining financial stability.

COVID-19 Pandemic

• During the pandemic, the ECB lowered interest rates and reinstated unconventional measures to stimulate the economy and mitigate the adverse effects of the crisis. These policy actions aimed to cushion the economic blow of the pandemic.

• The pandemic fostered solidarity among European countries, leading to a more unified budget and heightened cooperation through shared objectives. This collective response underscored the resilience and adaptability of the European Union.

Course Review and Gratitude

• The instructor expresses appreciation to the students for their active participation and constructive feedback on the course content, encompassing discussions on current events and pacing. This feedback is invaluable for refining the course curriculum.

• Suggestions for enhancements included the incorporation of more frequent in-class quizzes, which the instructor will duly consider for future iterations of the course. A careful balance must be struck between allocating time for quizzes and providing comprehensive explanations.

• The instructor extends well wishes to the students, expressing hope for their future success and perseverance in their academic pursuits. This sentiment underscores the instructor's commitment to student mentorship.