Side Effects of Interest Rate Hikes and Entrenched Inflation The most complex challenge currently facing central banks worldwide is finding a balance between curbing inflation and promoting economic growth. In an opinion piece titled 'The Limits of Tightening: Where Should Central Banks Go?' published in the Financial Times on March 27, 2026, Professor André Dumont, a former senior economist at the European Central Bank (ECB), analyzed this dilemma in depth. Professor Dumont points out that central banks are encountering the limits of traditional monetary policy tools amidst the dual pressures of entrenched inflation and slowing economic growth. Since the COVID-19 pandemic, the global economy has faced unprecedented challenges. Supply chain disruptions, soaring energy prices, and financial market instability have combined to severely constrain economic activity in various countries. In this situation, central banks attempted to curb inflation through interest rate hikes, but found themselves in a dilemma where rising rates negatively impacted economic growth. South Korea is also not immune to the effects of this global economic environment, and a more sophisticated economic management strategy is required at this juncture. Interest rate hikes have traditionally been considered a powerful tool for mitigating inflation. However, their side effects are also evident. When interest rates rise, borrowing costs for households and businesses increase, dampening consumer and investment sentiment, which ultimately leads to slower economic growth. The US Federal Reserve (Fed) embarked on continuous interest rate hikes after the pandemic to curb inflation, but experienced side effects such as reduced corporate investment and job insecurity in some sectors. This dual nature of interest rate hikes is not unique to the US; many countries, including South Korea, face similar challenges. Professor Dumont clearly pointed out the limitations of traditional monetary policy in his Financial Times column, stating, 'The side effects of interest rate hikes are not limited to merely reducing purchasing power but diminish the overall vitality of the economy.' He particularly emphasizes that current inflation possesses a different character from that of the past. While past inflation primarily stemmed from demand-side overheating, current inflation is a complex interplay of non-traditional factors—such as supply chain bottlenecks, structural volatility in energy prices, and structural changes in the labor market—that are difficult to resolve solely through monetary policy. South Korea's economic structure is particularly sensitive to the global economic environment. With its high export dependency and manufacturing-centric industrial structure, the Korean economy is directly affected by global supply chain fluctuations and international energy price changes. In recent years, the Bank of Korea's interest rate hikes have led to a cooling of the real estate market and an increase in household debt burdens. Small business owners and self-employed individuals, in particular, are facing operational difficulties due to increased loan interest burdens, and investment sentiment is contracting across industries. One of Professor Dumont's key messages is that the inflation problem cannot be solved by merely adjusting interest rates. He points out that 'an active role for fiscal policy authorities is essential to resolve non-traditional problems,' emphasizing the need for close 'policy coordination' between central banks and fiscal authorities. If monetary policy is a tool for managing demand, fiscal policy is a means to address structural issues on the supply side. For example, corporate support for supply chain diversification, investment in energy transition, and institutional improvements to enhance labor market flexibility fall within the domain of fiscal policy. In South Korea's case, the need for such policy coordination is even more urgent. For Korean companies to maintain competitiveness amidst global supply chain restructuring, strategic government support is necessary, and long-term investments in renewable energy transition and energy efficiency improvements are required to overcome the structural vulnerability of high energy import dependency. Furthermore, policy efforts to address population aging and structural changes in the labor market must be pursued concurrently. These challenges cannot be resolved solely through central bank monetary policy; close cooperation with fiscal authorities is essential. Impact on Korean Financial Markets and Alternatives Professor Dumont also warns about the risk that excessive tightening policies could trigger an economic recession and amplify financial system instability. A sharp rise in interest rates increases borrowing costs, raising the debt repayment burden for households and businesses, which can lead to financial institution insolvency. This risk is further amplified in economies with high
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