KDI - Korea Development Institute - RESEARCH - Research Areas

Summary

Research Monograph KOR The Impact of Increased Government Bond Issuance and Policy Directions

This study analyzes the repercussions of the sharp increase in government bond issuance following the economic crisis induced by COVID-19. The surge in the issuance of government bonds in South Korea was substantial, driven by the need for financial resources to support expansive fiscal policies in response to the pandemic. As government bond issuance rises, so does the yield on government bonds. Given that the demand in the financial market comprises households, businesses, the government, and external sectors, the increased issuance not only affects government bond yields but also leads to a rise in interest rates faced by households and businesses.

Conversely, the study explores the impact of government bond buy-backs on yield changes, offering a direction opposite to that of increased issuance. Utilizing a dynamic Nelson-Siegel model with macro factors, including macroeconomic variables, the study estimates changes in the yield curve resulting from both increased issuance and buy-backs. Empirical analysis reveals that a 1 trillion KRW increase in government bond issuance leads to a 2.5 to 2.9 basis points rise in yields, particularly pronounced in the medium to long-term maturities. Conversely, a 1 trillion KRW increase in government bond buy-backs results in a 1.9 to 2.1 basis points decrease in yields, with a more significant impact on medium to long-term maturities with relatively less demand.

Moving on to domestic demand factors, the study examines the influence of macroprudential regulations on government bond yields. Specifically, it analyzes the impact of restrictions on securities firms' participation in the call market and banking sector liquidity regulations, such as the Liquidity Coverage Ratio (LCR). These regulations, introduced to maintain stability in financial systems post-global financial crisis, have direct and indirect effects on government bond demand, consequently influencing market interest rates and resource allocation.

The analysis indicates that restricting securities firms' call market participation to below 25% of equity leads to a substantial increase in securities firms' participation in the repo market. Consequently, the demand for government bonds by securities firms increases, resulting in a yield decrease of approximately 10.8 to 12.5 basis points. Similarly, the phased introduction of LCR regulations leads to increased demand for government bonds by banks, contributing to a yield decrease of around 6.1 to 7.3 basis points. These findings underscore the importance of considering the ripple effects on financial markets through government bond demand when adjusting the intensity of financial stability regulations.

Lastly, the study examines the impact of external uncertainties, represented by global volatility (VIX), on foreign capital flows and exchange rates. Traditionally, an increase in VIX corresponds to capital outflows and currency depreciation. However, recent observations indicate a decrease in the magnitude of these effects, suggesting a shift in the behavior of foreign investors in government bonds. The study concludes by highlighting the need to consider the potential effects on financial markets through government bond demand when adjusting or introducing financial stability regulations in the future.

Summary

KDI FOCUS Enhancing the Prudential Framework for Securities Firms

Despite increasing risk exposure from expanding assets and leverage among large securities firms, the current Net Capital Ratio (NCR) framework does not adequately capture these risks. To strengthen risk sensitivity while maintaining a balance between financial soundness and industry growth, the NCR formula for large securities firms should revert to its pre-2016 structure, and a differentiated regulatory approach tailored to business scope and risk characteristics should apply to small- and medium-sized firms.

- As securities firms continue to grow rapidly in both asset size and functional scope, concerns have been raised that the current NCR framework may not adequately reflect the risks associated with this expansion, potentially creating regulatory gaps with implications for financial stability.

- The IMA system, scheduled for end-2025, is expected to expand short-term funding capacity at large securities firms, potentially reinforcing further growth in asset size and market influence.

- The March 2020 margin call episode provides a clear illustration of how prudential vulnerabilities at securities firms can propagate across the broader financial system.

- Led by large securities firms, assets and leverage have expanded rapidly, accompanied by increased derivatives investment and growing reliance on shortterm funding instruments, including RP and shortterm notes.

- In 2016, Korea revised the NCR formula, shifting the prudential orientation for securities firms from agoing-concern to a goneconcern basis.

- Under the current NCR framework, rising leverage is not adequately reflected in the indicator, weakening its role as a warning signal.

- The systemic importance of large securities firms has steadily increased alongside their expanding assets and leverage.

- To accurately reflect the risks associated with asset and leverage expansion at large securities firms, the NCR formula should return to “net operating capital ÷ total risk.”

- Regulatory intensity should vary with firm size and business characteristics to balance financial stability with market dynamism.

- As the scale and functional scope of securities firms expand, NCR reform should be the starting point for broader regulatory reforms to preempt the excessive accumulation of systemic risk.

Summary

Policy Study KOR Time Preference Estimation in Korea: Focusing on the Impact of Age

This study systematically analyzes the relationship between time preference and age in South Korea, offering policy implications. It reviews the theoretical foundations of age-specific characteristics of time preference and empirically examines time preferences using survey methodology. Findings reveal that time preferences follow a U-shaped pattern with age, reaching their lowest point in the 45-50 age range. Educational attainment significantly impacts time preferences, with college graduates linked to lower preferences and smoother age-related patterns compared to those with high school education or less. Additionally, life insurance policyholders and groups with high financial literacy demonstrate lower and more stable time preferences. These results suggest the need for targeted life-cycle policies. Contrary to traditional economic theory’s view of time preference as a fixed exogenous variable, this study suggests potential endogenous changes, advocating tailored policy approaches in savings, education, finance, and information provision.

Summary

KDI FOCUS The Role of Capital Structure in Real Estate Project Financing: Risk, Cost, and Policy Implications

By examining project-level data on real estate project financing (PF), I find that higher equity ratios are associated with lower overall risk and reduced project costs. This finding supports policy measures aimed at strengthening capital structures without unduly constraining PF activity. If regulatory lending limits are to be introduced, they should target only low-equity PF projects. Moreover, preferred shares should be recognized as regulatory-eligible equity capital, and the deferral of capital gains tax should be made permanent to encourage in-kind land contributions. It is equally important to address regulatory arbitrage involving Project Finance Vehicles (PFVs), which are often exploited to pursue large-scale developments with minimal capital.

- The government has announced measures to expand PF equity capital, but without disclosing project-level data, there is no empirical basis to assess whether this expansion sufficiently reduces risk.

- Empirical analysis finds that expanding PF equity capital lowers risks across presale, default, postdefault recovery failure, and post-completion refinancing failure.

- PF capital expansion reduces construction, f inancing, and other costs, which in turn lowers total project costs.

- Increases in PF equity ratios diminish contractors’ guarantee risk, reduce construction costs, and thereby lessen completion risk.

- The current plan properly combines capital requirements with incentives, but specificity and effectiveness should be improved.

- PF lending caps should apply only to loans on low-equity projects, not to all PF loans.

- Policy incentives should extend to preferred shares as eligible PF equity capital to attract more equity investors.

- The capital gains tax deferral for in-kind land contributions should be permanent.

- PFVs have enabled undercapitalization in large projects, and prudential regulation and supervision on par with project REITs should be introduced in stages for PFVs to close regulatory arbitrage and strengthen the capital base.

Summary

Policy Study KOR Strengthening Macroprudential Management for Non-Bank Financial Institutions in Korea: Focusing on the Issuance of Equity-Linked Securities (ELS)

This study proposes measures to strengthen macroprudential management for non-bank financial institutions (NBFIs), such as securities firms and insurers, whose importance has grown since the 2008~2009 Global Financial Crisis. Major economies and international financial institutions have actively discussed and pursued new or enhanced supervisory and regulatory frameworks for managing NBFI-related systemic risk.

Using ΔCoVaR, a leading systemic risk metric capturing changes in conditional value at risk, this study analyzes the evolution of systemic risk among South Korea’s banks, securities firms, insurers, and individual financial institutions during major financial shocks, including the Global Financial Crisis, the European Debt Crisis, and the COVID-19 pandemic. Findings reveal substantial increases in systemic risk across all sectors during each crisis, with banking generally exhibiting the highest levels. Sectoral differences varied, with risk for securities firms surging during the March 2020 margin call event, markedly narrowing the gap with banks compared to previous crises.

The study further empirically examines the impact of Equity-Linked Securities (ELS) issuance by financial institutions on systemic risk (ΔCoVaR). Results indicate that increased ELS issuance contributed significantly to heightened systemic risk during the Global Financial Crisis, the European Debt Crisis, and the COVID-19 crisis. These findings underscore the growing importance of NBFIs in macroprudential management and call for systematic monitoring with enhanced regulatory oversight of the non-bank financial sector.

Summary

Policy Study KOR Investor Composition of Government Debt and its Fiscal Implications

This paper estimates the demand for South Korea’s government bonds across investor categories and projects future bond yields in light of the country’s rising debt trajectory. A cross-country analysis shows that public and non-bank sectors have been key drivers of increased foreign investor holdings of Korean government debt during the COVID-19 pandemic. Using sectoral debt holdings data, the paper examines the evolution of marginal holdings of government bonds by each sector and estimates the responsiveness of debt demand to bond yield changes. Over the past decade, domestic banks and public institutions, including the National Pension Service, have reduced their marginal holdings, while private pension and investment fund sectors have increased theirs. These findings highlight the growing importance of non-bank sectors in government debt demand, consistent with the literature (Fang et al., 2022). Foreign investors exhibit the highest demand sensitivity to bond yields, whereas domestic insurance companies show the lowest. Based on sectoral demand estimates, a 10% increase in government debt is estimated to raise bond yields by 43 basis points. By 2030, when Korea’s government debt is expected to reach 2,000 trillion won, bond yields are projected to rise to 4.85%, ceteris paribus. Notably, 60% of the projected yield increase is attributed to the inelastic demand of insurance companies. This underscores the importance of adjusting the investor composition of the government bond market, with a greater share of investors with higher demand elasticity to alleviate pressure on borrowing cost.

Summary

Policy Study KOR A Study on Property Tax Incidence

This study examines the incidence of property taxes, focusing on whether the property tax, which is levied on the property owner when the owner and the user are different, is passed on to the user. If the tax is borne by the owner, it acts as a capital tax; if passed to the user, it functions as a consumption tax. Additionally, if the revenue from the tax is used to improve local environments, it could be considered a benefit tax.

Through empirical analysis, the study explores how changes in the comprehensive property tax system affect housing rental prices. The findings show that these changes have little impact on the rental market. No evidence was found to suggest that rental prices increase as the publicly assessed value rises near the taxable threshold. Moreover, using a difference-in-differences method to compare rental prices before and after the policy change, the analysis confirms that the strengthened system did not lead to higher rental prices for properties subject to the tax.

In conclusion, the results suggest that the tax is best viewed as a capital tax. Taxing housing assets may reduce investment and hinder the efficient allocation of capital. Since South Korea's property tax level is in line with the OECD average, it is important to minimize changes to the system, analyze its effects, and then proceed with reforms.

Summary

Policy Study KOR Economic Effects of Capital Gains Tax on Housing

This study examines the economic effects of South Korea’s capital gains tax reforms on housing, focusing on the lock-in effect ― a contraction in housing transactions following higher tax rates. In 2017, amid a prolonged housing boom, the government raised capital gains tax rates for multi-homeowners. Analysis of transaction volumes and prices around the announcement and implementation reveals a pre-reform surge in sales and gifts, followed by a post-reform decline. A temporary suspension of the tax in 2019 again triggered a short-term uptick in transactions during the grace period.

These findings suggest the tax policy failed to achieve its intended goal of stabilizing the housing market. The lock-in effect, compounded by low policy credibility, likely contributed to diminished public trust in housing policy. Moving forward, housing tax reforms should be anchored to fundamental taxation principles, prioritizing efficiency and equity while promoting system stability to ensure predictable obligations for taxpayers and bolster confidence in the housing market.

Summary

Policy Study KOR Capital Flows and Challenges in the Digital Age: Focusing on Central Bank Digital Currencies (CBDCs)

As the digitalization of finance accelerates, discussions on the adoption of Central Bank Digital Currencies (CBDCs) are gaining momentum, particularly among G20 nations. This development calls for examining the potential impacts of CBDC implementation on both domestic and international financial markets and capital flow, alongside exploring appropriate response strategies. Upon reviewing the status and background of CBDC adoption among G20 countries, setting up a unified CBDC platform for this group in the short term is highly unfeasible. Instead, some emerging economies are expected to introduce retail CBDCs to enhance payment infrastructure or conduct experiments linking wholesale CBDCs for cross-border payments. Should CBDCs be adopted globally, the speed and scale of international capital movements could increase, potentially amplifying the volatility of capital flows and currency values. In order to ensure the effectiveness of capital flow management policies already in place, it is crucial to foster close cooperation between major central banks on CBDC integration. Moreover, efforts should be made to maximize the benefits of the new payment systems introduced by CBDCs. These efforts include revising financial regulations and upgrading infrastructure by implementing open foreign exchange regulations, maintaining balanced oversight of fintech firms, and enhancing the efficiency of existing payment and settlement infrastructures.

Summary

Policy Study KOR CBDC-based New Banking System, Bank Runs, and Efficient Allocation

Digital financial innovation drives the development of the financial industry, offering new benefits to financial consumers. However, as demonstrated by the 2023 bank run involving Silicon Valley Bank, it also heightens the risk of digital bank runs. In exploring how to prevent bank runs while ensuring the efficiency of financial intermediation, this study examines a new banking system proposed in Europe, the CBDC next-level model: A central bank issues retail Central Bank Digital Currency (CBDC) to monopolize demand deposit-taking and supply these funds as pass-through funding to commercial banks. In turn, banks provide loans to private borrowers using these funds. This system removes barriers to entry in the loan market to allow for free competition among commercial banks, fintechs, and Big Tech companies, thereby introducing perfect competition. Rigorous theoretical analysis in this study shows that this novel system could eliminate bank runs while achieving socially optimal levels of financial intermediation. Nonetheless, this model also presents some limitations, such as the centralization of personal information by the central bank and the potential political influence over lending decisions.

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