Hyunduk Suh

Macroprudential Policy: Its Effects and Relationship to Monetary Policy

This paper examines the interactions of macroprudential policy and monetary policy in a New Keynesian DSGE model with financial frictions. Macroprudential policy can stabilize credit cycles. However, a macroprudential instrument that aims to stabilize a specific segment of the credit market can cause regulatory arbitrage, that is, a reallocation of credit to a less regulated part of the market. Within this model, welfare-maximizing monetary policy aims to stabilize only inflation and macroprudential policy only stabilizes credit. Two aspects of the model account for this dichotomy. First, credit stabilization is welfare improving because lower volatility is compensated by higher mean equilibrium credit and capital. Second, monetary policy is sub-optimal for credit stabilization. The reason is that it operates on the decisions of borrowers and savers, while macroprudential policy operates only on the decisions of borrowers.

What Forms and Reforms Banking Regulations? A Cross-National Study

Abstract: We examine the determinants of regulatory frameworks in the banking sector using an extensive data set of regulations of more than 180 countries. In contrast with previous studies, we analyze multiple aspects of regulations independently in terms of their objects and functions, controlling for political and economic conditions that might affect regulatory structures. We find that each dimension of regulations is determined by different factors, and the incentives for the formulation of regulations differ between emerging and developed economies. Emerging economies regulate banking activities, entry, and foreign bank operations more tightly than do developed economies; however, emerging economies impose fewer restrictions on private monitoring requirements.

Money Market Reform in Korea and Its Effects on the Overnight Call–Repurchase Agreement Rate

ABSTRACT The Korean government implemented money market reform after the global financial crisis, aiming to develop the repurchase agreement (RP, repo) market. In this article, I analyze the reform and its effects on money markets. Results show that the reform strengthened the functionality of the RP market and the monetary policy transmission channel to it. The error correction model indicates that although the adjustments to the equilibrium occurred through the call rate during the global financial crisis, they were processed through the RP rate in later periods. The ability of the RP rate to inform market liquidity conditions has improved.

바젤III 은행 경기대응완충자본 규제의 기준지표에 대한 연구 (Finding Indicator Variables for Countercyclical Capital Buffer: The Case of Korea)

Countercyclical capital buffer in Basel III is a macropudential tool that aims to reduce procyclicality in financial intermediation. It requires banks to set aside additional capital buffer in times of credit overheating, and allows them to release the buffer when a breakdown in credit intermediation is imminent. To operationalize this buffer, it is important to find information variables that enable policymakers to determine whether current credit activities are overheated, to the extent that it can lead to a significant financial crisis afterwards. We explore indicator variables necessary for implementing countercyclical capital buffer in Korea. To do so, we first collect 42 variables in 7 sectors including credit aggregates, financial markets, and macroeconomic variables. We then evaluate the past performance of those variables to predict financial crises in Korea since 1981, using AUROC(area under receiver operating characteristic), loss function, and noise-to-signal ratio. The results show that credit variables such as the credit to non-financial firms and households are the most useful in determining when to build up the buffer, and so are financial market variables such as credit spread in determining when to release the buffer. A multi-variable approach, using mostly credit aggregate variables, has high explanatory power on the occurrence of past financial crises.