2013年-IMF国际货币组织全球_Country_Transparency_and_the_Global_Transmission_of_Financial_Shocks_38页_1mb

Summary of "Country Transparency and the Global Transmission of Financial Shocks"

Core Content

This working paper by Luis Brandao-Marques, Gaston Gelos, and Natalia Melgar explores the relationship between country-level transparency and the transmission of global financial shocks to emerging markets. The authors argue that opacity—defined as the lack of availability and reliability of information about a country's public and private sectors—can amplify the impact of financial shocks originating from developed financial centers. The paper combines theoretical modeling with empirical analysis to demonstrate how ambiguity in financial markets affects investor behavior and asset price volatility.

Main Contributions

1. Theoretical Model

• The paper presents a simple model of financial markets under Knightian uncertainty, where investors face ambiguity about the underlying probability distribution of returns.
• In this model, investors in financial centers have better information and are more familiar with the fundamentals of developed markets, while emerging markets are characterized by higher opacity.
• The model shows that more opaque markets react more strongly to signals from financial centers, because investors perceive these markets as riskier and interpret signals as more likely to reflect fundamental shocks.
• The price sensitivity to signals from developed markets is not due to noisier signals, but rather to incomplete information and ambiguity in the emerging market's fundamentals.

2. Empirical Evidence

• Using data from 1997 to 2011, the authors find that emerging markets with lower transparency react more strongly to global financial shocks (measured by the VIX index).
• The empirical results are consistent across bond and equity markets.
• The findings hold even when controlling for risk, credit quality, liquidity, and other factors.
• The paper highlights the importance of transparency in mitigating the unpleasant side effects of financial globalization, such as volatility and capital flow instability.

Key Findings

a. Bond Market Results

• The bond spread in emerging markets is more sensitive to changes in the VIX when the country is more opaque.
• This effect is linear and asymmetric, depending on the level of transparency.
• The results are robust to various controls and interactions with time trends and market integration measures.

b. Equity Market Results

• Equity returns in emerging markets also show greater sensitivity to VIX changes in more opaque countries.
• The asymmetric effects are also observed, with more opaque markets overreacting to positive and negative signals from developed markets.
• The authors include controls such as exchange rate changes, sovereign risk, and financial crises to isolate the effect of transparency.

Key Variables and Data Sources

1. Returns

• Bond Returns: Based on changes in the EMBI Global return index.
• Equity Returns: Based on MSCI stock market total return indices, adjusted for the U.S. 3-month T-bill rate to calculate excess returns.

2. Global Factors

• VIX Index: A proxy for market volatility and risk aversion in financial centers.
• The VIX is used to capture global financial shocks and their impact on emerging markets.

3. Transparency Measures

• Opacity Index (Opacit): A composite index based on surveys of banks, firms, equity analysts, and in-country staff in 35 countries, covering areas like corruption, legal system, government policies, accounting standards, and regulatory regime.
• Corruption Perceptions Index (Corrup): A measure of corruption levels, used as a proxy for opacity.
• Corporate Opacity (Corpop): Based on the World Economic Forum's Global Competitiveness Report, measuring the level of financial disclosure.
• Transparency of Government Policies (TGP): Also from the Global Competitiveness Report, measuring how well firms are informed about policy changes.
• Wilshire Score (W_as): A measure of accounting standards, used to assess the permissibility of equity markets for investment.

4. Controls

• U.S. 3-Month T-Bill Rate: Used as a proxy for interest rates.
• Exchange Rate: Measured as the percentage change against the U.S. dollar.
• Dividend Yield: Implicit in the MSCI indices, used to capture expected returns.
• Market Integration: Measured by trade openness and capital openness.
• Sovereign Risk: Based on Standard & Poor's Rating and Outlook Index.
• Financial Crises Dummies: To capture periods of banking, currency, and debt crises.
• Capital Controls: Based on the IMF's AREAER database, measuring restrictions on foreign investment.

Implications

• Emerging markets are not helpless in the face of global financial shocks; increasing transparency can help mitigate volatility and reduce the adverse effects of financial globalization.
• Country-level transparency is crucial for effective governance and reducing investor uncertainty.
• Improving information availability, corporate disclosure standards, and legal frameworks can lead to more stable financial markets and better risk assessment.

Conclusion

• The paper emphasizes that transparency plays a critical role in shaping the international transmission of financial shocks.
• It suggests that greater transparency can help emerging markets become more resilient to global market fluctuations.
• The results support the idea that financial globalization can be beneficial, but only if country-level transparency is improved to reduce uncertainty and volatility.

References to Supporting Evidence

• The authors use correlation tables (Table 1) to show the relationship between opacity, risk, and liquidity.
• Summary statistics (Table 2) provide an overview of the variables used in the analysis.
• Table 3 and 4 show linear and asymmetric effects of global shocks on bond spreads and transparency.
• Table 5 and 6 show similar results for stock returns.
• Table 7 and 8 include country risk ratings and market liquidity.
• Table 9 presents Granger Causality tests between opacity and volatility.

Methodological Notes

• The empirical strategy involves regression models with interactions between VIX changes and opacity measures.
• Driscoll-Kraay standard errors are used to account for spatial and temporal dependence in the data.
• Year dummies are included to control for common shocks.
• Market integration is considered through trade and capital openness measures.

Final Takeaway

• Country transparency significantly affects the volatility and responsiveness of emerging markets to global financial shocks.
• The paper provides empirical support for the idea that increased transparency can help reduce the negative impacts of financial globalization and improve market stability.