Does sovereign debt ratings news spill over to international stock markets?

The evidence here indicates that sovereign debt rating and credit outlook changes of one country have an asymmetric and economically significant effect on the stock market returns of other countries over 1989–2003. There is a negative reaction of 51 basis points (two-day return spread vis-á-vis the US) to a credit ratings downgrade of one notch in a common information spillover around the world. Upgrades, however, have no significant impact on return spreads of countries abroad. Closeness (e.g., geographic proximity) and emerging market status amplify the effect of a spillover. Downgrade spillover effects at the industry level are more pronounced in traded goods and small industries.     

Are international accounting standards more credit relevant than domestic standards?

We examine whether the credit relevance of financial statements, defined as the ability of accounting numbers to explain credit ratings, is higher after firms are required to report under International Financial Reporting Standards (IFRS). We find an improvement in credit relevance for firms in 17 countries after mandatory IFRS reporting is introduced in 2005; this increase is higher than that reported for a matched sample of US firms. The increase in credit relevance is particularly pronounced for higher risk speculative-grade issuers, where accounting information is predicted to be more important; and for IFRS adopters with large first-time reconciliations, where the impact of IFRS is expected to be greater. These tests provide reassurance that the overall enhancement in estimated credit relevance is driven by accounting changes related to IFRS adoption. Our results suggest that credit rating analysts’ views of economic fundamentals are more closely aligned with IFRS numbers, and that analysts anticipate at least some of the effects of the IFRS transition.     

Economic policy uncertainty and sovereign credit rating decisions: Panel quantile evidence for the Eurozone

We employ a panel quantile framework that quantifies the relative importance of quantitative and qualitative factors across the conditional distribution of sovereign credit ratings in the Eurozone area. We find that regulatory quality and competitiveness have a stronger impact for low rated countries whereas GDP per capita is a major driver of high rated countries. A reduction in the current account deficit leads to a rating or outlook upgrade for low rated countries. Economic policy uncertainty impacts negatively on credit ratings across the conditional distribution; however, the impact is stronger for the lower rated countries. In other words, the creditworthiness of low rated countries takes a much bigger ‘hit’ than that of high rated countries when European policy uncertainty is on the rise.     

Foreign exchange market reactions to sovereign credit news

We analyse the reaction of the foreign exchange spot market to sovereign credit signals by Fitch, Moody’s and S&P during 1994–2010. We find that positive and negative credit news affects both the own-country exchange rate and other countries’ exchange rates. We provide evidence on unequal responses to the three agencies’ signals. Fitch signals induce the most timely market responses, and the market also reacts strongly to S&P negative outlook signals. Credit outlook and watch actions and multiple notch rating changes have more impact than one-notch rating changes. Considerable differences in the market reactions to sovereign credit events are highlighted in emerging versus developed economies, and in various geographical regions.     

Fiscal Transparency,Fiscal Performance and Credit Ratings

Fiscal transparency can provide policymakers with incentives to adopt better policies by enhancing the public debate on the design and sustainability of fiscal policy and establishing accountability for their implementation. Fiscal transparency can also reduce uncertainty about fiscal policy and fiscal outturns by providing more information on the underlying fiscal position and fiscal risks. Both effects suggest that countries should benefit from adopting transparency enhancing policies through better market assessments of their sovereign risk. In this paper, we investigate whether fiscal transparency has an effect on market perceptions of sovereign risk, as measured by sovereign credit ratings, and if so, through which channels. We find that fiscal transparency has a positive and significant effect on ratings – one standard deviation increase in fiscal transparency increases credit ratings by 0.7 and 1 notches (or steps in the credit rating scale) in advanced and developing economies, respectively – but its effect works through different channels in advanced and developing economies. In advanced economies, fiscal transparency is associated with better fiscal outcomes, leading indirectly to higher credit ratings. In developing economies, the direct uncertainty‐reducing effect of fiscal transparency seems to be more important. Indeed, the effect of fiscal transparency on fiscal performance is found to increase with the level of institutional development.     

Variations in sovereign credit quality assessments across rating agencies

We investigate agency variation in credit quality assessment (Standard and Poor’s vs. Moody’s vs. Fitch) employing sovereign ratings data for 129 countries, spanning the period 1990–2006. While we find that the credit rating agencies often disagree about credit quality, it is usually confined to one or two notches on the finer scale. We find that several variables have varying importance in explaining ratings across agencies which leads us to conclude that material heterogeneity exists between them. Also, while watch and outlook procedures are generally strong predictors of rating changes relative to other public data, additional significant variables suggest that it might be possible to augment these agency data to provide better forecasts of future rating changes.     

Managerial ability and bond rating changes

This study examines the relation between managerial ability and bond credit rating changes. We attempt to add to the credit rating agency literature by exploring the role managerial ability plays in the initial bond rating assignments and in rating changes. We predict firms with more‐able managers are more likely to have higher bond ratings and to be more able to have a positive influence on rating changes. We find a significant and positive relation between managerial ability and change in credit ratings, suggesting that more‐able managers can take effective actions to improve their credit ratings.     

The reaction of emerging market credit default swap spreads to sovereign credit rating changes

This paper examines the effect of sovereign credit rating change announcements on the CDS spreads of the event countries, and their spillover effects on other emerging economies’ CDS premiums. We find that positive events have a greater impact on CDS markets in the two-day period surrounding the event, and are more likely to spill over to other emerging countries. Alternatively, CDS markets anticipate negative events, and previous changes in CDS premiums can be used to estimate the probability of a negative credit event. The transmission mechanisms for positive events are the common creditor and competition in trade markets.     

Transparency,idiosyncratic risk,and convertible bonds

We first investigate the relationship among a company's information transparency, idiosyncratic risk, and return of its convertible bonds. The effects of a company's idiosyncratic risk on its equity's value volatility and its credit risk are also examined. The findings indicate that when a company discloses a significant amount of information, it is likely to have a higher idiosyncratic risk and a lower credit risk, with no impact on returns on convertible bonds. The volatility of stock returns is positively related to returns on convertible bonds, and it is found that diversified strategies and returns on a company's equity help to improve its credit rating and that a better credit rating triggers an increase in returns on convertible bonds and idiosyncratic risk, indicating that evaluations of the value of convertible bonds must take pure bonds and equity (option) values into account. After excluding conversion values and estimating the idiosyncratic risk on daily, weekly, and monthly bases, this study suggests that there is a positive relation between returns on convertible bonds and information transparency when estimating idiosyncratic risk on a monthly basis and that a positive association also exists between credit rating, idiosyncratic risk, and returns on bonds.     

News spillovers in the sovereign debt market

We study the effect of a sovereign credit rating change of one country on the sovereign credit spreads of other countries from 1991 to 2000. We find evidence of spillover effects; that is, a ratings change in one country has a significant effect on sovereign credit spreads of other countries. This effect is asymmetric: positive ratings events abroad have no discernable impact on sovereign spreads, whereas negative ratings events are associated with an increase in spreads. On average, a one-notch downgrade of a sovereign bond is associated with a 12 basis point increase in spreads of sovereign bonds of other countries. The magnitude of the spillover effect following a negative ratings change is amplified by recent ratings changes in other countries. We distinguish between common information and differential components of spillovers. While common information spillovers imply that sovereign spreads move in tandem, differential spillovers are expected to result in opposite effects of ratings events across countries. Despite the predominance of common information spillovers, we also find evidence of differential spillovers among countries with highly negatively correlated capital flows or trade flows vis-á-vis the United States. That is, spreads in these countries generally fall in response to a downgrade of a country with highly negatively correlated capital or trade flows. Variables proxying for cultural or institutional linkages (e.g., common language, formal trade blocs, common law legal systems), physical proximity, and rule of law traditions across countries do not seem to affect estimated spillover effects.     

基于逆周期的主权信用评级指标体系研究

现行国际主权信用评级呈现出明显的顺周期特征而广受诟病。在对评级指标体系优化的基础上,采用90个主权国家2005~2012年经济数据进行面板随机效应和门限效应回归,对主权信用评级决定模型进行估计,运用欧债危机发生前后的数据进行模拟评级,结果表明：优化后的指标体系显示出较好的逆周期特征。     

The impact of sovereign credit ratings on Eurobond yields: Evidence from Africa

The importance of sovereign credit ratings and Eurobonds issued by governments have come to the fore in Africa in the last decade. We examine whether changes in sovereign credit ratings impact Eurobond yields in 8 countries over the period of 2014–2019. Our approach reviews rating changes impact on Eurobond yields utilising the event study methodology. Our findings reflect that, on average, close to a third of rating actions directly impact bond yields in African countries. The statistically significant events include the downgrades of South Africa and Namibia to non-investment grade in 2017 reflecting critical transitions and bond investors’ reactions. Overall, the low percentage of a third, relative to previous international studies, suggests that largely rating changes are anticipated, do not have much new information and perhaps the perceived power of credit rating agencies may be overstated. In our view, the results reflect that pre-announcements of rating review dates since 2014 makes rating actions predictable and less impactful to bond yields. In addition, they reflect that bond investors adjust in real time as new information come in, resulting in less reliance on the opinions of CRAs and using their own assessments.     

INTERNATIONAL BANK FLOWS TO EMERGING MARKETS: INFLUENCE OF SOVEREIGN CREDIT RATINGS AND THEIR REGIONAL SPILLOVER EFFECTS

We examine whether changes in sovereign credit assessments help determine international bank flows to emerging countries. We focus on the bank flows of G7 countries to a sample of 55 emerging market borrowers for 1995–2008. We find evidence indicating that sovereign credit rating revisions have significant and positive influences on international bank flows from developed markets even after controlling for other determinants. In addition, we find strong regional rating spillover effects. Ratings improvements in one emerging market region tend to reduce bank flows to the other regions. However, there is an exception from the Asia Pacific to Eastern Europe.     

我国的主权信用评级被低估了吗

本文以1996—2011年间45个国家的宏观经济数据和惠誉的主权信用评级数据,运用一般面板线性回归和有序概率模型研究了我国的主权信用评级是否被低估的问题。结果发现,国际评级机构并没有刻意低估我国的主权信用评级,其对我国主权信用评级的测算方法并不明显有别于其他国家。但是,由于评级体系的倾向性和我国地方政府债务不透明等原因,导致我国的主权信用评级客观上存在被低估的可能。     

The Effect of Bond Rating Changes and New Ratings on UK Stock Returns

This is the first study to use daily data from a major capital market outside of the US to examine the role of corporate bond and commercial paper rating changes on common stock returns. Using data published by Standard and Poors' credit rating agency between 1984 and 1992, we examine the impact of new credit ratings, credit rating changes and Credit Watch announcements on UK common stock returns. We find significant negative excess returns around the date of a downgrade and positive returns close to the date of a positive CreditWatch announcement. Hence, the financial markets would appear to place some importance on rating agency pronouncements in the UK. New ratings, whether short or long-term, have no significant impact on returns. We also attempt to quantify the impact of a new credit rating upon firm cost of capital through measures of conditional volatility and systematic risk. However, we find only weak evidence to suggest that a stock's cost of capital is reduced after a long-term credit rating is awarded for the first time.     

The use of earnings and operations management to avoid credit rating downgrades

Firms placed on negative credit watch face the threat of a credit rating downgrade. At the same time, they are given the opportunity to put recovery efforts in place to retain their current credit rating. In this paper, we test to what extent firms use earnings management as a short-term recovery strategy. We find that both accruals-based and real earnings management are associated with firms avoiding credit rating downgrades, and that these alternative earnings management strategies tend to be complements rather than substitutes. However, following the passage of the Sarbanes–Oxley Act, only real earnings management is significantly associated with the credit watch outcome. We find evidence that firms which maintain their rating via earnings management are better able to afford the inevitable earnings reversals, and that in the year following the credit watch period, the credit rating performance of these firms is significantly better than firms which undergo a downgrade, with fewer downgrades and more upgrades in this period. Our results also imply that credit rating agencies are not misled by earnings management but rather allow for some discretion in reporting earnings that facilitates the dissemination of private information about future firm performance.     

融资约束对企业出口影响的Heckman验证-基于银行信用风险的视角

基于中国工业企业数据库1998-2014年7032家企业的平衡面板数据,从银行信用风险内部评级的视角,研究融资约束对企业出口的影响.结果表明:银行信贷融资约束与企业的出口决策及出口强度间有显著负相关关系.同时,使用Heckman二阶段模型研究发现:不同形式的商业信用对企业出口决策及出口强度的影响和作用机制会因企业所处供求端位置的不同而存在差异.其中,需求端的商业信用仅与企业出口决策显著正相关,而与出口强度的相关性并不显著;供给端的商业信用则与企业出口强度显著负相关.     

Sovereign Credit Risk,Banks' Government Support,and Bank Stock Returns around the World

We explore the joint effect of expected government support to banks and changes in sovereign credit ratings on bank stock returns using data for banks in 37 countries between 1995 and 2011. We find that sovereign credit rating downgrades have a large negative effect on bank stock returns for those banks that are expected to receive stronger support from their governments. This result is stronger for banks in advanced economies where governments are better positioned to provide that support. Our results suggest that stock market investors perceive sovereigns and domestic banks as markedly interconnected, partly through government guarantees.     

信用评级行业竞争和规制:美国的经验和启示

美国信用评级行业高度集中,标普、穆迪是评级市场的统治者。美国证券交易委员会对国家认可的统计评级机构(NRSROs)的指定以及基于监管目的广泛使用NRSROs概念导致评级行业的准入壁垒。声誉资本、网络效应以及评级透明也是影响信用评级行业竞争状况的因素。为了增进评级行业竞争,美国已经加强对信用评级机构的法律监管,并正在酝酿新一轮的竞争规制措施和改革方案。美国的经验和做法对于我国刚刚起步的信用评级行业的发展具有借鉴意义。     

Determinants of Sovereign Eurobonds Yield Spread

We examine the determinants of sovereign Eurobond spread at issuance covering 1991–2000. The results of the regression models showed that yield spread increases with maturity, issue size and gross fees and decreases with credit rating and the number of managers. Higher‐grade issuers also pay a relatively higher spread to borrow long‐term funds and for smaller issues. The findings are consistent with the notion of a term structure 'liquidity premium.' Low‐grade issuers pay a higher spread than better‐rated countries. However, low‐grade countries pay high spread for larger funds. Credit rating is found to provide additional information in explaining the spread on sovereign Eurobonds beyond that provided by macroeconomic variables.