The Influence of Rating Changes on Bonds

Inhaltsverzeichnis (Table of Contents)

• Introduction
• Presentation of the Problem
• Basic Concepts
• Objective and Structure of the Thesis
• Rating of Corporate Bonds
• Definition and Role of Credit Rating on the Capital Market
• Historical Development
• Rating Classification
• The Rating Process
• Organization
• Analysis Criteria of Rating Agencies
• Qualitative Aspects in the Analysis of Company Risk
• Quantitative Aspects in the Analysis of Company Risk
• The Rating Market of Corporate Bonds
• The Influence of Rating Changes on Bonds
• The Interdependence between Bond Credit Risk and Rating
• Bond Ratings and Credit Risk
• Theoretical Models for Credit Risk Evaluation
• Statistical Prediction of Default Likelihood - Stochastic Processes
• Option-theoretic Approach
• Credit Rating Models in Practice
• Migration Analysis
• Credit Risk Practical Applications
• Influence of Rating Changes on Bonds in Theory and Practice
• Rating in the Neoclassical Financial Theory
• The Concept of Information Efficient Markets
• Theoretical Relevance of Rating in Efficient Markets
• Information Basis of Rating Verdicts
• Hypotheses about Influence of Rating Changes on Bonds Prices
• Rating in Real Capital Markets – Empirical Research
• Event Studies
• Conclusions
• Explanations of Divergences between Theoretical and Empirical Research
• The Non-equidistant Character of Rating Verdicts
• Different Definitions of Risk
• Investment Regulations and Restrictions
• Significant Examples of Rating Influence on Corporate Bonds
• Telefonica
• General Motors
• Influence of Rating Changes of a Bond on other Investment Alternatives
• Contemporary Aspects of Rating Influence on Capital Markets
• Rating in Germany
• Rating of Landesbanken and Savings Bank
• Rating and Basel II
• Possibilities and Limits of Rating

Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)

This thesis examines the impact of rating changes on the pricing of corporate bonds, aiming to provide a comprehensive analysis from both theoretical and empirical perspectives. It investigates the relationship between credit risk and rating, explores the role of rating agencies in the capital market, and analyzes the influence of rating changes on bond yields. The research is grounded in neoclassical financial theory and incorporates empirical studies to understand how rating decisions affect real-world market behavior.

• The interrelationship between credit risk and rating
• The impact of rating changes on bond prices
• The theoretical and empirical evidence of rating influence on the capital market
• The role of rating agencies in providing information and shaping market dynamics
• The implications of rating changes for investors and market participants

Zusammenfassung der Kapitel (Chapter Summaries)

• Introduction: This chapter introduces the research topic by defining the problem, presenting the basic concepts related to credit risk and rating, and outlining the thesis's objectives and structure.
• Rating of Corporate Bonds: This chapter discusses the definition, role, historical development, and classification of credit ratings in the capital market. It also details the rating process, including the organization, analysis criteria, and qualitative and quantitative aspects considered by rating agencies.
• The Influence of Rating Changes on Bonds: This chapter examines the relationship between bond credit risk and rating, analyzing theoretical models for credit risk evaluation and credit rating models used in practice. It further investigates the theoretical and empirical evidence of rating influence on bond prices, discussing hypotheses about the impact of rating changes and presenting findings from event studies.

Schlüsselwörter (Keywords)

The primary focus of this thesis revolves around corporate bonds, credit risk, and the influence of rating changes on bond pricing. Key themes include theoretical models for credit risk evaluation, empirical research on the impact of rating changes, and the role of rating agencies in shaping market dynamics. Relevant terms include bond ratings, credit spreads, event studies, migration analysis, and the concept of information efficient markets.

Frequently Asked Questions

How do rating changes influence corporate bond prices?

Rating changes signal new information about a company's credit risk; a downgrade typically leads to higher yields and lower bond prices, while an upgrade does the opposite.

What criteria do rating agencies use for bond evaluation?

Agencies analyze both qualitative aspects (management quality, industry risk) and quantitative aspects (financial ratios, cash flow, debt levels) of a company.

What is the concept of "Information Efficient Markets"?

It is a theory suggesting that all available information is already reflected in security prices, raising questions about whether ratings provide truly "new" information.

What is migration analysis in credit risk?

Migration analysis tracks the movement of bonds between different rating categories over time to assess the stability of credit risk.

How does Basel II relate to bond ratings?

Basel II regulations use credit ratings to determine the amount of capital banks must hold against their assets, making ratings crucial for market liquidity.

Why did insolvencies like Enron spark debate about ratings?

Cases where highly-rated companies failed suddenly led to criticism that rating agencies might be too slow to react or fail to detect fundamental financial problems.