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Statistical Inference for Time-changed Brownian Motion Credit Risk Models
Credit risk structural model rst passage problem Levy process fast Fourier transform credit default spread maximum likelihood estimation
2011/3/23
We consider structural credit modeling in the important special case where the log-leverage ratio of the firm is a time-changed Brownian motion (TCBM) with the time-change taken to be an independent i...
Precautionary Measures for Credit Risk Management in Jump Models
Credit risk management Double exponential jump diffusion Spectrally negative L´ evy processes
2010/10/19
Sustaining efficiency and stability by properly controlling the equity to asset ratio is one of the most important and difficult challenges in bank management. Due to unexpected and abrupt decline of...
Credit Risk, Market Sentiment and Randomly-Timed Default
Credit Risk Market Sentiment Randomly-Timed Default
2010/10/20
We propose a model for the credit markets in which the random default times of bonds are assumed to be given as functions of one or more independent "market factors". Market participants are assumed t...
The Impact of Credit Risk and Implied Volatility on Stock Returns
Credit Risk Implied Volatility Stock Returns
2010/10/20
This paper examines the possibility of using derivative-implied risk premia to explain stock returns. The rapid development of derivative markets has led to the possibility of trading various kinds of...
Credit Calibration with Structural Models: The Lehman case and Equity Swaps under Counterparty Risk
Credit Default Swaps StructuralModels Black Cox Model, Calibration
2010/11/3
In this paper we develop structural first passage models (AT1P and SBTV)with time-varying volatility and characterized by high tractability, moving from the original work of Brigo and Tarenghi (2004, ...
We give a comprehensive review of credit term structure modeling methodologies. The conventional approach to modeling credit term struc-ture is summarized and shown to be equivalent to a particular ty...
Analytical Framework for Credit Portfolios. Part I: Systematic Risk
Analytical Framework Credit Portfolios Systematic Risk
2010/11/2
Analytical, free of time consuming Monte Carlo simulations, framework for credit portfolio systematic risk metrics calculations is presented. Techniques are described that allow calculation of portfol...
Dual Quantization for random walks with application to credit derivatives
Quantization Backward Dynamic programming Random Walks
2010/11/2
We propose a new Quantization algorithm for the approximation of inhomogeneous random walks, which are the key terms for the valuation of CDO-tranches in latent factor models. This approach is based o...
An application to credit risk of a hybrid Monte Carlo-Optimal quantization method
credit risk structural approach survival probability partial informainformation filtering optimal quantization Monte Carlo method
2010/11/1
In this paper we use a hybrid Monte Carlo-Optimal quantization method to approximate the conditional survival probabilities of a firm, given a structural model for its credit default, under partial in...
Haar Wavelets-Based Approach for Quantifying Credit Portfolio Losses
Haar Wavelets-Based Quantifying Credit Portfolio Losses
2010/11/1
This paper proposes a new methodology to compute Value at Risk (VaR) for quan-tifying losses in credit portfolios. We approximate the cumulative distribution of the loss function by a nite combinatio...
The credit crisis of 2007 and 2008 has thrown much focus on the models used to price
mortgage backed securities. Many institutions have relied heavily on the credit ratings
provided by credit agency...
Credit models and the crisis, or: how I learned to stop worrying and love the CDOs
Credit Crisis Credit Derivatives Gaussian Copula Model Implied Correla-tion Base Correlation Compound Correlation Implied Copula
2010/11/3
We follow a long path for Credit Derivatives and Collateralized Debt Obliga-tions (CDOs) in particular, from the introduction of the Gaussian copula model and the related implied correlations to the i...
Dynamic Estimation of Credit Rating Transition Probabilities
Credit Rating Transition Probabilities
2010/11/3
We present a continuous-time maximum likelihood estimation methodology for credit rating
transition probabilities, taking into account the presence of censored data. We perform
rolling estimates of ...
Defining, Estimating and Using Credit Term Structures. Part 3: Consistent CDS-Bond Basis
Estimating Credit Term Structures Consistent CDS-Bond Basis
2010/11/3
In the third part of this series we introduce consistent relative value measures for CDS-Bond
basis trades using the bond-implied CDS term structure derived from fitted survival rate
curves. We expl...
Defining, Estimating and Using Credit Term Structures. Part 2: Consistent Risk Measures
Estimating Term Structures Consistent Risk Measures
2010/11/3
In the second part of our series we suggest new definitions of credit bond duration and
convexity that remain consistent across all levels of credit quality including deeply distressed bonds and intr...