Calibrating the LMN Model based on the J-law to Implement the Credit Risk in the Economic Scenarios Generator
Chaouch, Leila · Jerbi, Yacin
International Journal of Finance & Banking Studies · 2026 · Vol. / Issue · 125-130
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Abstract
The aim of this paper is to calibrate the Longstaff, Mithal and Neis (2005) model (LMN model) based on the J-law (see Jerbi (2015) to implement the credit risk in the economic scenarios generator. The LMN model, based on the assumptions of the normality of the risks is used to establish a link between the spread, the probability of default and the liquidity risk. The related assumptions seem unrealistic given the depth of the distribution that characterizes the financial and economic data. In this context, we develop an LMN model based on the J-law taking into account the effects of Skewness and Kurtosis related to the two series of the CDS premium and the corporate bond prices. We use a simulated data that are from January 2009 to December 2016. We estimate the model parameters. The LMN model based on the J-law fit better with the reality than the one based on the normal Law.
Keywords: {'name': 'LMN model, credit risk, Economic scenarios generator (ESG), J-process, Skewness, Kurtosis'}
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Chaouch, Leila
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Jerbi, Yacin
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