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Chinese Journal of Management Science ›› 2025, Vol. 33 ›› Issue (3): 80-92.doi: 10.16381/j.cnki.issn1003-207x.2022.0634

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MIDAS-SVQR: A Novel Model for Measuring VaR of Supply Chain Finance Pledge

Liukai Wang, Xiaobo Zhang, Weiqing Wang(), Cheng Liu   

  1. The School of Economics and Management,University of Science and Technology Beijing,Beijing 100089,China
  • Received:2022-03-29 Revised:2022-08-10 Online:2025-03-25 Published:2025-04-07

Abstract:

Pledged inventory is one of the typical financing modes of supply chain finance (SCF), and the fluctuation of pledge value is the main risk faced by SCF. Therefore, how to measure the risk of pledge value fluctuation is the focus of SCF's risk management. as many previous works have shown, Value at Risk (VaR), which is mainly promoted by the Basel accord, is widely used in academic and industry for risk measures. However, the conventional VaR measures approaches have three challenges: 1) the true distribution of the data is not known, so the distribution assumption is prone to mistakes; 2) it is difficult to accurately describe the nonlinear relationship between variables; 3) the mixed frequency data is not fully utilized. To address the above issues, the combination of mixed data sampling (MIDAS) and support vector quantile regression (SVQR), namely MIDAS-SVQR model, are first applied to improve the performance of pledge’s VaR measure. The novel approach uses kernel functions to deal with nonlinear relationships and directly outputs quantiles without any distribution assumptions; meanwhile, it uses MIDAS to process the mixed frequency data to increase the ability of the model to extract the information from the mixed frequency data. To illustrate the efficacy of our method, empirical studies on six representative pledges include steel, copper, lead, zinc, and tin. The data is collected from Wind (https://www.wind.com.cn/) and covers the period from Jan 1, 2007 to August 31, 2021. Then, the proposed model is compared with the classical model (GARCH), quantile regression (QR), SVQR and MIDAS-QR in terms of Kupiec test, conditional converage test and VaR duration test. The empirical results are promising and show that our method (with the highest average P value of the three backtests across all samples) outperforms the others. Moreover, it is found that the quantile regression models generally perform significantly better than the GARCH models. In future, reversed (un)restricted MIDAS can be incorporated into SVQR to enable model to use more mixed frequency data. To this end, this is an interesting topic and we leave it for future research.

Key words: supply chain finance, Value at Risk, MIDAS-SVQR, mixed-frequency data, support vector quantile regression

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