Financial Econometrics and Machine Learning

A special issue of Mathematics (ISSN 2227-7390). This special issue belongs to the section "Financial Mathematics".

Deadline for manuscript submissions: 31 March 2025 | Viewed by 2494

Special Issue Editors


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Guest Editor
Department of Economics, University of Connecticut, Storrs, CT 06269, USA
Interests: panel econometrics; spatial econometrics; mathematical finance; economics; econometrics

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Guest Editor
Institute of Banking and Money, Nanjing Audit University, Nanjing 210017, China
Interests: econometrics; financial econometrics

Special Issue Information

Dear Colleagues,

The primary objective of this Special Issue is to showcase the latest developments in the field of financial econometrics and machine learning and provide a platform for researchers to share their insights, methodologies, and findings. We invite contributions that bridge the gap between econometric theory and machine learning applications, shedding light on the challenges, opportunities, and implications of this integration.

This Special Issue covers a wide range of pertinent topics that are suitable for exploration. These topics encompass, but are not limited to, asset pricing models incorporating machine learning techniques, portfolio optimization and asset allocation using advanced data analytics, volatility modeling and forecasting with machine learning algorithms, high-frequency trading and market microstructure analysis, risk management and credit scoring models utilizing machine learning, financial forecasting and macroeconomic modeling with machine learning, the interpretability and explainability of machine learning models in finance, model validation, and the robustness of machine learning applications in financial econometrics. Both theoretical and empirical contributions that provide novel insights, methodologies, and practical applications in this evolving field are also welcome. 

We look forward to receiving your submissions and to compiling an exceptional collection of articles that will advance our understanding of financial econometrics and machine learning. The ultimate aim is to explore the frontiers of this exciting field and uncover new avenues for knowledge and innovation.

Prof. Dr. Chihwa Kao
Dr. Zhonghui Zhang
Guest Editors

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Keywords

  • machine learning
  • financial econometrics
  • asset pricing models
  • portfolio optimization
  • volatility modeling
  • investment decision-making
  • derivatives
  • risk management
  • credit analysis
  • financial forecasting
  • model validation
  • robustness
  • random matrix theory

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Published Papers (2 papers)

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Research

14 pages, 982 KiB  
Article
Online Investor Sentiment via Machine Learning
by Zongwu Cai and Pixiong Chen
Mathematics 2024, 12(20), 3192; https://doi.org/10.3390/math12203192 - 12 Oct 2024
Viewed by 557
Abstract
In this paper, we propose utilizing machine learning methods to determine the expected aggregated stock market risk premium based on online investor sentiment and employing the multifold forward-validation method to select the relevant hyperparameters. Our empirical studies provide strong evidence that some machine [...] Read more.
In this paper, we propose utilizing machine learning methods to determine the expected aggregated stock market risk premium based on online investor sentiment and employing the multifold forward-validation method to select the relevant hyperparameters. Our empirical studies provide strong evidence that some machine learning methods, such as extreme gradient boosting or random forest, show significant predictive ability in terms of their out-of-sample performances with high-dimensional investor sentiment proxies. They also outperform the traditional linear models, which shows a possible unobserved nonlinear relationship between online investor sentiment and risk premium. Moreover, this predictability based on online investor sentiment has a better economic value, so it improves portfolio performance for investors who need to decide the optimal asset allocation in terms of the certainty equivalent return gain and the Sharpe ratio. Full article
(This article belongs to the Special Issue Financial Econometrics and Machine Learning)
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27 pages, 4774 KiB  
Article
A Functional Data Approach for Continuous-Time Analysis Subject to Modeling Discrepancy under Infill Asymptotics
by Tao Chen, Yixuan Li and Renfang Tian
Mathematics 2023, 11(20), 4386; https://doi.org/10.3390/math11204386 - 22 Oct 2023
Viewed by 1414
Abstract
Parametric continuous-time analysis often entails derivations of continuous-time models from predefined discrete formulations. However, undetermined convergence rates of frequency-dependent parameters can result in ill-defined continuous-time limits, leading to modeling discrepancy, which impairs the reliability of fitting and forecasting. To circumvent this issue, we [...] Read more.
Parametric continuous-time analysis often entails derivations of continuous-time models from predefined discrete formulations. However, undetermined convergence rates of frequency-dependent parameters can result in ill-defined continuous-time limits, leading to modeling discrepancy, which impairs the reliability of fitting and forecasting. To circumvent this issue, we propose a simple solution based on functional data analysis (FDA) and truncated Taylor series expansions. It is demonstrated through a simulation study that our proposed method is superior—compared with misspecified parametric methods—in fitting and forecasting continuous-time stochastic processes, while the parametric method slightly dominates under correct specification, with comparable forecast errors to the FDA-based method. Due to its generally consistent and more robust performance against possible misspecification, the proposed FDA-based method is recommended in the presence of modeling discrepancy. Further, we apply the proposed method to predict the future return of the S&P 500, utilizing observations extracted from a latent continuous-time process, and show the practical efficacy of our approach in accurately discerning the underlying dynamics. Full article
(This article belongs to the Special Issue Financial Econometrics and Machine Learning)
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