Identification of insider trading using extreme gradient boosting and multi-objective optimization

Shangkun Deng, Chenguang Wang, Jie Li, Haoran Yu, Hongyu Tian, Yu Zhang, Yong Cui, Fangjie Ma, Tianxiang Yang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Illegal insider trading identification presents a challenging task that attracts great interest from researchers due to the serious harm of insider trading activities to the investors' confidence and the sustainable development of security markets. In this study, we proposed an identification approach which integrates XGboost (eXtreme Gradient Boosting) and NSGA-II (Non-dominated Sorting Genetic Algorithm II) for insider trading regulation. First, the insider trading cases that occurred in the Chinese security market were automatically derived, and their relevant indicators were calculated and obtained. Then, the proposed method trained the XGboost model and it employed the NSGA-II for optimizing the parameters of XGboost by using multiple objective functions. Finally, the testing samples were identified using the XGboost with optimized parameters. Its performances were empirically measured by both identification accuracy and eciency over multiple time window lengths. Results of experiments showed that the proposed approach successfully achieved the best accuracy under the time window length of 90-days, demonstrating that relevant features calculated within the 90-days time window length could be extremely beneficial for insider trading regulation. Additionally, the proposed approach outperformed all benchmark methods in terms of both identification accuracy and eciency, indicating that it could be used as an alternative approach for insider trading regulation in the Chinese security market. The proposed approach and results in this research is of great significance for market regulators to improve their supervision eciency and accuracy on illegal insider trading identification.

Original languageEnglish
Article number367
JournalInformation (Switzerland)
Volume10
Issue number12
DOIs
Publication statusPublished - 2019 Dec 1

Keywords

  • Identification
  • Insider trading
  • Multi-objective optimization
  • Security market
  • Sustainable development
  • XGboost

ASJC Scopus subject areas

  • Information Systems

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