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Causality Analysis of COVID-19 Induced Crashes in Stock and Commodity Markets: A Topological Perspective

Author

Listed:
  • Buddha Nath Sharma

    (National Institute of Technology Sikkim, India)

  • Anish Rai

    (National Institute of Technology Sikkim, India)

  • SR Luwang

    (National Institute of Technology Sikkim, India)

  • Md. Nurujjaman

    (National Institute of Technology Sikkim, India)

  • Sushovan Majhi

    (Data Science Program, George Washington University, Washington, DC, USA)

Abstract

The paper presents a comprehensive causality analysis of the US stock and commodity markets during the COVID-19 crash. The dynamics of different sectors are also compared. We use Topological Data Analysis (TDA) on multidimensional time-series to identify crashes in stock and commodity markets. The Wasserstein Distance WD shows distinct spikes signaling the crash for both stock and commodity markets. We then compare the persistence diagrams of stock and commodity markets using the WD metric. A significant spike in the $WD$ between stock and commodity markets is observed during the crisis, suggesting significant topological differences between the markets. Similar spikes are observed between the sectors of the US market as well. Spikes obtained may be due to either a difference in the magnitude of crashes in the two markets (or sectors), or from the temporal lag between the two markets suggesting information flow. We study the Granger-causality between stock and commodity markets and also between different sectors. The results show a bidirectional Granger-causality between commodity and stock during the crash period, demonstrating the greater interdependence of financial markets during the crash. However, the overall analysis shows that the causal direction is from stock to commodity. A pairwise Granger-causal analysis between US sectors is also conducted. There is a significant increase in the interdependence between the sectors during the crash period. TDA combined with Granger-causality effectively analyzes the interdependence and sensitivity of different markets and sectors.

Suggested Citation

  • Buddha Nath Sharma & Anish Rai & SR Luwang & Md. Nurujjaman & Sushovan Majhi, 2025. "Causality Analysis of COVID-19 Induced Crashes in Stock and Commodity Markets: A Topological Perspective," Papers 2502.14431, arXiv.org.
    • Handle: RePEc:arx:papers:2502.14431
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    References listed on IDEAS

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