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Dynamic topology and allometric scaling behavior on the Vietnamese stock market

Author

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  • Nguyen, Q.
  • Nguyen, N.K. K.
  • Nguyen, L.H. N.

Abstract

The impact of the Vietnamese financial crisis during 2011–2012 into the stock market was revealed by a structural change of the minimum spanning tree (MST) constructed from the daily stock price. We found that the MST has a star-like structure during this period, similar to that of the German market during the worldwide financial crisis of 2007–2008 (M. Wiliski et al., 2013), and a hierarchical scale-free structure for the rest of time. In addition, we investigate the market from a complex network perspective by analyzing the allometric scaling behavior. We found that all networks have the allometric scaling property, with exponent η ranging from 1.213±0.013 during the financial instability period to about 1.357±0.011 in normal time. These values correspond to a complex “dimension” of the financial market of between 3 and 5, which need to be further investigated in the future.

Suggested Citation

  • Nguyen, Q. & Nguyen, N.K. K. & Nguyen, L.H. N., 2019. "Dynamic topology and allometric scaling behavior on the Vietnamese stock market," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 514(C), pages 235-243.
    • Handle: RePEc:eee:phsmap:v:514:y:2019:i:c:p:235-243
    DOI: 10.1016/j.physa.2018.09.061
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