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Stock Price Dynamics In Overlapped Market Segments: Intra And Inter‐Industry Contagion Effects

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  • Kasim Alli
  • Samantha Thapa
  • Kenneth Yung

Abstract

This study examines stock price dynamics of contagion effects in overlapping markets using an exponential ARCH (Autoregressive Conditional Hetero‐scedastic) model. Specifically, the stock price dynamics among the oil and oil‐related industries of the US are examined to see how stock price movements in one industry affect those of the related industries. The results suggest that when the amount of price innovations is larger than the expected amount, volatility of stock returns will be affected. The results further show that this influence comes from the oil‐service industry and spreads to the oil industry and the gas industry. That is, inter‐industry contagion effects do exist. In addition, when the firms of the oil industry are grouped into three size categories ‐ large, medium and small ‐ the results indicate that the source of contagion is from the large and the small oil firms. The influence of their price innovations spread to medium‐sized oil firms, the oil‐service industry and the gas industry. That is, the inter‐industry and intra‐industry contagion effects exist simultaneously.

Suggested Citation

  • Kasim Alli & Samantha Thapa & Kenneth Yung, 1994. "Stock Price Dynamics In Overlapped Market Segments: Intra And Inter‐Industry Contagion Effects," Journal of Business Finance & Accounting, Wiley Blackwell, vol. 21(7), pages 1059-1070, October.
    • Handle: RePEc:bla:jbfnac:v:21:y:1994:i:7:p:1059-1070
    DOI: 10.1111/j.1468-5957.1994.tb00364.x
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