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Non-linear Speculative Bubbles in the Pakistani Stock Market

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  • Ehsan Ahmed

    (James Madison University, Harrisonburg, VA, USA.)

  • J. Barkley Rosser, Jr.

    (James Madison University, Harrisonburg, VA, USA.)

Abstract

Since 1987 many stock markets of the world have experienced volatility. This has been true of many emerging stock markets. Our study of daily stock market data from Pakistan between June 1987 and May 1993 finds the results to be consistent with the impression of great volatility and unpredictability thought to be common in such emerging markets. We used the VAR technique to estimate a "presumed" fundamental on stock indices using lagged first differences of natural logs of daily exchange rates and stock indices. We used the Hamilton switching model and associated Walk test to see if such speculative trends were present. We were significantly unable to rule them out. We then tested for ARCH effects, whose presence we failed to reject. We then used ARCHgenerated residuals to apply the BDS test of general non-linear structure. We failed to reject the lack of such non-linear structure quite significantly. Thus, the Pakistani stock market during the period of study seems to have exhibited quite complex dynamics, along with apparently strong trends that may indicate the presence of speculative bubbles. This has many important implications for Pakistani as well as other emerging markets.

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Bibliographic Info

Article provided by Pakistan Institute of Development Economics in its journal The Pakistan Development Review.

Volume (Year): 34 (1995)
Issue (Month): 1 ()
Pages: 25-41

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Handle: RePEc:pid:journl:v:34:y:1995:i:1:p:25-41

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Cited by:
  1. Fazal Husain, 1997. "The Random Walk Model in the Pakistani Equity Market: An Examination," The Pakistan Development Review, Pakistan Institute of Development Economics, vol. 36(3), pages 221-240.
  2. Husain, Fazal & UPPAL, Jamshed, 1999. "Stock Returns Volatility in an Emerging Market: The Pakistani Evidence," MPRA Paper 5270, University Library of Munich, Germany.
  3. Iqbal, Javed & Haider, Aziz, 2005. "Arbitrage pricing theory: evidence from an emerging stock market," MPRA Paper 8699, University Library of Munich, Germany.
  4. Attiya Y. Javed & Ayaz Ahmed, 1999. "The Response of Karachi Stock Exchange to Nuclear Detonation," The Pakistan Development Review, Pakistan Institute of Development Economics, vol. 38(4), pages 777-786.
  5. Salman Syed Ali & Khalid Mustafa, 2001. "Testing Semi-strong Form Efficiency of Stock Market," The Pakistan Development Review, Pakistan Institute of Development Economics, vol. 40(4), pages 651-674.

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