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Do `speculative traders' increase Stock Price Volatility? Empirical evidence from the Bombay Stock Exchange

  • Venkat Eleswarapu
  • Chandrasekar Krishnamurti

In India there existed, until recently, a form of highly leveraged margin trading called the Badla system, for certain stocks categorized as group A stocks. In March of 1994, the Securities and Exchange Board of India (SEBI) has effectively banned the facility blaming it for causing "excessive speculation". We study the effect of badla trading on stock return volatility by comparing the daily data from 1992 for group A and a matched sample of group B stocks. After controlling for other factors such as trading frequency, the average price level and the market capitalization of the firms, we find that the residual variance is actually lower for the group A stocks. Also, variance ratio tests indicate, that after accounting for other factors, no differences in the magnitude of price reversals (serial correlation) for both groups of stocks. Hence, SEBI's decision does not seem justified on economic grounds.

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Paper provided by EconWPA in its series Finance with number 9507006.

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Length: 23 pages
Date of creation: 12 Jul 1995
Date of revision:
Handle: RePEc:wpa:wuwpfi:9507006
Note: Postscript and, pages: 23. Also available as:
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  1. Conrad, Jennifer, 1989. " The Price Effect of Option Introduction," Journal of Finance, American Finance Association, vol. 44(2), pages 487-98, June.
  2. Venkat Eleswarapu & Chandrasekar Krishnamurti, 1995. "Liquidity, stock returns and ownership structure: an empirical study of the BSE," Finance 9507005, EconWPA.
  3. Hardouvelis, Gikas A, 1990. "Margin Requirements, Volatility, and the Transitory Components of Stock Prices," American Economic Review, American Economic Association, vol. 80(4), pages 736-62, September.
  4. Hsieh, David A & Miller, Merton H, 1990. " Margin Regulation and Stock Market Volatility," Journal of Finance, American Finance Association, vol. 45(1), pages 3-29, March.
  5. Fama, Eugene F & French, Kenneth R, 1988. "Permanent and Temporary Components of Stock Prices," Journal of Political Economy, University of Chicago Press, vol. 96(2), pages 246-73, April.
  6. Detemple, Jerome & Jorion, Philippe, 1990. "Option listing and stock returns : An empirical analysis," Journal of Banking & Finance, Elsevier, vol. 14(4), pages 781-801, October.
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