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Demand Curves for Stocks Do Slope Down: New Evidence From An Index Weights Adjustment

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  • Aditya Kaul
  • Vikas Mehrotra
  • Randall Morck

Abstract

Weights in the Toronto Stock Exchange 300 index are determined by the market values of the included stocks' public floats. In November 1996, the exchange implemented a previously announced revision of its definition of the public float. This revision, which increased the floats and the index weights of 31 stocks, conveyed no information and had no effect on the legal duties of shareholders. Affected stocks experienced statistically significant excess returns of 2.3 percent during the event week, and no price reversal occurred as trading volume returned to normal levels. These findings support downward sloping demand curves for stocks.

Suggested Citation

  • Aditya Kaul & Vikas Mehrotra & Randall Morck, 1999. "Demand Curves for Stocks Do Slope Down: New Evidence From An Index Weights Adjustment," Harvard Institute of Economic Research Working Papers 1884, Harvard - Institute of Economic Research.
  • Handle: RePEc:fth:harver:1884
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    References listed on IDEAS

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    1. Scholes, Myron S, 1972. "The Market for Securities: Substitution versus Price Pressure and the Effects of Information on Share Prices," The Journal of Business, University of Chicago Press, vol. 45(2), pages 179-211, April.
    2. Lynch, Anthony W & Mendenhall, Richard R, 1997. "New Evidence on Stock Price Effects Associated with Changes in the S&P 500 Index," The Journal of Business, University of Chicago Press, vol. 70(3), pages 351-383, July.
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