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On The Possibility of Price Decreasing Bubbles

  • Philippe Weil

It is often argued that a rational bubble, because it is positive, must increase the price of a stock. This argument is not valid in general: as soon as bubbles affect interest rates, the fundamental value of a stock depends on whether or not a bubble is present. The existence of a rational bubble then might, by raising equilibrium interest rates, depress the fundamental to such an extent that the sum of the positive bubble and decreased fundamental falls short of the fundamental, no-bubble price. Under conditions made precise below, there can therefore be price decreasing bubbles, and an asset can be "undervalued."

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File URL: http://www.nber.org/papers/w2821.pdf
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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 2821.

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Date of creation: Jan 1989
Date of revision:
Publication status: published as Econometrica, Vol. 58, no. 6 (1990): 1467-1474.
Handle: RePEc:nbr:nberwo:2821
Note: ME
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  1. Obstfeld, Maurice & Rogoff, Kenneth S., 1983. "Speculative Hyperinflations in Maximizing Models: Can We Rule Them Out?," Scholarly Articles 12491027, Harvard University Department of Economics.
  2. Diba, Behzad T & Grossman, Herschel I, 1987. "On the Inception of Rational Bubbles," The Quarterly Journal of Economics, MIT Press, vol. 102(3), pages 697-700, August.
  3. Bernheim, B Douglas & Bagwell, Kyle, 1988. "Is Everything Neutral?," Journal of Political Economy, University of Chicago Press, vol. 96(2), pages 308-38, April.
  4. West, Kenneth D, 1988. " Bubbles, Fads and Stock Price Volatility Tests: A Partial Evaluation," Journal of Finance, American Finance Association, vol. 43(3), pages 639-56, July.
  5. Grandmont, Jean-Michel, 1985. "On Endogenous Competitive Business Cycles," Econometrica, Econometric Society, vol. 53(5), pages 995-1045, September.
  6. Weil, Philippe, 1989. "Overlapping families of infinitely-lived agents," Journal of Public Economics, Elsevier, vol. 38(2), pages 183-198, March.
  7. Gale, David, 1973. "Pure exchange equilibrium of dynamic economic models," Journal of Economic Theory, Elsevier, vol. 6(1), pages 12-36, February.
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