Rational Speculative Bubbles: An Empirical Investigation of the London Stock Exchange

Chris Brooks and Apostolos Katsaris

Bulletin of Economic Research, 2003, vol. 55, issue 4, 319-346

Abstract: In recent years, a sharp divergence of London Stock Exchange equity prices from dividends has been noted. In this paper, we examine whether this divergence can be explained by reference to the existence of a speculative bubble. Three different empirical methodologies are used: variance bounds tests, bubble specification tests, and cointegration tests based on both ex post and ex ante data. We find that, stock prices diverged significantly from their fundamental values during the late 1990's, and that this divergence has all the characteristics of a bubble.

Date: 2003
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