Feb 10, 2010
Q & A
In their book Valuing Wall Street published in early 2000, Andrew Smithers and Stephen Wright claim that the q ratio popularized by Nobel laureate James Tobin reliably identifies periods of extreme overvaluation and undervaluation in stock prices. Can investors use this indicator to implement a successful market timing strategy?
EFF/KRF: This proposition has been tested in several papers, and the answer is no. The market-to-book ratio for the market (a proxy for q) shows some ability to predict stock returns during the 1930s, but not thereafter.
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ABOUT FAMA AND FRENCH
Eugene F. Fama
The Robert R.
McCormick Distinguished
Service Professor of
Finance at the University
of Chicago Booth School
of Business
Kenneth R. French
The Carl E. and Catherine
M. Heidt Professor of
Finance at the Tuck
School of Business at
Dartmouth College
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Dimensional Fund Advisors Ltd. is authorised and regulated in the United Kingdom by the Financial Services Authority (FRN: 150100), is registered in England and Wales under Company No. 02569601 and VAT No. 577327607. The registered office address of Dimensional Fund Advisors Ltd. is 7 Down Street, London, W1J 7AJ, United Kingdom. Dimensional Fund Advisors Ltd. is a subsidiary of Dimensional Fund Advisors.