The Stock Market, Profit and Investment

Olivier Blanchard, Changyong Rhee and Lawrence Summers

No 3370, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: Should managers, when making investment decisions, follow the signals given by the stock market even if those do not coincide with their own assessments of fundamental value? This paper reviews the theoretical arguments and examines the empirical evidence, constructing and using a new US time series of data on the q ratio from 1900 to 1988. We decompose q - - the ratio of the market value of corporate capital to its replacement cost - - into the product of two terms, reflecting "fundamentals" and "valuation", the ratio of market value to fundamentals. We then examine the relation of investment to each of the two, using a number of alternative proxies for fundamentals. We interpret our results as pointing, strongly but not overwhelmingly, to a larger role of "fundamentals" than of "valuation" in investment decisions.

Date: 1990-05
Note: ME
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Citations: View citations in EconPapers (23)

Published as Quarterly Journal of Economics, Vol. 108, no. 1 (February 1993): 115-136.

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Related works:
Journal Article: The Stock Market, Profit, and Investment (1993)
Working Paper: THE STOCK MARKET, PROFIT AND INVESTMENT (1990)
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