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Comments: Capital Asset Pricing in a General Equilibrium Framework

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  • Ross, Stephen A.

Abstract

This paper is a pioneering effort in the examination of the workings of rationality and efficiency in capital markets. The central theme of the paper is the notion of informational efficiency in markets for durable assets. In its broadest terms this imposes a behavioral constraint on the intertemporal development of the asset markets; in a perfect market the development of the equilibrium over time must not be self-contradictory. Individual agents' anticipations of future developments determine their current actions and these, in turn, determine equilibrium prices. But, tomorrow the process will be repeated and it is at this second step that the possibility of conflict enters. The future development need not fulfill precisely people's previous anticipations, but in a perfectly functioning market it would be difficult to accept a blatant contradiction. To believe that prices are lognormally distributed, for example, and to have that belief generate the same equilibrium price period after period is such a contradiction.

Suggested Citation

  • Ross, Stephen A., 1978. "Comments: Capital Asset Pricing in a General Equilibrium Framework," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 13(4), pages 625-626, November.
    • Handle: RePEc:cup:jfinqa:v:13:y:1978:i:04:p:625-626_00
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