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Tests of Asset Pricing with Time‐Varying Expected Risk Premiums and Market Betas

Tests of Asset Pricing with Time‐Varying Expected Risk Premiums and Market Betas ABSTRACT Tests of asset‐pricing models are developed that allow expected risk premiums and market betas to vary over time. These tests exploit the relation between expected excess returns and current market values. Using weekly data for 1963 through 1982 on ten common stock portfolios formed according to equity capitalization, a single‐risk‐premium model is not rejected if the expected premium is time varying and is not constrained to correspond to a market factor. Conditional mean‐variance efficiency of a value‐weighted stock index is rejected, and the rejection is insensitive to how much variability of expected risk premiums is assumed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Journal of Finance Wiley

Tests of Asset Pricing with Time‐Varying Expected Risk Premiums and Market Betas

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References (40)

Publisher
Wiley
Copyright
1987 The American Finance Association
ISSN
0022-1082
eISSN
1540-6261
DOI
10.1111/j.1540-6261.1987.tb02564.x
Publisher site
See Article on Publisher Site

Abstract

ABSTRACT Tests of asset‐pricing models are developed that allow expected risk premiums and market betas to vary over time. These tests exploit the relation between expected excess returns and current market values. Using weekly data for 1963 through 1982 on ten common stock portfolios formed according to equity capitalization, a single‐risk‐premium model is not rejected if the expected premium is time varying and is not constrained to correspond to a market factor. Conditional mean‐variance efficiency of a value‐weighted stock index is rejected, and the rejection is insensitive to how much variability of expected risk premiums is assumed.

Journal

The Journal of FinanceWiley

Published: Jun 1, 1987

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