The Lost Capital Asset Pricing Model

Andrei, Daniel, Cujean, Julien and Wilson, Mungo (2018) The Lost Capital Asset Pricing Model. UNSPECIFIED.


A flat Securities Market Line is not evidence against the CAPM. In a rational-expectations economy in which markets are not informationally efficient, the CAPM holds but is rejected empirically (Type I Error). There exists an information gap between the empiricist and the average investor who clears the market. The CAPM holds unconditionally for the investor, but appears flat to the empiricist who uses the correct unconditional market proxy. This distortion is empirically substantial and offers a new interpretation of why “Betting Against Beta” works: BAB really bets on true beta. The empiricist retrieves a stronger CAPM on macroeconomic announcement days.

Item Type: Other Working Paper
Keywords: finance
Subject(s): Finance
Date Deposited: 02 Mar 2017 09:51
Last Modified: 10 Dec 2018 12:11
Funders: not applicable

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