Initial Margin Requirements, Volatility, and the Individual Investor: Insights from Japan

Kenneth Kim and Henry R. Oppenheimer

The Financial Review, 2002, vol. 37, issue 1, 1-15

Abstract: Initial margin requirements represent: (1) a cost impediment to the wealth constrained investor and (2) a potential way of mitigating excessive volatility. However, prior empirical research finds that margins are not an effective tool in reducing volatility. We consider the possibility that margins primarily affect certain stocks and investors. Specifically, we test whether margins affect individuals who, as a group, we believe to be the investors most affected when margin requirements change. Our initial empirical tests, however, do not support this contention.

Date: 2002
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