Reducing home equity bias through transparency

Reducing home equity bias through transparency Reducing home equity bias through transparency

July 31, 20181 min read
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One of the goals of global stock exchange mergers is to create a consolidated trading platform that makes listed firms available to a greater number of investors while providing firms with larger pools of liquidity. But the problem of equity home bias—the tendency of investors to overinvest in domestic securities and underinvest in foreign securities—can thwart optimal global portfolio diversification. In a recent study, Grace Pownall, professor of accounting; Maria Vulcheva 05MBA 11PhD (FIU); and Xue Wang (Ohio State) examine such home bias in Euronext, which was created in 2002 when four European countries merged their stock exchanges. The researchers focus in particular on two structural mechanisms adopted by Euronext: (1) the integration of trading platforms across the four exchanges, and (2) the creation of named segments open to firms that voluntarily pre commit to greater transparency in financial reporting and corporate governance. In their investigation of these mechanisms, the researchers find that firms that choose not to join the segmented list see no diminution of home bias, while the segmented, more transparent firms reap significant increases in all categories of foreign holdings relative to domestic holdings.


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  • Grace Pownall
    Grace Pownall Professor of Accounting; Area Coordinator of Accounting

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