IMF Note-Fund Investor Types and Bond Market Volatility

March 12, 2025-Summary
This note explores the connection between the varied investor profiles of exchange-traded funds (ETFs) and open-ended mutual funds (OEMFs) and the return volatility of the securities they hold. Based on the security-level data of US ETF and OEMF holdings, the analysis suggests that, on aggregate, a higher ETF ownership share may be associated with lower bond return volatility.

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However, there is a stark divergence between the behavior of institutional and retail ETF investors and their impact on the underlying market. When a larger share of a bond is owned by institutional investors through ETFs, its volatility tends to be higher. Conversely, retail investors tend to offset this impact of institutional investors. This disparity is not evident for OEMFs.

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Source: imf.org