Vanguard filed with the Securities and Exchange Commission to remove the name VIPER from its 24 exchange-traded funds, effective Thursday, The Wall Street Journal reports.

As the acronym stands for Vanguard Index Participation Equity Receipts, Daniel Wiener, editor of the Independent Adviser for Vanguard Investors newsletter, surmises it could be a sign that the company is planning to offer bond ETFs, as VIPERs refer to equity receipts. It "would have been a bit of a misnomer," Wiener said.

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