(Bloomberg) -- Vanguard Group Inc. plans to offer its first exchange-traded fund focused on the $3.6 trillion U.S. municipal-bond market.

Valley Forge, Pennsylvania-based Vanguard, which oversees about $140 billion in municipal debt, filed a registration statement with the U.S. Securities and Exchange Commission for the tax-exempt index fund, according to a news release. The company expects the fund to be available by the end of June.

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