Active bond mutual funds recorded $6.48 billion in outflows in the week ended September 16, reversing a $664 million inflow the previous week and marking their first weekly outflow after several weeks of gains. Taxable bond funds accounted for $4.2 billion of withdrawals, while municipal bond funds lost $2.28 billion. Bond ETFs continued to attract money, with the Investment Company Institute reporting $9.72 billion in net issuance for the week ended September 16, ETF.com recording $10.3 billion in U.S. fixed-income ETF inflows through September 18, and Bloomberg Intelligence analyst Eric Balchunas estimating roughly $12 billion. Investors also favored shorter duration, with short-term U.S. Treasury ETFs attracting $12.2 billion over the 20 trading sessions through September 8, compared with $2.5 billion for long-term bond ETFs. The divergence does not necessarily indicate that investors are abandoning bonds, but it shows a shift in both investment vehicle and interest-rate exposure. Sustained mutual fund redemptions could force portfolio managers to sell bonds, potentially pressuring prices and net asset values and prompting further withdrawals, while ETF trading can allow investors to exchange shares without each transaction requiring the fund to sell underlying bonds.