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Bond Rout Spurs Record Outflow From $3.6 Billion Schwab Muni ETF

Sep 17, 2026 6:24 PM · YahooFinance

(Bloomberg) -- A roughly $3.6 billion municipal-bond exchange-traded fund is careening toward its biggest monthly outflow ever, after a fixed-income selloff pushed muni yields to the highest in months.

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A recent wave of outflows in the Schwab Municipal Bond ETF, including a record $360 million single-day withdrawal last week, has put the fund on track for its worst month since its 2022 launch. Investors have pulled more than $530 million so far in September.

Schwab holds just over half the ETF's outstanding shares, according to Bloomberg-compiled data. The size of the move suggests to some market watchers that the outflows were caused by model-portfolio reshuffling.

"This looks like the call is coming from inside the house," said Eric Balchunas, a Bloomberg Intelligence ETF analyst. "Schwab famously owns their own funds and when you see a trade this big, they're really the only people who could have pulled it off."

In model portfolio investing, money managers like Schwab or BlackRock Inc. bundle funds into ready-made strategies for financial advisers to offer to clients. Portfolio rebalancing is often suspected to be behind many sudden large ETF flows.

"The recent back up in tax-exempt yields has been in line with the broader market, and it has generally created opportunities for many tax-sensitive investors and model providers to reposition their portfolios," said Jason Diefenthaler, head of active taxable and municipal strategies at Schwab Asset Management.

Concerns over inflation, rising Treasury rates and heavy new issuance have put pressure on the muni market. Muni yields surged last week amid a rout in Treasuries, with the longest-dated securities reaching their highest levels since 2011.

Last week, ten-year benchmark muni yields climbed to their highest since April 2025, when volatility from President Donald Trump's tariff policies roiled the market. Meanwhile, stocks are heading for a second-consecutive weekly loss.

"We've seen some weakness in the equity markets so I suspect there is asset rebalancing going on in the other direction," said Patrick Luby, head of municipal research and senior municipal strategist at CreditSights Inc. "Taking some out of fixed income and moving it into equity."

With assistance from Amanda Albright and Vildana Hajric.