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ETF Prime: Tax Strategy Behind 351 Exchange ETFs Draws Scrutiny

A Treasury Department warning on the tax strategy behind 351 exchange ETFs led this week’s ETF Prime. Host Nate Geraci and Cinthia Murphy, director of research at TMX VettaFi, previewed the top storylines for the fourth quarter. Jeff Klingelhofer, managing director and portfolio manager at Aristotle Pacific, joined later.Key Takeaways: The Treasury Department’s 351 exchange warning isn’t enforcement, but Murphy expects activity to slow. ETF inflows are nearing $1.6 trillion for 2026, already topping last year’s record of nearly $1.5 trillion. Aristotle Pacific’s three active bond ETFs hold nearly $150 million after launching in late July. Section 351 of the tax code lets investors swap stock for ETF shares without paying capital gains taxes right away. Murphy called the Treasury Department’s recent guidance on the practice a warning rather than enforcement, but a red flag. She cited Bloomberg data showing about $22 billion in ETFs have used 351 exchanges. Murphy said the concern is abuse, not normal use. Her examples include investors who contribute stock and quickly redeem, or an ETF that overnight becomes a completely different fund. Murphy and Geraci both expect 351 activity to slow while issuers consult tax and legal counsel. Murphy was also skeptical of new filings for ETFs that would let investors bet on team performance through sports futures. She called the funds “a solution looking for a problem” because they fill no portfolio need. Amplify’s pending professional sports ETF, which holds public and private companies, offers a more direct route, she noted.Texas Exchange & Record ETF InflowsMurphy welcomed the new Texas Stock Exchange, calling it “a very cool deal” for ETF issuers. Funds can already trade anywhere, but issuers now have another primary listing venue to choose from. More competition should improve market maker incentives, trading efficiency, and pricing, which she said benefits investors. On flows, Murphy and Geraci noted that 2026 ETF inflows are nearing $1.6 trillion, topping last year’s record. Murphy calculated that flows average $5.5 billion to $5.6 billion per day, which would put the year at $2.05 trillion. See more: Baron Crosses $1 Billion ETF Mark in Under a Year Klingelhofer discussed Aristotle Pacific’s three active fixed income ETFs, which launched in late July and hold nearly $150 million. They are the Aristotle Core Plus Income ETF (ARCP), the Aristotle Multi-Sector Income ETF (ARMS), and the Aristotle Short Term Income ETF (SDUR). He argued that bond benchmarks like the Bloomberg U.S. Aggregate Bond Index ignore about half of the market’s opportunities. Those include off-balance-sheet AI data center financings. Yields have also returned, with core plus strategies in the mid-6% range and multisector near 7%.For more ETF Prime podcast episodes, visit our ETF Prime Channel.

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