The ETF industry is only gaining momentum, with over 5,400 ETFs trading and $1 trillion in flows notched at nearly the halfway point of 2026. Tune into the conversation with this week’s Zoo crew that covers thematic and leveraged ETF flows, SpaceX ETF controversies, and more. Host Dave Nadig, President & Director of Research at ETF.com is joined this week by freelancer Lara Crigger; Mike Akins, founding partner of ETF Action; and Todd Sohn, Senior ETF & Technical Strategist at Strategas Securities.
Highlights From This Episode
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ETF Flows Hit Historic Milestone The ETF industry crossed $1 trillion in net inflows before the halfway point of the year, a pace that stunned even the most seasoned veterans on this week’s ETF Zoo. While eye-catching money has flooded into leveraged, inverse, and options-income products, the bulk of assets continue flowing into low-cost, broad-market index funds. Vanguard has claimed the top spot in the ETF league table for the first time, while firms like Schwab, Fidelity, and a new wave of active managers are reshaping the competitive landscape below them.
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The SpaceX ETF Controversy Raises Red Flags Defiance quietly amended the prospectus for its fund SPCL just two days before the SpaceX IPO, pivoting the fund’s entire investment strategy from a broad space-themed basket to a single-stock focus — without any obligation to notify shareholders. The fund traded for roughly two hours before being halted, pulling in strong inflows during that window as retail investors scrambled to find a way to access SpaceX stock on its first day of trading.
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Thematic ETFs Are Promising More Than They Deliver The thematic ETF space is approaching 400 funds and $300 billion in assets, yet over 60% of those funds carry a Sharpe ratio below 1.0, meaning most are delivering poor risk-adjusted returns. The category is further muddied by inconsistent construction, with funds sharing the same “AI” or technology label holding wildly different underlying stocks, leaving advisors and investors struggling to compare or deploy them effectively.
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AI and Structural Shifts Are Accelerating an Already Crowded Market Issuers are increasingly turning to AI to draft ETF prospectuses, slashing filing costs by as much as 80% and raising real questions about the depth of review going into each new product. With 5,400 ETFs already on the market and filings accelerating, the Zoo crew warned that market makers may eventually struggle to provide adequate liquidity across such a sprawling product landscape. Broader structural questions around share class conversions, leveraged product proliferation, and the limits of the ETF wrapper itself are all converging at once, suggesting the industry’s next chapter may be defined as much by growing pains as by growth.
Find out more about this week’s guests:
Lara Crigger: Freelance contributor at ETF.com, and follow Lara on LinkedIn
Mike Akins: ETF Action and follow Mike on LinkedIn