Citigroup has significantly upgraded its outlook for the U.S. exchange-traded fund (ETF) industry, projecting assets under management to surpass $25 trillion by 2030 and reach $42 trillion by 2035. This represents a sharp increase from Citi's earlier estimates of $19 trillion and $29 trillion for those respective milestones. As of March 2025, U.S.-listed ETF assets stood at approximately $10.4 trillion, indicating that the industry could more than double its size by the end of the decade according to the Wall Street firm's base case. Drew Pettit, US equity and ETF strategist at Citigroup, emphasized that active ETFs are a primary driver of this growth, with their share of total ETF assets expected to more than double from 10% to 21% over the next ten years as these products capture greater inflows. The surge in active ETFs is attributed to investor preferences for flexible strategies and comparatively lower costs compared to traditional mutual funds or passive index trackers. Citi's report highlights specific opportunities within niche strategy ETFs, core bond and equity portfolios, and specialized themes such as dividend investing. Pettit noted that while the projections are more bullish than previous forecasts, the industry is entering a mature growth phase where organic flows and market performance will play a more balanced role compared to prior decades. Active ETFs seek to beat benchmarks or achieve specific outcomes rather than simply tracking indices, and they have drawn significant investor interest for their potential to offer distinct investment profiles. Institutional sentiment aligns with Citi's bullish outlook, as evidenced by a PwC report based on a survey of 72 executives. More than one-third of U.S. respondents in that survey expect U.S. ETF assets to more than double and reach $25 trillion or more by June 2030. Globally, 60% of surveyed executives anticipate active ETF assets under management will more than double to at least $4 trillion by June 2030, rising from $1.7 trillion at the end of 2025. Additionally, a separate report by Brown Brothers Harriman suggests even higher hopes for the sector by 2033, forecasting active ETF assets could grow to $10 trillion. Beyond active funds, the defined outcome ETF segment is generating its own growth narrative with strong projections from Cerulli Associates in partnership with Innovator. These products, which utilize options strategies to provide downside buffers in exchange for capped upside, are expected to quadruple in assets to more than $334 billion by 2030. This segment would grow at a compound annual rate between 29% and 35%, far outpacing the broader ETF industry's expected growth rate of approximately 15% over the same period. Research indicates that clients increasingly seek the certainty of traditional risk mitigation strategies without falling short on diversification and stability, driving demand for these instruments. The broader ETF market also benefits from product innovation, streamlined launch regulations, adoption of sophisticated strategies, and growing demand for tax-efficient investment vehicles, with U.S. equity-focused ETFs alone attracting over $75.8 billion in inflows through 2026 after more than $1.1 trillion in flows over the previous two years.