{"url":"https://etfiq.com/research/library/state-street-why-etf-growth-is-booming/","section":"research","title":"Why ETF growth is booming | ETFIQ","description":"State Street Investment Management's July 2026 explainer, citing Morningstar, counts more than 14,000 ETFs worldwide holding $18.49 trillion.","as_of":"Oct 21, 2026","structured_data":[{"@type":"Report","name":"Summary: Why ETF growth is booming","headline":"Why ETF growth is booming","url":"https://etfiq.com/research/library/state-street-why-etf-growth-is-booming/","datePublished":"2026-10-21","dateModified":"2026-10-21","author":{"@id":"https://etfiq.com/#org"},"publisher":{"@id":"https://etfiq.com/#org"},"about":"Fund flows","abstract":"State Street Investment Management's July 2026 explainer, citing Morningstar, counts more than 14,000 ETFs worldwide holding $18.49 trillion.","isBasedOn":"https://www.ssga.com/us/en/individual/insights/why-etf-growth-is-booming","citation":{"@type":"Report","name":"Why ETF growth is booming","url":"https://www.ssga.com/us/en/individual/insights/why-etf-growth-is-booming","datePublished":"2026-07-16","publisher":{"@type":"Organization","name":"State Street Investment Management","url":"https://www.ssga.com/"},"author":{"@type":"Organization","name":"State Street Investment Management"}},"inLanguage":"en"},{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What does the State Street Investment Management paper conclude?","acceptedAnswer":{"@type":"Answer","text":"State Street Investment Management's July 2026 explainer, citing Morningstar, counts more than 14,000 ETFs worldwide holding $18.49 trillion. The paper\u2019s own words are at the link above."}},{"@type":"Question","name":"What does ETFIQ\u2019s data show on the same question?","acceptedAnswer":{"@type":"Answer","text":"From Sep 21, 2026 to Oct 20, 2026, the ETFs ETFIQ can count had a net flow of +$127.9bn, with +$90.1bn for stock ETFs and +$35.7bn for bond ETFs. ETFIQ states both figures and does not reconcile them."}},{"@type":"Question","name":"What is an ETF\u2019s net flow?","acceptedAnswer":{"@type":"Answer","text":"The change in its shares outstanding times its net asset value, summed over the days of a window: money in less money out."}},{"@type":"Question","name":"Where can I read \u201cWhy ETF growth is booming\u201d?","acceptedAnswer":{"@type":"Answer","text":"On State Street Investment Management\u2019s own site. ETFIQ summarizes the paper and does not host it."}}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"ETFIQ","item":"https://etfiq.com/"},{"@type":"ListItem","position":2,"name":"Research","item":"https://etfiq.com/research/"},{"@type":"ListItem","position":3,"name":"Library","item":"https://etfiq.com/research/library/"},{"@type":"ListItem","position":4,"name":"State Street Investment Management","item":"https://etfiq.com/research/library/state-street/"},{"@type":"ListItem","position":5,"name":"Why ETF growth is booming","item":"https://etfiq.com/research/library/state-street-why-etf-growth-is-booming/"}]},{"@type":"WebPage","name":"Why ETF growth is booming","description":"State Street Investment Management's July 2026 explainer, citing Morningstar, counts more than 14,000 ETFs worldwide holding $18.49 trillion.","url":"https://etfiq.com/research/library/state-street-why-etf-growth-is-booming/","dateModified":"2026-10-21","isPartOf":{"@type":"WebSite","name":"ETFIQ","url":"https://etfiq.com"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".lede",".faq"]},"publisher":{"@id":"https://etfiq.com/#org"}}],"characters":4895,"truncated":false,"content":"ETFIQ / Research / Library / State Street Investment Management / Why ETF growth is booming \n \n Published Jul 16, 2026 by State Street Investment Management. Summary by ETFIQ as of Oct 21, 2026.\n Why ETF growth is booming\n State Street Investment Management's July 2026 explainer, citing Morningstar, counts more than 14,000 ETFs worldwide holding $18.49 trillion. \n State Street Investment Management \u00b7 Issuer \u00b7 Read the full paper at State Street Investment Management \u2197 \n What it says\n Figures as stated by State Street Investment Management, Jul 16, 2026\n State Street Investment Management, citing Morningstar, says ETFs drew a record $2 trillion of global inflows in 2025. (State Street)\n State Street Investment Management, citing Morningstar, reports $641 billion of ETF inflows in the first quarter of 2026, despite high volatility and geopolitical uncertainty. (State Street)\n State Street Investment Management puts median expense ratios at 0.58% for US-listed ETFs and 0.90% for US-listed mutual funds, citing Morningstar data as of March 31, 2026. (State Street)\n State Street Investment Management, citing Morningstar, says total ETF assets have grown 19% a year on average since 2008. (State Street)\n State Street Investment Management says its new 2035 forecast runs nearly 18% ahead of the 10-year projection it made a year earlier. (State Street)\n The ETFIQ take\n ETFIQ data to Oct 20, 2026 \u00b7 the 746 of 4,807 ETFs ETFIQ covers with a daily figure, Sep 21, 2026 to Oct 20, 2026\n State Street Investment Management reports Morningstar's count of more than 14,000 ETFs worldwide holding $18.49 trillion as of March 31, 2026. From Sep 21, 2026 to Oct 20, 2026, the ETFs ETFIQ can count had a net flow of +$127.9bn, with +$90.1bn for stock ETFs and +$35.7bn for bond ETFs.\n +$127.9bn net flow, Sep 21, 2026 to Oct 20, 2026, summed over the 746 of 4,807 ETFs ETFIQ covers with a daily figure , Oct 20, 2026. ETFIQ \n +$461.8bn net flow, Jan 2, 2026 to Oct 20, 2026, summed over the 713 of 4,807 ETFs ETFIQ covers with a daily figure , Oct 20, 2026. ETFIQ \n +$90.1bn net flow into stock ETFs, Sep 21, 2026 to Oct 20, 2026, over the 322 of 1,739 with a daily figure , Oct 20, 2026. ETFIQ \n +$35.7bn net flow into bond ETFs, Sep 21, 2026 to Oct 20, 2026, over the 204 of 833 with a daily figure , Oct 20, 2026. ETFIQ \n\n Paper: Global ETF market, as of March 31, 2026. ETFIQ: the 746 of 4,807 ETFs ETFIQ covers with a daily figure, Sep 21, 2026 to Oct 20, 2026. Net flow is the change in shares outstanding times the day\u2019s NAV, summed over the days in the window, for the funds with a daily figure. The two sets and windows differ; the figures are stated, not reconciled. Method Data \n\n Related ETFs\n The funds the paper names that ETFIQ covers\n SPY SPDR S&P 500 ETF Trust: +16.4%\n Figure: total return, 1 year, to Oct 21, 2026, from each fund\u2019s page. All 4,807 ETFs in the screener \u2192 \n Related papers\n Investment Company Institute \u00b7 Industry body \u00b7 Oct 20, 2026 \u00b7 ETFIQ take\n Release: Estimated ETF Net Issuance \n In an October 2026 release, the Investment Company Institute estimated net ETF issuance of $53.26 billion for the week to October 14, 2026.\n Flows Bonds Read the paper \u2197 \n J.P. Morgan Asset Management \u00b7 Issuer \u00b7 Oct 15, 2026 \u00b7 ETFIQ take\n Guide to ETFs \n J.P. Morgan Asset Management's October 2026 Guide to ETFs counts 5,677 U.S. ETFs holding $16.3 Tn, with data through September 30, 2026.\n Flows Bonds Read the paper \u2197 \n First Trust \u00b7 Issuer \u00b7 Oct 7, 2026 \u00b7 ETFIQ take\n ETF Data Watch \n First Trust's October 2026 flows monitor shows US-listed ETFs took in $139.9 billion of net inflows in September, lifting total assets to $15.9 trillion.\n Flows Bonds Income Read the paper \u2197 \n All 16 papers on flows \u2192 \n Questions people ask\n What does the State Street Investment Management paper conclude? State Street Investment Management's July 2026 explainer, citing Morningstar, counts more than 14,000 ETFs worldwide holding $18.49 trillion. The paper\u2019s own words are at the link above. What does ETFIQ\u2019s data show on the same question? From Sep 21, 2026 to Oct 20, 2026, the ETFs ETFIQ can count had a net flow of +$127.9bn, with +$90.1bn for stock ETFs and +$35.7bn for bond ETFs. ETFIQ states both figures and does not reconcile them. What is an ETF\u2019s net flow? The change in its shares outstanding times its net asset value, summed over the days of a window: money in less money out. Where can I read \u201cWhy ETF growth is booming\u201d? On State Street Investment Management\u2019s own site. ETFIQ summarizes the paper and does not host it. ETFIQ, Why ETF growth is booming (State Street Investment Management), summary and ETFIQ take, as of Oct 21, 2026. https://etfiq.com/research/library/state-street-why-etf-growth-is-booming/ Free to use with attribution . Open data \n Summary by ETFIQ. ETFIQ is not affiliated with State Street Investment Management; logos identify the source.","source":"ETFIQ, independent ETF data. Recomputed nightly from public filings and prices.","publisher":{"@id":"https://etfiq.com/#org","name":"ETFIQ","url":"https://etfiq.com"},"license":"https://etfiq.com/license/","license_text":"Figures ETFIQ computes are free to use with attribution: ETFIQ (etfiq.com). Issuer data stays under its owner's terms.","citation":"ETFIQ, Why ETF growth is booming (State Street Investment Management), summary and ETFIQ take, as of Oct 21, 2026. https://etfiq.com/research/library/state-street-why-etf-growth-is-booming/"}