Note: Flow data is reported after close on a T+1 basis. The flows in this report reflect create/redeem activity from Tuesday, September 16, 2025.
We are now entering a key rebalancing period for many indexes and strategies. Over the next several days, it is common to observe outsized creation events in specific ETFs. These large inflows are often part of a tax-efficient rebalancing process and are typically followed by corresponding redemption activity two to three days later, which can create significant noise in the daily flows report.
Market Flow Summary
The U.S. ETF market recorded a total net inflow of $15.73 billion. The top issuer by inflow was Vanguard, which attracted $9.84 billion. The single fund with the largest inflow was the Vanguard Growth ETF (VUG). On the other side of the ledger, SPDR saw the largest outflows among issuers, shedding -$4.05 billion. The iShares U.S. Technology ETF (IYW) experienced the most significant single-fund outflow. The most notable high-velocity brand was Bluemonte, which saw outflows representing -8.63% of its aggregate assets under management.
Flow Summary by Asset Class
Equity led all asset classes in daily inflows, attracting +$13.80 billion, followed by Fixed Income with +$1.41 billion. On a year-to-date basis, Equity remains the dominant asset class, having accumulated +$460.11 billion in net new assets.
| Asset Class | 1D Flow | 1M Flow | YTD Flow |
|---|---|---|---|
| Equity | +$13.80B | +$79.22B | +$460.11B |
| Fixed Income | +$1.41B | +$42.26B | +$281.85B |
| Commodity | +$459.86M | +$5.99B | +$32.27B |
| Digital Asset | +$242.68M | +$3.65B | +$34.42B |
| Alternative | +$31.39M | +$592.65M | +$3.50B |
| Multi-Asset | +$16.24M | +$715.22M | +$3.71B |
| Non-Traditional | -$221.64M | +$4.27B | +$48.92B |
| Currency | -$2.71M | -$38.22M | +$539.84M |
Top/Bottom Five Category Flows
U.S. large-cap growth and blend strategies saw the most significant inflows, while information technology and small-cap blend funds experienced the largest redemptions.
Top 5 Category Inflows
| Category | 1D Flow |
|---|---|
| Equity: U.S. Large Cap – Growth | +$5.94B |
| Equity: U.S. Large Cap – Blend | +$4.69B |
| Equity: U.S. Mid Cap – Blend | +$1.68B |
| Equity: Sector – Industrial | +$1.40B |
| Equity: Thematic – Disruptive Tech | +$1.28B |
Bottom 5 Category Outflows
| Category | 1D Flow |
|---|---|
| Equity: Sector – Information Technology | -$2.60B |
| Equity: U.S. Small Cap – Blend | -$749.45M |
| Fixed Income: Taxable – Core Enhanced | -$693.30M |
| Equity: Sector – Consumer Staples | -$361.22M |
| Equity: Sector – Health Care | -$341.39M |
ETF Issuer Flow Analysis
Vanguard led all issuers with a +$9.84 billion inflow, representing +0.27% of its AUM. Conversely, SPDR experienced the largest outflow at -$4.05 billion, a -0.24% change in its AUM. Bluemonte stood out as the top high-velocity brand, with an outflow of -$174.28 million translating to a significant -8.63% of its total AUM.
Notably, the significant and often volatile flows seen in ARK’s suite of ETFs have continued in recent weeks. These recurring large-scale movements suggest that some institutional investors may be using these products as a tactical vehicle to gain or shed exposure to a specific basket of disruptive technology stocks.
Top 5 Brands by Inflows
| Issuer | Aggregate AUM | 1D Flow | 1D Flow as % of AUM |
|---|---|---|---|
| Vanguard | $3,669.27B | +$9.84B | +0.27% |
| iShares | $3,730.81B | +$7.37B | +0.20% |
| Dimensional | $223.61B | +$511.39M | +0.23% |
| Avantis | $81.43B | +$352.17M | +0.43% |
| VanEck | $106.27B | +$343.41M | +0.32% |
Bottom 5 Brands by Outflows
| Issuer | Aggregate AUM | 1D Flow | 1D Flow as % of AUM |
|---|---|---|---|
| SPDR | $1,711.19B | -$4.05B | -0.24% |
| ARK | $15.94B | -$552.27M | -3.35% |
| Direxion | $55.05B | -$431.20M | -0.78% |
| Bluemonte | $1.85B | -$174.28M | -8.63% |
| AB Funds | $8.93B | -$66.73M | -0.74% |
High-Velocity Brands (Aggregate AUM > $500M, 1D Flow > +/- 5% of AUM)
| Issuer | Aggregate AUM | 1D Flow | 1D Flow as % of AUM |
|---|---|---|---|
| Bluemonte | $1.85B | -$174.28M | -8.63% |
Significant Single-Fund Movements
The Vanguard Growth ETF (VUG) attracted the day’s largest inflow, gathering +$5.40 billion. The iShares U.S. Technology ETF (IYW) saw the largest redemption, with an outflow of -$2.74 billion.
Largest Absolute Daily Flows (Net Flows > $250M)
| Fund (Ticker) | AUM | 1D Flow | 1D Flow as % of AUM |
|---|---|---|---|
| Inflows | |||
| Vanguard Growth ETF (VUG) | $200.48B | +$5.40B | +2.77% |
| iShares S&P 100 ETF (OEF) | $26.19B | +$3.41B | +14.97% |
| iShares Core S&P 500 ETF (IVV) | $636.45B | +$2.35B | +0.37% |
| iShares U.S. Equity Factor Rotation Active ETF (DYNF) | $25.45B | +$1.96B | +8.36% |
| Vanguard Mid-Cap ETF (VO) | $90.11B | +$1.65B | +1.86% |
| iShares U.S. Aerospace & Defense ETF (ITA) | $10.91B | +$1.60B | +17.25% |
| Vanguard Total Stock Market ETF (VTI) | $543.27B | +$1.53B | +0.28% |
| iShares A.I. Innovation and Tech Active ETF (BAI) | $4.30B | +$1.44B | +50.43% |
| iShares 10-20 Year Treasury Bond ETF (TLH) | $12.37B | +$872.33M | +7.59% |
| iShares Gold Trust (IAU) | $55.97B | +$779.97M | +1.41% |
| Outflows | |||
| iShares U.S. Technology ETF (IYW) | $21.31B | -$2.74B | -11.38% |
| SPDR S&P 500 ETF Trust (SPY) | $669.77B | -$2.41B | -0.36% |
| iShares MSCI USA Quality Factor ETF (QUAL) | $53.03B | -$1.75B | -3.19% |
| Vanguard S&P 500 ETF (VOO) | $793.24B | -$954.94M | -0.12% |
| iShares Core Total USD Bond Market ETF (IUSB) | $33.85B | -$792.86M | -2.29% |
| iShares Russell 2000 ETF (IWM) | $68.83B | -$750.86M | -1.08% |
| SPDR Gold Shares (GLD) | $115.90B | -$510.27M | -0.44% |
| SPDR Dow Jones Industrial Average ETF Trust (DIA) | $39.13B | -$458.73M | -1.16% |
| iShares 20+ Year Treasury Bond ETF (TLT) | $48.61B | -$424.37M | -0.87% |
| Consumer Staples Select Sector SPDR Fund (XLP) | $15.57B | -$362.82M | -2.28% |
High-Velocity Inflows (AUM > $100M, 1D Flow > +5% of AUM)
| Fund (Ticker) | AUM | 1D Flow | 1D Flow as % of AUM |
|---|---|---|---|
| iShares ESG Aware MSCI USA Value ETF (EVUS) | $129.24M | +$109.36M | +550.00% |
| SPDR S&P Retail ETF (XRT) | $371.71M | +$135.56M | +57.40% |
| iShares A.I. Innovation and Tech Active ETF (BAI) | $4.30B | +$1.44B | +50.43% |
| Bluemonte Global Equity ETF (BINT) | $359.21M | +$119.87M | +50.08% |
| Innovator U.S. Equity Ultra Buffer ETF – September (USEP) | $217.46M | +$59.66M | +37.80% |
| T-Rex 2X Long HOOD Daily Target ETF (ROBN) | $248.32M | +$60.31M | +32.08% |
| THOR Index Rotation ETF (THIR) | $150.73M | +$36.52M | +31.98% |
| Franklin Responsibly Sourced Gold ETF (FGDL) | $347.19M | +$76.33M | +28.18% |
| Tradr 2X Short TSLA Daily ETF (TSLQ) | $539.06M | +$114.81M | +27.06% |
| Bluemonte Diversified Income ETF (BLUI) | $104.65M | +$19.71M | +23.21% |
| iShares U.S. Aerospace & Defense ETF (ITA) | $10.91B | +$1.60B | +17.25% |
| GraniteShares 2x Long AMD Daily ETF (AMDL) | $639.22M | +$88.68M | +16.11% |
| iShares S&P 100 ETF (OEF) | $26.19B | +$3.41B | +14.97% |
| ProShares Ultra VIX Short-Term Futures ETF (UVXY) | $569.77M | +$72.36M | +14.55% |
| Innovator U.S. Equity Buffer ETF – September (BSEP) | $227.81M | +$27.58M | +13.77% |
| Defiance Daily Target 2X Long HIMS ETF (HIMZ) | $163.75M | +$17.62M | +12.06% |
| John Hancock Multifactor Small Cap ETF (JHSC) | $680.61M | +$73.07M | +12.03% |
High-Velocity Outflows (AUM > $100M, 1D Flow > -5% of AUM)
| Fund (Ticker) | AUM | 1D Flow | 1D Flow as % of AUM |
|---|---|---|---|
| FT Vest International Equity Moderate Buffer ETF – September (YSEP) | $193.57M | -$96.50M | -33.27% |
| Innovator U.S. Equity Ultra Buffer ETF – February (UFEB) | $180.83M | -$60.57M | -25.09% |
| ARK Innovation ETF (ARKK) | $8.60B | -$2.46B | -22.25% |
| ARK Next Generation Internet ETF (ARKW) | $2.91B | -$620.70M | -17.56% |
| SPDR S&P Retail ETF (XRT) | $293.57M | -$61.27M | -17.27% |
| Innovator U.S. Equity Buffer ETF – March (BMAR) | $202.72M | -$23.09M | -10.23% |
| SGI Enhanced Core ETF (USDX) | $442.86M | -$49.76M | -10.10% |
| Defiance Daily Target 2X Long IONQ ETF (IONX) | $113.75M | -$8.92M | -7.27% |
| United States Oil Fund LP (USO) | $929.88M | -$66.83M | -6.70% |
Custom Analysis and Daily Data
The data summaries presented in this report were generated using the powerful dashboarding capabilities of the ETF Action Navigator tool. This institutional-grade platform provides users with the ability to conduct deep, customized analysis by filtering, sorting, and grouping the entire ETF universe across hundreds of distinct data points. From high-level asset class trends to granular single-fund metrics, Navigator allows for the creation of bespoke dashboards tailored to any workflow, ensuring you can track the flows and metrics that matter most to your strategy.
Large Flow Activity: Significant single-day inflows or outflows may not always represent typical market sentiment. Such anomalies can be linked to strategic actions, including tax-efficient rebalancing through custom create/redeem processes. Monitoring these flows over a multi-day period is recommended for a comprehensive analysis.
Disclosures
This material is for informational purposes only and should not be considered investment advice. All investments, including ETFs, involve risk, including the possible loss of principal. Investors should consider their investment objectives, risks, charges, and expenses carefully before investing.
This analysis was developed by the team at ETF Action. We leverage advanced AI tools to assist in the drafting and refinement of our content, based on our expert prompts, direction, and final review.
