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Bitcoin ETF flows explained: how to read inflows and outflows
A flow is the dollar value of ETF shares created minus shares redeemed. This guide shows where the numbers come from, why headline totals can mislead, and walks through a real flow table from October 2026.
Key takeaways
- Bitcoin ETF flows measure the dollar value of new fund shares created minus shares redeemed on a given US trading day. A positive number is an inflow, a negative number an outflow.
- The headline is a net figure across all US spot bitcoin ETFs. On October 19, 2026, a $526.6 million net inflow came almost entirely from BlackRock's IBIT, while Fidelity's FBTC and Grayscale's GBTC lost money, according to SoSoValue data reported by CoinDesk.
- Flow data is only complete after the US close, so it always runs at least one session behind live prices. Smaller funds sometimes report a day late, and figures can be revised.
- On October 22, 2026, US spot bitcoin ETFs saw a $635.49 million net outflow, turning October's month-to-date total negative at about -$174.5 million (SoSoValue via TFTC and TokenPost).
- Research links flows and the bitcoin price, but the relationship runs in both directions and a correlation is not proof that flows cause price moves.
Bitcoin ETF flows are the dollar value of fund shares created minus shares redeemed on a US trading day: a positive number is an inflow, a negative one an outflow. On October 22, 2026, US spot bitcoin ETFs saw a $635.49 million net outflow, per SoSoValue.
What bitcoin ETF flows actually measure
Bitcoin ETF flows are the net value of shares a fund creates or redeems in a day. When a fund issues more shares than it cancels, it records an inflow. When it cancels more than it issues, it records an outflow.
A flow is not the same as trading volume. Every time one investor sells IBIT shares to another on Nasdaq, the share count does not change, so no flow is recorded. A flow only happens when a large dealer, called an authorized participant, goes to the fund itself to create new shares or hand old ones back.
The iShares Bitcoin Trust's filings describe how this works. The trust issues and redeems shares only in blocks of 40,000 shares, called baskets, and only registered broker-dealers with an agreement with the sponsor can place those orders. The value of each basket is set by the trust's daily net asset value (NAV), which is based on the CME CF Bitcoin Reference Rate (New York Variant) at 4:00 p.m. ET.
When an authorized participant creates a basket, the fund ends up holding more bitcoin. When it redeems one, the fund holds less. That is why flows are watched as a rough gauge of how much bitcoin the funds are adding or releasing.
Cash versus in-kind creations
When the SEC approved the first US spot bitcoin exchange-traded products on January 10, 2024, they were limited to cash creations and redemptions. In that model the fund itself buys or sells bitcoin on the market. On July 29, 2025, the SEC approved orders that allow in-kind creations and redemptions, in which authorized participants deliver or receive bitcoin directly. IBIT's 10-Q says the trust is now authorized to transact in kind as well as in cash. Either way, the flow number reported each day is a dollar value, not a count of trades.
Net flow vs per-issuer flow: why the headline can mislead
Most headlines quote one number: the combined net flow of all US spot bitcoin ETFs. That number can hide large moves in opposite directions underneath.
October 19, 2026 is a clear example. According to SoSoValue data reported by CoinDesk, the funds took in a combined $526.6 million, the largest daily inflow in nearly a month. But IBIT alone took in $665.2 million. FBTC lost $83.6 million and GBTC lost $54.9 million, and the other funds had no net flow. In other words, one fund drew more than the entire headline total, and the rest of the group was flat or negative.
Cumulative figures tell the same story over a longer period. Bloomingbit, citing SoSoValue, put total net inflows into US spot bitcoin ETFs since launch at about $57.32 billion as of October 22, 2026. IBIT on its own had about $66.24 billion of net inflows, while GBTC had about $28 billion of net outflows. GBTC was converted from an older closed-end trust when the ETFs launched in January 2024. FXStreet reported in March 2024 that it charged a 1.5% annual fee, against an average of about 0.30% for the other spot bitcoin ETFs. That is why its long run of outflows has to be netted against everyone else.
So the first step in reading flows is simple: always look at who is moving the money, not just the total.
Where bitcoin ETF flow data comes from and why it lags
There is no single official daily flow report. Each issuer publishes its own fund data, such as shares outstanding and bitcoin held, on its website after the US close. Data firms then turn those changes into a daily dollar flow.
The most quoted sources are SoSoValue and Farside Investors. Many news outlets, including CoinDesk and TokenPost, cite SoSoValue. TFTC, which publishes a free daily table, says it takes daily totals from SoSoValue and older per-fund history from Farside's tabulation of issuer disclosures.
Several things make the data lag or shift:
- It is only final after the close. IBIT's filing says NAV is calculated after 4:00 p.m. ET and is typically released by 5:30 p.m. ET. TFTC notes that because flows are reported after the US close, the data "always runs at least one session behind live trading."
- Some funds report late. TFTC warns that the newest session can change because some smaller funds report a day late. A total published on the evening of a trading day can move the next morning.
- Revisions happen. TFTC re-reads about 300 sessions of SoSoValue data on each update, so a corrected number can replace an old one.
- Rounding differs. Trackers round to one or two decimals and may differ by a few hundred thousand dollars on the same day.
In practice, this means the "today" figure you see in the morning in Asia or Europe almost always describes the previous US session. Our crypto daily brief for October 22, for example, carried flows through October 21, because the October 22 numbers were not yet published at the time of writing.
How to read a bitcoin ETF flow table: a worked example
The table below shows four US sessions from the week of October 19, 2026, using SoSoValue figures. Values are in US$ millions; negative numbers are outflows.
| Fund (issuer) | Oct 19 | Oct 20 | Oct 21 | Oct 22 |
|---|---|---|---|---|
| IBIT (BlackRock) | +665.2 | +29.9 | +235.0 | -254.1 |
| FBTC (Fidelity) | -83.6 | +3.6 | +212.7 | -217.5 |
| ARKB (ARK Invest / 21Shares) | 0.0 | 0.0 | +9.8 | -109.4 |
| BITB (Bitwise) | 0.0 | -10.3 | +19.2 | -27.4 |
| GBTC (Grayscale) | -54.9 | 0.0 | +32.6 | -29.5 |
| BTC (Grayscale Mini) | 0.0 | 0.0 | +8.2 | 0.0 |
| MSBT (Morgan Stanley) | 0.0 | 0.0 | 0.0 | +2.3 |
| Other funds (EZBC, BRRR, BTCO, HODL, BTCW) | 0.0 | 0.0 | +10.9 | 0.0 |
| Total net flow | +526.6 | +23.2 | +528.4 | -635.5 |
Sources: October 19 from CoinDesk (SoSoValue data); October 20–22 from TFTC's October 2026 table (SoSoValue); October 22 per-fund figures cross-checked with TokenPost and Bloomingbit (SoSoValue). Totals may differ from the sum of rows by 0.1 because of rounding.
Here is how to read it, step by step.
- Check the date. Each column is one US trading session. The October 22 column was published after that day's close and picked up by news outlets early on October 23 UTC.
- Read the total, then the rows. October 22's total of -$635.5 million looks broad, and it was: five funds lost money and only MSBT gained. IBIT and FBTC together made up about 74% of the outflow, according to Bloomingbit.
- Compare the days. October 19 and October 21 both show inflows of about $527 million to $528 million, but they are very different days. October 19 was almost all IBIT. October 21 was spread across eight funds.
- Add up the period. The four sessions sum to about +$442.7 million for the week through Thursday. Even so, the October 22 outflow pushed the month-to-date total to about -$174.5 million, according to TFTC.
- Scale it. IBIT listed about $66.9 billion in assets on StockAnalysis on October 23, so its $254.1 million outflow was well under 1% of the fund. Big headline numbers can be small relative to fund size.
- Translate it into baskets or bitcoin. IBIT closed at $46.06 on October 22, according to StockAnalysis, so one 40,000-share basket was worth roughly $1.84 million. A $254.1 million outflow is therefore roughly 138 baskets. At March 31, 2026, the trust held 783,744 bitcoin against 1,382,480,000 shares, or about 0.000567 bitcoin per share, which puts one basket near 22.7 bitcoin. These are approximations, because flows are valued at NAV rather than the closing price and the bitcoin per share falls slowly as the 0.25% sponsor fee is deducted.
Key facts about the two largest funds
| Item | IBIT (iShares Bitcoin Trust) | FBTC (Fidelity Wise Origin Bitcoin Fund) |
|---|---|---|
| Sponsor fee / expense ratio | 0.25% a year (10-Q) | 0.25% (StockAnalysis) |
| Creation/redemption unit | 40,000 shares (10-Q) | Not verified for this article |
| Bitcoin held | 783,744 BTC at Mar 31, 2026 (10-Q) | Not verified for this article |
| Shares outstanding | 1.38 billion at Mar 31, 2026 (10-Q); about 1.43 billion listed Oct 23, 2026 (StockAnalysis) | About 202.9 million listed Oct 23, 2026 (StockAnalysis) |
| Assets | About $66.9 billion listed Oct 23, 2026 (StockAnalysis) | About $14.5 billion listed Oct 23, 2026 (StockAnalysis) |
| Close on Oct 22, 2026 | $46.06, down 3.72% | $70.74, down 3.72% |
| Net flow on Oct 22, 2026 | -$254.05 million | -$217.46 million |
Sources: iShares Bitcoin Trust Form 10-Q for the quarter ended March 31, 2026 (SEC EDGAR); StockAnalysis fund pages checked October 23, 2026; TokenPost and Bloomingbit (SoSoValue) for flows. Issuer websites were not reachable when this article was prepared, so StockAnalysis figures are third-party listings.
Do ETF flows move the bitcoin price? What the evidence says
This is the question most readers care about, and the honest answer is: partly, sometimes, and not in a straight line.
A study by Mieszko Mazur and Efstathios Polyzos in the Journal of Alternative Investments (2025) found that net flows into spot bitcoin ETFs strongly predicted bitcoin price levels in the first weeks after launch and called flows the dominant single factor in that period. The same study found that most bitcoin price changes happened outside ETF trading hours, and that rising prices led to abnormal ETF trading volume. That points to a two-way relationship: flows can follow price as much as lead it.
Industry research reaches similar mixed conclusions. In October 2024, FalconX head of research David Lawant published a statistical (Granger causality) test in which ETF flows helped predict the bitcoin price, but it noted that this kind of test does not prove true causation.
The October 2026 data shows why caution is needed. Spot bitcoin ETFs took in $528.4 million on October 21, yet bitcoin fell about 3% over the following UTC day as oil prices rose and chip stocks slid, as we reported in our October 22 crypto brief. The large outflow came on October 22, the same day IBIT and FBTC each fell 3.72%. In that case the outflow arrived alongside the drop, not before it. For more on how investors used options during that selloff, see our explainer on bitcoin downside-protection ETFs.
A fair reading: flows show how ETF investors, as a group, are positioning. They are one input among many, alongside the derivatives market, macroeconomic news and trading on offshore exchanges that never touches an ETF.
Ether ETF flows: same method, different market
US spot ether ETFs work the same way. The SEC approved the exchange rule changes in May 2024, and the funds began trading on July 23, 2024. Trackers report their flows in the same net creation-minus-redemption format.
Ether fund flows often diverge from bitcoin's. On October 19, 2026, when bitcoin ETFs took in $526.6 million, ether ETFs lost $103.3 million, with BlackRock's ETHA accounting for $95.4 million of that, according to CoinDesk. Cointelegraph, citing SoSoValue, reported about $1.08 billion of net outflows from US spot ether ETFs in October through October 20, the largest monthly outflow since November 2025. For background on what is changing on the Ethereum network itself, see our explainer on Ethereum's fast-finality proposal.
What it means
Bitcoin ETF flows are a useful, public record of how much new money is entering or leaving the US spot funds each day. They are most informative when read with three checks: which funds drove the total, how large the move is compared with fund assets, and whether the day's figure is complete. A single big inflow day, as on October 19, can come from one fund. A month can stay negative even after a strong week, as October 2026 shows.
Flows also arrive late, so they describe what has already happened rather than what will happen next. For a running view of the market around these numbers, see our October 21 crypto market check and our explainer on JPMorgan's long-term bitcoin assumption.
Frequently asked questions
What do bitcoin ETF inflows and outflows mean?
An inflow means a fund created more new shares than it redeemed that day, so it took in money and usually added bitcoin. An outflow means more shares were redeemed than created. Ordinary buying and selling of ETF shares between investors on the exchange does not count as a flow.
Where can I find daily bitcoin ETF flow data?
Issuers publish fund data such as shares outstanding and bitcoin held on their websites after the US close. Trackers such as SoSoValue and Farside Investors turn those changes into daily dollar flows, and sites such as TFTC republish them in free tables.
Why are bitcoin ETF flows reported a day late?
Flows can only be calculated after the US market closes and each fund publishes its data. IBIT's NAV is typically released by 5:30 p.m. ET, and some smaller funds report a day late, so the latest figure always describes the previous US session and can be revised.
How much flowed out of bitcoin ETFs on October 22, 2026?
US spot bitcoin ETFs had a net outflow of $635.49 million on October 22, 2026, according to SoSoValue data. BlackRock's IBIT lost $254.05 million and Fidelity's FBTC lost $217.46 million, while Morgan Stanley's MSBT was the only fund with an inflow.
Sources
- TFTC: Bitcoin ETF Flows, October 2026 (SoSoValue data)
- TFTC: Bitcoin ETF Flows methodology
- CoinDesk: Bitcoin ETFs just saw their biggest day in a month thanks entirely to BlackRock (Oct 20, 2026)
- TokenPost: Five of 12 spot bitcoin ETFs post outflows as $635.49 million exits in a day (Oct 23, 2026)
- Bloomingbit: US spot bitcoin ETFs see more than $600 million in one-day net outflows (Oct 23, 2026)
- SEC EDGAR: iShares Bitcoin Trust ETF Form 10-Q, quarter ended March 31, 2026
- SEC: Statement on the approval of spot bitcoin exchange-traded products (Jan 10, 2024)
- SEC: SEC permits in-kind creations and redemptions for crypto ETPs (July 29, 2025)
- Cointelegraph: Ether ETF outflows near $1.1 billion in October (Oct 21, 2026)
- The Defiant: SEC grants final approval to spot ether ETFs (July 2024)
- StockAnalysis: IBIT fund data
- StockAnalysis: FBTC fund data
- Mazur and Polyzos, "Spot Bitcoin ETFs: The Effect of Fund Flows on Bitcoin Price Formation," Journal of Alternative Investments (2025)
- FalconX: What can spot ETF flows tell us about the trajectory of bitcoin prices?
- FXStreet: Two theories why GBTC sticks to high fees despite bleeding billions (Mar 26, 2024)
This article is for information only and is not investment advice.
