BITB added 75.97 BTC ($6.09 million computed flow) on Thursday, August 27th, 2026. The print looks like a rounding error next to the fund's single largest flow in this stored window, a $2.95 billion tidal wave from six days prior. XOOMAR's computed history for the Bitwise Bitcoin ETF covers four hundred and sixty two stored sessions, a tape showing how a benign headline print fits into a more volatile story. You can find the latest data via the Crypto ETF Flows hub and its ETF Flows API.
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The Headline Print
The trade-date headline is modest. The computed flow of $6.09 million ranks far below BITB's largest positive print, the $2.95 billion inflow on August 21st. In this stored window, it also falls short of the largest-magnitude flow, the same $2.95 billion event. The sum of all stored BITB flows, excluding the first null row, totals $15.04 billion, giving the latest $6.09 million move a weight of 0.04%.
The story for BITB is one of massive change, with holdings ballooning from just 150 BTC at launch to today's 38,023.91 BTC. That's a net addition of 37,873.91 coins across the entire stored series. While many days show small million-dollar moves, the $2.95 billion event is an unforgettable outlier.
BITB's Three-Act Drama
The stored tape for BITB doesn't show a steady trend. It reads more like a volatile three-act play. The story begins with a long accumulation phase, building to a holdings peak of 38,023.91 BTC on August 27th, 2026. That crescendo was immediately preceded by the massive, singular washout flow of $2.95 billion. Now the narrative appears to be in a recovery phase, with the portfolio size still anchored near a $3.05 billion AUM level.
| Date | Holdings | Flow | AUM |
|---|---|---|---|
| 2026-08-21 | 37,752.58 BTC | $2.95 billion | $2.96 billion |
| 2026-08-24 | 37,871.97 BTC | $9.40 million | $2.98 billion |
| 2026-08-25 | 37,909.95 BTC | $2.99 million | $2.98 billion |
| 2026-08-26 | 37,947.94 BTC | $2.99 million | $2.99 billion |
| 2026-08-27 | 38,023.91 BTC | $6.09 million | $3.05 billion |
The full holding series carries the rest of the points, but the shape is a volatile build, a single dramatic flush, and a tentative march back.
The ETHW Dry Spell
Bitwise's Ethereum ETF, ETHW, presents a quieter but equally pointed picture. For two consecutive stored sessions, the fund posted a computed flow of $0.00. This streak of zero-flow stored sessions is a data artifact, not an indicator of market activity. The series from 2024-07-23 to 2026-08-27 shows several significant inflows and outflows, including a $272.74 million jump on August 21st and a more recent $873,976.13 inflow on August 25th, but the tape ends with the zero-flow entries for the 26th and 27th.
Just days before, on August 21st, ETHW's holdings leapt from 1,055 ETH to 108,707.95 ETH, marking a one-day computed flow of $272.74 million. That wild swing is the starkest part of its stored tape. Over its entire recorded history, ETHW's holdings have swung from a low of just 10 ETH to its current holding level of 109,995.14 ETH.
The Giants' First Snapshots
The dataset introduces behemoth first snapshots for two iShares funds dated August 26th. IBIT holds 774,200.26 BTC, a staggering 20.4 times larger than BITB's current stash. ETHA holds 3,388,116.52 ETH, a multiple of 30.8 times ETHW's holdings. Combined, these four tickers represent a massive synthetic buying pool: 812,224.17 BTC and 3,498,111.66 ETH.
Because these are the first stored rows for IBIT and ETHA, no daily flow can be computed. A missing flow is a first snapshot, not a zero print. The next filing for either fund will unlock the true daily inflow or outflow magnitude. These initial holdings dwarf the smaller funds. For context, the combined total of 812,224.17 BTC across both Bitcoin funds is worth over $65 billion at today's mark.
How the Flow is Calculated
The computed flow figures are a XOOMAR reading of public issuer data. Holdings come from issuer files. For BITB and ETHW, XOOMAR reads embedded baskets from the Bitwise fund pages. For IBIT and ETHA, it uses the latest-holdings.csv file from iShares. The date on each row is the issuer's as-of date. Computed flow is simply the change in holdings versus the previous stored row for that ticker, multiplied by the XOOMAR market price at the moment of data ingestion. AUM is holdings times that same XOOMAR mark. A first snapshot has no previous row, so flow is absent.
Spot Market Context
Related marks from perpetual futures contracts are timestamped near the ETF data. They provide pricing context but no established causation. These are two separate Pulse tapes.
| Asset | Exchange | Mark | Funding Rate | Open Interest |
|---|---|---|---|---|
| ETH | bybit | $2,510.32 | 0.00000455 | $1.87 billion |
| ETH | binance | $2,510.27 | 0.00002149 | not available |
| BTC | binance | $80,177.34 | 0.00007772 | not available |
| BTC | bybit | $80,174.90 | 0.00003262 | $3.90 billion |
A full view of funding dynamics is available on the Funding Rates hub. The snapshot here simply shows the marks used in the ETF AUM calculations.
What's Missing
Daily flow for IBIT and ETHA remains unknown. There's no prior row to compare against. This dataset also contains no forecast or consensus numbers to "beat" or "miss". We don't know if BITB's 75.97 BTC addition came from creations, a mix of redemptions, or was a pricing artifact. The tape only shows the net delta holdings multiplied by the mark. Holdings for any ETF ticker not listed are also absent. The next IBIT or ETHA holdings file will be the most significant unlock for Bitcoin ETF flows in this series.
While BITB's story is one of immense volatility, with a peak single-day inflow of $2.95 billion, today's addition of 75.97 BTC is a minor, almost negligible move on that scale. It's a small step in a much larger, chaotic journey.
Primary Sources & Disclosures
Disclaimer: Content on XOOMAR is produced using AI-assisted research, drafting, and verification workflows and is intended for informational and educational purposes only. It does not constitute financial, investment, legal, tax, medical, or professional advice of any kind. All analysis reflects available information at the time of publication and may not be current. Verify information independently and consult qualified professionals before making decisions. Editorial policy
Written by
XOOMAR Insights Team
Research and Editorial Desk
The XOOMAR Insights Team pairs automated research with human editorial judgment. We track hundreds of sources across technology, fintech, trading, SaaS, and cybersecurity, cross-check the facts, and explain what happened, why it matters, and what to watch next. We do not just rewrite headlines. Every article is fact-checked and scored for reliability before it goes live, and we link back to the original sources so you can verify anything yourself.
