Bitwise's BITB fund added 640.34 BTC, a computed flow worth -$50.41 million, on Monday, August 31, according to the latest public holdings data from Bitwise and iShares. This marks the single largest inflow in the current Bitcoin ETF flows window, scoring a sharp reversal from a multi-session selloff that peaked just days prior.
XOOMAR Pulse Intelligence
Spot BTC & ETH ETF Flows & Holdings
A Monday Washout
The BITB fund's Monday flow, while the largest positive entry, ranks second by magnitude to a single epic outflow. On August 21, the fund posted a staggering computed flow of -$2.95 billion. That print remains the largest-magnitude movement in the stored tape. The sum of all tracked flows for BITB stands at $15.01 billion, illustrating the fund's significant churn during this period.
BITC’s Volatile Journey
BITB's narrative in this window splits cleanly into three phases: accumulation, washout, and recovery. The fund ramped up its holdings steadily, peaking at 38,295.25 BTC on Thursday, August 28. That date also saw a notable positive flow of $21.04 million. The subsequent two trading sessions defined the washout, culminating in the massive outflow event.
The Monday, August 31 print of 37,654.91 BTC represents a potent recovery signal. The addition of 640.34 Bitcoin is the largest positive flow this fund has logged, suggesting a strong vote of confidence from the market immediately following the shakeout.
BITB holdings and flow, every stored session
| Date | Holdings | Flow | AUM |
|---|---|---|---|
| 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 |
| 2026-08-28 | 38,295.25 BTC | $21.04 million | $2.97 billion |
| 2026-08-31 | 37,654.91 BTC | -$50.41 million | $2.96 billion |
| Note: A blank flow is a first snapshot, not a zero print. |
ETHW’s Quiet Stretch Before the Pump
Bitwise's Ethereum fund, ETHW, tells a quieter but notable story of anticipation. Its tape shows a period of dormancy spanning two stored sessions with precisely $0.00 flow, on Wednesday, August 26 and Thursday, August 27. This flatline was bookended by inflows. It ended with two distinct positive prints: a modest $873,976.13 on Tuesday, August 25, and a more substantial $1.39 million on Friday, August 28. These flows brought the fund's holdings to 110,567.22 ETH, held steady into Monday, August 31.
iShares Giants Await Update
The picture from iShares, via BlackRock, is currently static but massively scaled. IBIT and ETHA are each captured with a first holdings snapshot dated Monday, August 28. This is a limitation of stored data, not an indication of zero trading. Daily flow for these funds is unknown.
The scale is immense. IBIT's first holdings snapshot shows 777,235.15 BTC, dwarfing BITB's holdings by a factor of 20.6 times. ETHA's first snapshot is 3,474,413.56 ETH, a multiple of 31.4 times larger than ETHW. Combined, the tracked BTC holdings across both issuers total 814,890.06 BTC, representing a significant consolidated position in the market.
The Math Behind the Tape
These flows are not reported by the issuers. They are computed. For each ticker, XOOMAR takes the change in holdings from the previous stored row and multiplies it by the XOOMAR Bitcoin or Ethereum mark at the moment of data ingestion. This yields a dollar-denominated flow. A blank flow cell indicates the fund's first snapshot in the dataset, where no prior row exists for comparison. AUM is simply holdings multiplied by the XOOMAR mark. This methodology isolates the directional pressure from ETF-level buying or selling, as reflected in their on-chain reserves.
Perpetual Markets in Parallel
Here are Bitcoin and Ethereum perpetual marks from the same time, stored in a related Pulse. Caution: This table is context; do not claim ETF flows caused funding rates. These are two separate tapes timestamped together.
BTC and ETH marks and funding
| Asset | Exchange | Mark | Funding rate | Open interest notional |
|---|---|---|---|---|
| BTC | bybit | $78,689.10 | 0.00004180 | $4.18 billion |
| BTC | binance | $78,697.80 | 0.00009208 | n/a |
| ETH | bybit | $2,469.30 | 0.00004779 | $1.84 billion |
| ETH | binance | $2,469.23 | 0.00005759 | n/a |
What’s Next: The BlackRock Clock
The next major catalyst for the flow narrative is simple. It is the clock ticking down to the next IBIT or ETHA holdings file from iShares. A second snapshot for either BlackRock fund will unlock computed daily Bitcoin ETF flows for the world's largest spot Bitcoin ETF. Until then, the market reads the tape from Bitwise.
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.
