Bitcoin dipped to nearly $75,000 earlier, down about 2% on the day, and the speed of the move drew attention.
Speculation quickly focused on BlackRock’s spot Bitcoin ETF, IBIT. CryptoPotato reports that multiple analysts pointed to a large IBIT block sale carried out through a dark pool at 10:30 AM on May 26. The headline number is big enough to stand out even among high-volume ETF prints.
What happened
CryptoPotato highlights a massive $1.289 billion IBIT block trade executed by an unknown party via a dark pool at 10:30 AM yesterday. ETF analyst Eric Balchunas said the trade involved about 29 million shares.
Balchunas also noted the trade “dwarfs all other trades for the day and perhaps ever.” CryptoPotato frames the timing as a possible trigger. The report says rumors are now circulating that the print could contribute to what would be the largest single-day Bitcoin ETF outflow on record.
In the same thread, Balchunas added that the “price unchanged today so mkt absorbed it well,” according to CryptoPotato.
Why it matters
If concentrated liquidity does play a role here, the lesson is less about a single trade and more about market structure. CryptoPotato warns that concentrated liquidity can amplify moves, especially when institutional flows matter more.
That risk cuts both ways. When large players like spot ETF issuers and corporate treasuries hold meaningful BTC exposure, the plumbing of order flow can become more sensitive to big prints, even if the market does not immediately reprice the same day.
Market impact
The immediate consequence in CryptoPotato’s account is a sudden downside candle cluster that traders link to the IBIT block trade. The report says the move lines up with the chart action and points to the dangers of liquidity concentration.
CryptoPotato also ties the broader backdrop to demand and custody. It notes “large corporate treasuries largely denominated in BTC,” framing them as additional holders whose behavior can influence how quickly liquidity gets pulled.
What to watch next
CryptoPotato’s key forward-looking question is flow confirmation. If the rumored “largest single-day Bitcoin ETF outflow on record” materializes, it will not just explain a day’s chart. It will also set a new benchmark for how fast ETF-related liquidity can turn.
Traders will also keep an eye on whether future large dark-pool prints correlate with abrupt intraday BTC moves, not just with the same-day ETF price behavior.
| Item | What’s reported | Source |
|---|---|---|
| BTC move | Dropped to nearly $75,000. About 2% down on the day | CryptoPotato |
| IBIT block trade | $1.289 billion dark-pool block sale at 10:30 AM | CryptoPotato |
| Trade size | ~29 million shares, described by Eric Balchunas as dwarfed all other trades | CryptoPotato, Eric Balchunas |
| Rumor to verify | Possible largest single-day Bitcoin ETF outflow on record | CryptoPotato |
CryptoPotato closes by linking the chart drop to the timing of the block trade and to structural liquidity risk from concentrated participation, especially with institutional and corporate BTC exposure increasing.