A $1.29 billion block trade in BlackRock’s iShares Bitcoin Trust (IBIT) hit Nasdaq on Tuesday, drawing immediate attention from institutional traders and crypto markets. The transaction involved about 29 million shares and executed around 10:30 a.m. ET at roughly $43.16 per share in the United States. The size of the trade quickly raised questions about whether large investors were adjusting Bitcoin exposure or taking profits.
The order stood out because it exceeded IBIT’s typical daily volume in a single execution. Galaxy Digital’s Head of Research, Alex Thorn, flagged the transaction as a massive dark pool execution, while Bloomberg ETF analysts Eric Balchunas and James Seyffart identified it as an intermarket sweep order linked to a dark pool transaction. Despite the unusually large flow, Bitcoin held steady above $75,000, suggesting the market absorbed the trade without major disruption.
Institutional flows signal heavy repositioning
Alex Thorn described the transaction as the largest IBIT block trade he had seen, pointing to the $1.289 billion dark pool execution that dominated trading activity during the morning session. Meanwhile, Eric Balchunas confirmed on X that a massive 29 million-share IBIT trade worth roughly $1.3 billion crossed the market at 10:30 a.m. ET. Despite the size of the transaction, he noted that IBIT’s price held steady during the session, suggesting that the market absorbed the sale without major disruption.
In his data, IBIT moved towards $42.92, declining by around 1.47% amid wider market weakness. Moreover, IBIT also stayed under both its 50-day and 100-day simple moving averages, indicating weak technical momentum in the shorter term. Yet, even though the trend had not yet turned bearish, long-term support levels remained above the prevailing price levels.
ETF outflows add pressure on Bitcoin sentiment
Dark pools let large institutions trade privately without moving prices right away. In this case, the IBIT block trade likely points to hedging, portfolio rebalancing, or adjustments linked to structured products.
At the same time, SoSoValue data shows U.S. spot Bitcoin ETFs have now recorded eight consecutive trading days of net outflows, losing over $2 billion since mid-May. Tuesday’s session alone contributed to a steep $333.6 million industry-wide flush, with BlackRock’s IBIT bearing a major brunt by logging $192.4 million in net redemptions.
Fresh filings also indicate that several major players are trimming exposure. Jane Street and Goldman Sachs reduced their ETF positions, while Harvard Management Company cut its IBIT stake by roughly 43% and fully exited its Ethereum ETF holdings.
The shift has prompted analysts to reassess market sentiment. What earlier in the cycle was viewed as a “risk-on rally” is now showing signs of caution, as institutional flows turn more defensive.
Bitcoin itself has mirrored this volatility. The asset briefly dipped near $60,062 earlier in the year before recovering above $75,000, highlighting how rapidly sentiment among large investors continues to shift.
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