Whale Unloads Massive IBIT Position
A single, unidentified investor executed a striking $1.3 billion sale of BlackRock’s iShares Bitcoin Trust ETF (IBIT) shares in a dark pool on Tuesday, marking one of the largest block trades ever seen in the short history of US spot bitcoin ETFs. The transaction, which involved 29.2 million IBIT shares at $43.16 each, occurred at 10:30 a.m. ET and dwarfed all other sell orders for the day—exceeding the next largest by more than 22 times.
Dark pools are private exchanges where large institutional players can buy or sell significant amounts of assets away from public order books, minimizing immediate market disruption. In this case, however, the sheer size of the trade reverberated through both ETF and spot bitcoin markets almost immediately.
The identity and motive behind the whale-sized exit remain unknown.
Block Trade Sends Bitcoin Sliding
The timing of the $1.3 billion IBIT sale coincided with a sharp move in bitcoin’s price. Within just ten minutes after the block trade at 2:30 p.m. UTC, bitcoin dropped 1.5%, falling from $77,875 to $76,720 as tracked by TradingView data. Over the rest of the day, bitcoin extended its slide to a low of $75,600—ultimately ending down 2.8% for the session.
On paper, dark pool trades are designed to prevent sudden price swings by keeping large orders off public exchanges; yet here, the effect was swift and visible across both ETF and crypto markets.
This market reaction highlights how even off-exchange activity can spill over into broader sentiment when volumes reach historic proportions.
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Seven Days of ETF Outflows
Tuesday’s mega-sale landed during an already challenging period for US spot bitcoin ETFs. The funds recorded net outflows for seven consecutive trading days—a stretch only surpassed twice since their January 2024 launch. According to coindesk.com, total net outflows from all eleven spot bitcoin ETFs reached $334 million on Tuesday alone, with IBIT accounting for $192.4 million in redemptions.
Over the past two weeks, investors have withdrawn approximately $2.26 billion from these funds. Previous streaks lasted eight trading days and saw outflows totaling $1.2 billion and $3.3 billion respectively—putting this recent run among the most sustained periods of negative flows so far in ETF history.
Why the Sale Spooked Markets
The scale and anonymity of Tuesday’s block trade unsettled traders already wary after weeks of steady outflows from major bitcoin investment vehicles. While IBIT processed nearly 29 million shares in a single transaction, its net redemptions for the day—$192.4 million—were still only a fraction of that headline number due to offsetting inflows and other market activity.
Bitcoin itself has retreated sharply since peaking above $82,000 on May 6; by Tuesday it was trading below $77,000 before dipping further to around $75,825 later in the day—a drop of about 7% over two weeks according to CoinGecko data.
Record-Size Dark Pool Activity
This trade stands out not just for its dollar value but also as a signal of shifting market structure within crypto-linked investment products. Bloomberg ETF analyst Eric Balchunas called it “the largest trade” he has observed in IBIT’s brief existence—over twenty times larger than any other order on Tuesday—and Alex Thorn noted that it was unprecedented in scale for dark pools tied to bitcoin ETFs.
Despite such volume moving behind closed doors, liquidity concerns persist as ETF outflows accelerate: more than $2 billion has exited US spot bitcoin ETFs since May 14—the last time any fund recorded a net inflow across all products tracked.
Whether this record-setting trade changes the framework or just another chapter in crypto’s ongoing volatility is uncertain.
What the market will watch
If US spot Bitcoin ETFs post an eighth consecutive day of net outflows—matching the longest streaks seen in late August-early September 2024 and February 2025—immediate attention will focus on whether redemptions surpass the $333.6 million recorded on Tuesday, as this would signal continued large-scale withdrawals following the $1.3 billion IBIT dark pool trade.
