Dark pools exist so big investors can sell without anyone noticing. On Tuesday morning, someone sold $1.29 billion of BlackRock's bitcoin ETF in one - a trade big enough that everyone saw it anyway.
It landed in the middle of a seven-day outflow streak from spot bitcoin ETFs, the second-longest losing run since these funds launched in January 2024.
At 10:30 a.m. ET on Tuesday, a single investor dumped $1.29 billion worth of shares in IBIT - BlackRock's spot bitcoin ETF and the largest of its kind in the world.
The sale ran through a dark pool, a private venue where the biggest players can move huge amounts of stock without alerting the market or shifting the price.
Alex Thorn, head of research at Galaxy, flagged the trade on X and called it the biggest of its kind he has ever seen.
The whole point of using a dark pool is to stay invisible, which makes the fact that this one got spotted a tell of just how large it was.
When the biggest investors start moving quietly, we break down what it means every morning in Market Briefs - five minutes a day, with a free investing masterclass thrown in when you join.
Net outflows from the 11 U.S.-listed spot bitcoin ETFs hit $334 million on Tuesday, the seventh straight day investors pulled money out.
That's the second-longest losing streak since these funds launched in January 2024. The only longer stretch was eight trading days, which has happened twice - in late August-early September 2024 ($1.2 billion withdrawn) and again in February 2025 ($3.3 billion withdrawn).
The bigger picture: Spot bitcoin ETFs let investors get exposure to bitcoin through a regular brokerage account without holding the crypto directly. They've pulled in tens of billions in net inflows since launch, which makes the current reversal stand out.
IBIT itself lost $192.44 million in net redemptions for the day. The whale's $1.29 billion sale didn't fully translate into outflows because buyers stepped in to absorb a chunk of it, but the direction of money is hard to miss.
Over the past two weeks, investors have yanked $2.26 billion from these ETFs, with bitcoin dropping from above $82,000 on May 6 to under $77,000 in the same window.
A single $1.29 billion sale doesn't prove anything on its own - people take profits, funds rebalance, and whales move money for reasons that have nothing to do with bitcoin's future.
But when one of the biggest dark-pool trades on record lands in the middle of a seven-day outflow streak, it's worth asking who's selling and why.
Dark pools are supposed to keep that question quiet. This one didn't.
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