Key Takeaways
- An unidentified investor offloaded $1.26 billion in BlackRock’s IBIT ETF shares through a single off-exchange block transaction on May 26
- The transaction occurred at a 2.3% discount—approximately $29.5 million below market value—indicating urgency over price optimization
- Crypto investment firm NYDIG dismissed speculation about a basis trade closure, citing the steep discount and absence of corresponding CME bitcoin futures activity
- The size of the divested position exceeded any individually reported IBIT holdings in recent 13F regulatory filings, obscuring the seller’s identity
- Spot bitcoin ETFs in the U.S. experienced consecutive daily outflows between May 15 and May 29, with aggregate holdings declining from $107.75 billion to $94.17 billion
A mysterious market participant liquidated $1.26 billion in shares of BlackRock’s iShares Bitcoin Trust through a single off-market transaction on May 26. The substantial divestment sparked widespread speculation throughout the cryptocurrency community regarding both the seller’s identity and motivation.
The deal comprised 29.21 million IBIT shares executed at $43.16 apiece. This represented a $1.01 markdown from the prevailing market quote of $44.17—translating to a 2.3% haircut valued at roughly $29.5 million.
The execution was processed via the FINRA/Nasdaq TRF Carteret platform, which facilitates privately arranged transactions conducted away from public exchanges.
NYDIG Dismisses Basis Trade Unwinding Hypothesis
Certain market commentators speculated the divestment might relate to unwinding a bitcoin basis trade—an investment approach where hedge funds maintain long spot bitcoin positions while simultaneously shorting futures contracts. NYDIG, a cryptocurrency-focused investment firm, rejected this interpretation.
NYDIG highlighted two critical factors undermining this theory. Primarily, absorbing a $29.5 million discount would have substantially eroded—if not eliminated—potential returns from such an arbitrage strategy. Additionally, CME bitcoin futures trading volumes showed no abnormal elevation coinciding with the block transaction.
The IBIT holdings involved corresponded to approximately 3,700 CME bitcoin futures contracts. However, merely 91 contracts changed hands during the identical sixty-second window. This significant discrepancy rendered a basis trade closure improbable, according to Greg Cipolaro, NYDIG’s global head of research.
Seller Identity Remains Elusive
NYDIG noted the divested position surpassed any single IBIT stake documented in recently filed 13F reports. This circumstance complicates efforts to identify the seller through publicly accessible information.
The research firm acknowledged uncertainty whether the liquidation stemmed from client redemption pressures, portfolio risk constraints, or a deliberate decision to reduce bitcoin market exposure. While IBIT registered approximately $720 million in net withdrawals across May 26 and 27, standard ETF flow metrics cannot definitively connect to specific block transactions.
What NYDIG emphasized is that a substantial stakeholder willingly accepted significant losses to achieve rapid liquidation, coinciding with a period of widespread bitcoin ETF capital flight.
Sustained Bitcoin ETF Capital Exodus Throughout May
U.S. spot bitcoin exchange-traded funds recorded net capital withdrawals across each trading session spanning May 15 through May 29. Cumulative assets held by bitcoin ETFs contracted from $107.75 billion on May 14 to $94.17 billion by month’s end.
Bitcoin has depreciated 16% year-to-date. Concurrently, traditional equity markets and commodity sectors have posted gains, with investment capital migrating from digital assets toward artificial intelligence equities and precious metals.
The IBIT block transaction represents among the largest documented single-position exits from a bitcoin ETF vehicle. It materialized during arguably the most persistent outflow cycle bitcoin ETFs have encountered since their market introduction.
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