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Harvard Management Company (HMC) reduced its exposure to BlackRock’s iShares Bitcoin Trust (IBIT) by roughly 21% while establishing its first position in the iShares Ethereum Trust (ETHA), valued at about $86.8 million. The new ETH allocation corresponds to approximately 3.87 million ETHA shares, according to The Block.
HMC’s most recent 13F filing reflects a repositioning across BlackRock-issued crypto products. The filing indicates a reduction in bitcoin exposure alongside the addition of ether exposure. Both funds are issued by BlackRock under the iShares brand and provide spot-market exposure through exchange-traded structures, as summarized by Yahoo Finance.
The move is consistent with measured diversification across two different network assets and market structures. Rebalancing after a volatile period can help bring exposures back toward stated policy ranges without necessarily signaling a broad change in conviction.
Another interpretation referenced in the reporting points to market-structure dynamics. Andy Constan’s view, as summarized by CoinMarketCap Academy, links the IBIT trim to the unwinding of trades that benefited from bitcoin treasury companies trading at premiums to their holdings—suggesting a tactical shift rather than an ideological one.
Still, some academics caution against concentrated crypto exposure. Avanidhar Subrahmanyam, Professor of Finance at UCLA, said in comments reported by The Harvard Crimson that “any underdiversified position in something as speculative as crypto … does not make sense for HMC.”
For peer endowments, HMC’s actions may indicate a move away from single-asset concentration toward broader multi-asset coverage. Such steps can be viewed as risk management and thesis expansion rather than a directional market call.
For crypto markets, the rotation highlights growing institutional acceptance of spot ETFs as access points. Flows between bitcoin and ether vehicles may increasingly reflect portfolio construction decisions alongside valuation and liquidity conditions.
At the time of this writing, Ethereum traded near $1,971.84 with elevated volatility, based on Yahoo Scout data. That context may help explain why institutional rebalancing could occur without implying forward price views.
IBIT provides spot exposure to bitcoin through an exchange-traded fund structure, while ETHA provides spot exposure to ether. Both are designed to track their underlying assets through issuer-managed creation and redemption processes.
Liquidity and tracking can differ across tickers due to variations in trading volumes, spreads, and primary market activity. For endowments, the ETFs offer operational simplicity compared with direct custody, with NAV-based transparency typical of U.S.-listed ETFs.
Form 13F disclosures are backward-looking snapshots of long U.S.-listed equity and ETF holdings released on a delay. They do not capture derivatives, short positions, cash, or private assets, meaning the full picture of exposure may differ from what is shown in the filing.
HMC’s new position is about $86.8 million in BlackRock’s iShares Ethereum Trust (ETHA), or roughly 3.87 million shares, as reported by The Block.
The repositioning is described as aligning with diversification and rebalancing. One interpretation also ties the IBIT trim to market-structure unwinds noted by CoinMarketCap Academy.

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