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, marking HMC's initial publicly disclosed Ethereum ETF stake, as reported by The Block (https://www.theblock.co/post/389996/harvard-bitcoin-ether-etf-holdings/?utm_source=openai).