Overview
In May 2026, US spot Bitcoin ETFs experienced one of the most dramatic outflows since their launch. Within two weeks, over $2.26 billion flowed out of the market, putting downward pressure on Bitcoin prices, which fell to around $74,300. This was not a simple short-term fluctuation—Harvard's endowment fund reduced its holdings by 43%, and BlackRock's flagship product suffered a single-day outflow of over $400 million. Institutional signals are converging, and the market is reassessing the depth and sustainability of this "institutionalized market."
Key Takeaways
The U.S. spot Bitcoin ETF recorded a net outflow of approximately $2.26 billion in the two weeks ending May 23, 2026, marking one of the deepest single-cycle drawdowns since its launch in January 2024.
On May 18, $649 million flowed out in a single day, marking the third-largest single-day net redemption this year, with BlackRock IBIT accounting for $448 million.
Harvard University's endowment fund reduced its IBIT holdings by 43% in Q1 2026 and completely liquidated its Ethereum ETF holdings.
Rising US Treasury yields, stronger-than-expected inflation data, and heightened expectations of a Federal Reserve rate hike constitute the main macroeconomic drivers of this round of capital outflows.
Bitcoin found support in the $74,000 to $77,000 range, but analysts warn that if this range is breached, the next support level is at $70,000.
Meanwhile, Abu Dhabi's sovereign wealth fund, Mubadala, increased its holdings in IBIT to approximately $566 million, highlighting a clear divergence among institutional investors.
What does the $2.26 billion outflow mean?
The scale of this investment needs to be understood within its context. Since the approval of U.S. spot Bitcoin ETFs in January 2024, these products have absorbed a cumulative net inflow of over $57.1 billion, with total assets under management once approaching $99 billion. According to The Block , in the week of May 15-23 alone, spot Bitcoin ETFs experienced net outflows of $1.26 billion, the largest single-week withdrawal since the end of January 2026.
The previous week's outflow of approximately $1 billion, combined with the previous week's net outflow, brought the total net outflow over two weeks to over $2.26 billion. COINOTAG's analysis indicates that these 11 US-listed Bitcoin ETFs experienced the most concentrated redemption pressure during this period, causing the price of Bitcoin to fall to approximately $74,300.
However, it's equally noteworthy that even after the most severe single-day outflow, BlackRock IBIT's net assets remained at $61.1 billion, and the overall asset size of the ETF system did not collapse. As Investing.com analysts pointed out , the $649 million single-day outflow represented approximately 0.76% of the total AUM at that time, which did not constitute a systemic collapse, but was certainly a signal worth noting.
Who is retreating, and who is adding to their positions?
The main figures revealed in this round are clearly identifiable.
BlackRock (IBIT) saw the largest single-day redemption. According to Bitcoin.com , on May 18th alone, IBIT experienced a net outflow of $448 million, while the Ethereum ETF (ETHA) saw a net outflow of $55.4 million on the same day, marking one of the largest single-day redemptions this year.
At the institutional level, the actions of Harvard University's endowment fund are particularly noteworthy. SEC 13F filings show that Harvard Management Company (HMC) reduced its IBIT holdings from approximately 5.35 million shares to approximately 3.04 million shares in the first quarter of 2026, a decrease of 43%, involving approximately $117 million; simultaneously, the fund also completely liquidated its BlackRock Ethereum ETF (ETHA) position, valued at approximately $86.8 million. TechFlow, citing a Fortune report , points out that this is the third consecutive quarter that Harvard has reduced its cryptocurrency ETF exposure.
However, not all institutions are taking the same direction. Cryptopolitan's analysis points out that during the same period Harvard reduced its holdings, Abu Dhabi's sovereign wealth fund, Mubadala, conversely increased its holdings of IBIT to approximately $566 million, marking its seventh consecutive quarter of increased holdings. This divergence itself is telling: the market simultaneously holds diametrically opposed judgments on the same asset, and both judgments originate from "smart money."
Triple Macroeconomic Pressures: Why Are Institutions Withdrawing Now?
The narrative of capital outflow cannot be separated from the macro context.
Inflation and Interest Rate Expectations . FXStreet's analysis shows that the US CPI rose 3.8% year-on-year, higher than market expectations; meanwhile, the 10-year US Treasury yield continued to climb, and the market began pricing in the possibility of an interest rate hike before the end of the year. The high-interest-rate environment has compressed the valuation space of risky assets, with Bitcoin, as a "high-beta asset," bearing the brunt.
Technical resistance failed to be broken . After touching $79,052 on May 16, Bitcoin failed to break through the 200-day moving average (approximately $82,000). K33 Research believes this correction is more related to broader macroeconomic headwinds than a structural bear market, but weakening negative funding rates and leverage conditions indicate waning market momentum. Market maker Windemute warns that once Bitcoin falls below $75,000, the next target could be $70,000.
Regulatory uncertainty . Investing.com points out that the SEC's delay in approving the "innovation exemption" for tokenized stocks erased recent market expectations for regulation and triggered a loss of approximately $33.8 billion in Bitcoin's market capitalization. The U.S. Senate Banking Committee advanced the CLARITY bill by a vote of 15 to 9, classifying Bitcoin, Ethereum, Solana, and XRP as digital goods, but the market reaction was divided.
$74,000: Defense or Trap?
In terms of price, the $74,000 to $77,000 range is currently considered a key support level by many institutions.
Investing.com's technical analysis indicates that if Bitcoin breaks below $76,000, the next support level is $74,000; if that level is breached, $70,000 will become the next major test target. IG International's analysis defines the $73,757 to $74,441 range as a key area between historical highs and previous lows.
However, some analysts hold the opposite view. COINOTAG, citing on-chain sentiment analysis , argues that ETF redemptions often reflect pessimistic expectations among retail investors rather than a structural withdrawal by institutions—historically, prolonged ETF redemption periods have often been followed by opportunities for patient holders to accumulate positions. This logic presupposes that the macroeconomic environment stabilizes before bond yields further stifle risk assets.
The situation is even worse for the Ethereum ETF.
This round of outflows is not just a story about Bitcoin.
Data from The Block shows that nine Ethereum ETFs recorded net outflows for 10 consecutive trading days during the same period, marking the longest outflow period since March 2025, with a total outflow of approximately $216 million in a single week. BlackRock's Ethereum-related product, ETHA, has seen its net assets fall to the critical point where it is only $223 million away from accumulating net inflows.
For investors holding or following ETH assets, the structural weakness of Ethereum ETFs warrants independent assessment. View real-time Ethereum market depth and fund flows on MEXC to stay informed about market trends .
Exclusive insights from the MEXC Crypto Pulse research team.
This concentrated outflow from Bitcoin ETFs represents the most direct stress test of the "institutional narrative" since 2024. Our research team has the following conclusions:
This is not a collapse of institutional faith, but a reset of risk parameters. The $2.26 billion outflow sounds alarming, but it needs to be compared to a cumulative net inflow of $57.1 billion. Mubadala's simultaneous withdrawal and increase in holdings at Harvard demonstrates that the same asset class yields completely different conclusions in different institutions' risk models—this is itself a sign of market maturity, not a crisis signal.
Whether Bitcoin holds or falls within the $74,000 to $77,000 range will determine the narrative direction in the coming weeks. If Bitcoin can stabilize in this range, and given that the total AUM of ETFs remains at a high level, the foundation for the next rebound has not disappeared. If it breaks below this level, the $70,000 liquidity cluster will face a real test, at which point there will be significant repricing behavior at the institutional level.
The core macroeconomic variable remains the Federal Reserve. Current inflation data has led to discussions about a possible rate hike at the end of the year, which is the fundamental reason for Bitcoin's downward pressure beyond technical factors. If inflation data in June or July shows a substantial decline, ETF fund flows could quickly reverse.
The structural value of ETF products themselves remains unchanged. Harvard's reduction in holdings reflects more of an internal leadership transition and adjustment of its risk model than a fundamental denial of Bitcoin's long-term value. For investors intending to invest in Bitcoin, the current range actually offers a more cost-effective entry point than the all-time high in February.
Frequently Asked Questions (FAQ)
Q1: Does the outflow from Bitcoin spot ETFs mean that institutions have abandoned Bitcoin?
Not entirely. The $2.26 billion outflow is still a partial pullback relative to the cumulative net inflow of $57.1 billion. The simultaneous reduction in holdings by institutions like Harvard and the increase in holdings by institutions like Mubadala indicates that there are disagreements within institutions regarding their assessment of Bitcoin, rather than a unanimous bearish view.
Q2: What are the main reasons for the recent drop in Bitcoin prices?
The core drivers stemmed from the macro environment: higher-than-expected US CPI, rising 10-year US Treasury yields, and the market repricing the likelihood of a Fed rate hike all contributed to suppressing risk assets. ETF outflows and price declines created a mutually reinforcing negative cycle, accelerating the decline.
Q3: Is $74,000 a strong support level?
Analysts from multiple institutions have defined the $74,000 to $77,000 range as a key area. A break below this range could trigger a wider range of stop-loss orders, pushing the price towards $70,000. However, on-chain data shows that long-term holders have not yet seen a large-scale distribution of their holdings, providing some support at the bottom.
Q4: Is the situation with the Ethereum ETF worse than with Bitcoin?
In terms of the duration of outflows, yes. The Ethereum ETF recorded net outflows for 10 consecutive trading days, nearly twice the number of consecutive outflow days for the Bitcoin ETF during the same period. Harvard's complete liquidation of its Ethereum ETF position also puts ETH under greater institutional confidence pressure than BTC.
Q5: How should ordinary investors respond now?
High market volatility presents a crucial window for systematic portfolio allocation and position management, rather than a time for blindly buy the dips or panic selling. It is recommended to track ETF fund flows, on-chain holdings distribution, and macroeconomic indicators using MEXC 's real-time data tools, and make decisions only when supported by sufficient information. This article does not constitute any investment advice.
Disclaimer
This article is for informational purposes only and does not constitute any investment advice, financial advice, or trading guidance. The cryptocurrency market is highly volatile, and investing involves significant risks, including the possibility of losing principal. Readers should conduct their own due diligence and consult a professional financial advisor before making any investment decisions. The MEXC Crypto Pulse team assumes no liability for any losses incurred as a result of reliance on the content of this article.
