Key Takeaways
- • Bitcoin spot ETFs experienced $648.64 million in outflows on Monday, May 18, 2026, with BlackRock's IBIT accounting for $448 million of the total, followed by ARK Invest/21Shares ($110 million) and Fidelity ($63 million).
- • Bitcoin declined 6.7% from $81,700 on Thursday to a weekly low of $76,201, driven by a combination of U.S. inflation data triggering Federal Reserve rate hike expectations and geopolitical tensions between the U.S. and Iran.
- • Long-term Bitcoin holders have accumulated positions over recent months, providing a structural floor that limits further downside despite the outflows and price weakness.
- • Bitcoin funding rates flipped positive following a multi-month negative streak, signaling a potential shift in market sentiment despite the concurrent 6.7% price decline.
- • ETF outflows represent a continuation of broader de-risking by institutional fund managers, compounding weakness from the prior week's $1 billion in Bitcoin ETF outflows.
Summary
Spot Bitcoin ETFs shed $648.64 million on Monday, May 18, 2026, extending a period of significant institutional redemptions. BlackRock's iShares Bitcoin Trust (IBIT) led the outflow activity with $448 million in redemptions, while ARK Invest and 21Shares' joint offering accounted for $110 million and Fidelity contributed $63 million. This single-day decline follows approximately $1 billion in outflows during the preceding week, signaling sustained institutional pressure on Bitcoin exposure.
The outflows coincided with a sharp 6.7% decline in Bitcoin's price, which fell from $81,700 on Thursday to a weekly low of $76,201. Bitcoin was trading near $76,680 at the time of reporting, down 0.7% over the preceding 24 hours. Market analysts attributed the weakness to two primary catalysts: last week's U.S. inflation data, which significantly shifted expectations around Federal Reserve policy toward rate hikes later in 2026, and escalating geopolitical tensions between the United States and Iran, including commentary from President Donald Trump about a potential military response.
According to Agne Linge, Advisor to the Board at blockchain financial infrastructure firm Wefi, the outflows "reflect the de-risking strategy that was conducted by fund managers in light of geopolitical events." Illia Otychenko, lead analyst at CEX.IO, provided additional context, noting that outflows were "driven by last week's U.S. inflation data, which significantly shifted market expectations around Federal Reserve policy, with rising expectations of a rate hike this year." Market pricing indicates only a 2% probability of a 25 basis point rate cut in June and a 4% probability of deeper cuts before July.
Despite the price weakness and outflows, long-term Bitcoin holders have accumulated substantial positions over recent months, effectively constraining downside risk. Additionally, Bitcoin funding rates reversed to positive territory after a prolonged negative streak, suggesting underlying demand may be stabilizing despite the visible outflow activity and price pressure. This technical development suggests potential resilience in demand structures beneath the surface-level fund flows.
The outflows coincided with a sharp 6.7% decline in Bitcoin's price, which fell from $81,700 on Thursday to a weekly low of $76,201. Bitcoin was trading near $76,680 at the time of reporting, down 0.7% over the preceding 24 hours. Market analysts attributed the weakness to two primary catalysts: last week's U.S. inflation data, which significantly shifted expectations around Federal Reserve policy toward rate hikes later in 2026, and escalating geopolitical tensions between the United States and Iran, including commentary from President Donald Trump about a potential military response.
According to Agne Linge, Advisor to the Board at blockchain financial infrastructure firm Wefi, the outflows "reflect the de-risking strategy that was conducted by fund managers in light of geopolitical events." Illia Otychenko, lead analyst at CEX.IO, provided additional context, noting that outflows were "driven by last week's U.S. inflation data, which significantly shifted market expectations around Federal Reserve policy, with rising expectations of a rate hike this year." Market pricing indicates only a 2% probability of a 25 basis point rate cut in June and a 4% probability of deeper cuts before July.
Despite the price weakness and outflows, long-term Bitcoin holders have accumulated substantial positions over recent months, effectively constraining downside risk. Additionally, Bitcoin funding rates reversed to positive territory after a prolonged negative streak, suggesting underlying demand may be stabilizing despite the visible outflow activity and price pressure. This technical development suggests potential resilience in demand structures beneath the surface-level fund flows.
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