The US spot Bitcoin ETF market faced its toughest outflow cycle since late January in May 2026. According to industry data providers, over the six consecutive trading days ending May 22, all 12 US spot Bitcoin ETFs saw a combined net outflow of approximately $1.55 billion. This reduced the year-to-date net inflow to just $536 million, putting the annual positive inflow at risk of turning negative at any moment.
The most concentrated day of outflows was May 18, with about $648 million exiting in a single day—the largest daily outflow recorded in 2026. While the daily outflow slowed somewhat after that, it remained negative through Friday (May 22), with another $105.2 million net outflow that day. From the issuer perspective, BlackRock’s IBIT and Fidelity’s FBTC were the main sources of outflows: IBIT saw $68.9 million in net outflows, while FBTC lost $36.3 million.
Notably, IBIT remains the only major ETF with a positive net inflow in 2026—about $2.7 billion year-to-date. However, this figure pales in comparison to the $25 billion inflow seen in all of 2025. In other words, ETF demand is not only slowing, but the pace of cooling is far faster than expected.
18,000 BTC Net Inflow to Exchanges: Spot Supply Is Quietly Accumulating
As ETF demand waned during this same period, on-chain data revealed another critical signal: Bitcoin is flowing into centralized exchanges at scale. According to Blockbeats and analyst Axel Adler Jr., the net inflow of BTC to exchanges over the past week was about 18,000 coins.
"Net inflow" refers to the difference when more BTC is deposited into exchanges than withdrawn. When large amounts of Bitcoin move from self-custody wallets or cold storage to exchanges, it usually signals that holders are preparing for potential selling—once assets hit exchanges, liquidity and sellability increase significantly. Such on-chain activity is often interpreted by the market as rising selling intent.
Looking at a longer timeframe, daily trading volumes for spot BTC ETFs are also declining. Glassnode data shows daily turnover for spot BTC ETFs has dropped below $20 billion, compared to over $50 billion at the end of 2025. Speculative demand from traditional financial channels is cooling noticeably, further confirming the current lack of demand-side momentum.
How Does the Potential Sell Pressure of 34,000 BTC Form?
By combining these two clues, we get a clearer picture of the supply-side pressure facing the market:
- Net inflow to exchanges of about 18,000 BTC — increasing reserves for potential selling
- Concurrent ETF net outflow of about 16,000 BTC — institutional demand channels are failing, with some BTC previously held via ETFs being redeemed and returning to the circulating market
In total, roughly 34,000 BTC are "approaching" the sell side of the market. Analyst Axel Adler Jr. summed up the issue directly: "This isn’t absorption of supply—it’s an increase in sell pressure."
This 34,000 BTC does not mean "34,000 BTC will definitely be sold immediately." A more accurate framework is: these BTC have left their previous "dormant" or "held" institutional custody structures and are now in a state where selling is more likely. Actual selling depends on whether there is enough demand in the spot market to absorb this supply.
Institutional Risk Appetite Is Cooling: What Are Jane Street and Goldman Sachs Doing?
Even more important than ETF flows are structural changes in institutional behavior.
According to Q1 2026 13F filings, renowned market maker Jane Street slashed its Bitcoin ETF holdings by about 70%, while investment bank Goldman Sachs reduced its Bitcoin ETF positions by about 10%.
Jane Street, one of the world’s largest options market makers, provides a strong signal by significantly reducing its crypto ETF holdings. Goldman Sachs, as a top investment bank, also trimmed its exposure—albeit by a smaller margin—reflecting a broader institutional reassessment of crypto asset risk. These adjustments occurred during a period of rising macro uncertainty, climbing US Treasury yields, and persistent geopolitical tensions, indicating that institutional risk aversion is systematically influencing crypto asset allocation decisions.
A key distinction: BlackRock’s reduction of about 15,000 BTC was mainly driven by ETF client redemptions, not BlackRock itself turning bearish on Bitcoin. BlackRock applied to the SEC for a second tokenized fund during the same period, showing it is still expanding its digital asset business. So, the idea that "institutions are retreating" is too simplistic—a more accurate description is: institutional clients’ macro risk appetite is shrinking, while institutional service providers continue to build out infrastructure.
Short-Term Holders Are Underwater: Sell Pressure Can Self-Reinforce
On-chain data also provides another dimension for analyzing sell pressure dynamics.
The realized price for short-term holders—tracking the average cost basis for investors holding less than 155 days—is currently around $80,217. When the Bitcoin price trades below this threshold, many short-term holders are in an unrealized loss position. They are more motivated to close out and cut losses when the price rebounds near their cost basis, intensifying sell pressure.
Meanwhile, realized losses in the Bitcoin market are rising. Short-term traders have realized losses of about $366 million, while realized gains total about $190 million. The net realized profit is around -$176 million, meaning that recent sellers are, on balance, selling at a loss.
Looking at the Coinbase Premium Gap, US investors are also showing a strong selling bias. The Coinbase Premium Gap has plunged deep into negative territory—one of the strongest bearish signals since February—indicating sustained sell pressure from US investors. For those trying to gauge whether the 34,000 BTC of potential sell pressure will actually materialize, this data provides a logical basis: the current market structure has conditions for "self-reinforcing sell pressure."
Derivatives Markets Aren’t Filling the Demand Gap: Short Covering Drives the Rebound
Recent price rebounds have stirred market sentiment. After dropping below $75,000, Bitcoin quickly bounced back to around $77,800, and some participants may interpret this as a return of demand.
However, derivatives data points to another explanation. The rebound was mainly driven by short covering, not new capital buying. BTC total open interest dropped from about 268,000 BTC to 250,000 BTC before a slight recovery, while funding rates cooled off, indicating that leveraged long positions are less crowded.
Without growth in spot demand, rebounds driven solely by short covering have limited sustainability. As analysts note, for BTC to push further toward $80,000, spot demand and open interest need to grow in tandem to support a more robust rally. Currently, the derivatives market is not providing enough additional demand to absorb the supply accumulating on exchanges.
What Key Variables Should We Watch Next?
Based on this analytical framework, several variables will determine how much of the 34,000 BTC potential sell pressure actually hits the market in the coming weeks:
The first variable is whether ETF flows can reverse. If ETFs return to net inflows over the next few days—perhaps due to marginal improvement in macro conditions—the demand side could rebalance the current supply surplus.
The second variable is whether the trend of net inflows to exchanges can slow or even reverse. If net inflows to exchanges remain positive, even if ETF outflows stop, BTC supply will continue to pile up at the market’s edge. The signal to watch is weekly net inflows moving toward neutral or negative.
The third variable is the battle around short-term holders’ cost basis. $80,217 is not only a technical resistance level but also a psychological anchor for many short-term holders’ decisions. If Bitcoin can hold above this level, the chain of self-reinforcing sell pressure will be broken.
The fourth variable is the overall direction of institutional client behavior. Although Jane Street and Goldman Sachs reduced positions in Q1, their next moves—whether further reductions or renewed exposure—will deeply impact market sentiment and capital flows.
Summary
In May 2026, the US spot Bitcoin ETF market saw six straight days of net outflows totaling about $1.55 billion, compressing the year’s net inflow to a critical $536 million. At the same time, exchanges recorded a net inflow of about 18,000 BTC, signaling a large migration of Bitcoin from custody to trading channels. Together, these factors form a potential sell pressure of about 34,000 BTC—not that all will be sold immediately, but that the supply available for selling has increased significantly.
On a deeper level, systemic cooling of institutional risk appetite is reshaping the market’s capital structure. Jane Street and Goldman Sachs reduced Bitcoin ETF positions in Q1; ETF daily trading volumes fell from over $50 billion at the end of 2025 to less than $20 billion; recent derivatives market rebounds were mainly driven by short covering, not real spot demand. Meanwhile, the average cost threshold for short-term holders above $80,000 means many traders are underwater, and the motivation to sell remains strong.
The next market direction will depend on the dynamic changes in four variables: whether ETF flows can reverse, whether net inflows to exchanges can slow, whether Bitcoin can hold above short-term holders’ cost basis, and whether institutional clients continue to trim crypto exposure. Until these signals show clear changes, the potential sell pressure of 34,000 BTC will remain a key supply-demand variable in the current market environment.
FAQ
Q: Does the potential sell pressure of 34,000 BTC mean prices will definitely fall?
Not necessarily. "Potential sell pressure" means the supply available for sale has increased, but actual selling depends on whether market participants choose to act. If spot demand grows in tandem, or ETFs return to net inflows, the additional supply can be absorbed. This figure reflects "risk exposure," not "certain selling."
Q: Does BlackRock’s large-scale sale of Bitcoin ETFs mean the asset management giant has turned bearish?
Not at all. BlackRock’s BTC sales are mainly driven by client redemptions in its ETF products: when investors redeem IBIT shares, BlackRock must sell the corresponding BTC to settle. BlackRock is also applying for new tokenized funds, showing its digital asset business is still expanding. The more accurate interpretation is: BlackRock’s clients (mainly institutional investors) are reducing positions amid macro uncertainty, not BlackRock itself turning bearish.
Q: What are the main drivers of the 34,000 BTC sell pressure?
Two core sources combine: first, net outflows of about 16,000 BTC from ETFs—representing a temporary breakdown in institutional demand channels; second, net inflow of about 18,000 BTC to exchanges—meaning more BTC is moving to trading platforms, increasing the supply available for sale. Additionally, macro factors (high US Treasury yields, geopolitical tensions) and short-term holders’ underwater status intensify selling motivation.
Q: What is the relationship between the Coinbase Premium Gap being negative and sell pressure?
The Coinbase Premium Gap reflects US institutional investors’ buying and selling activity on Coinbase. Deep negative readings usually mean weak US buying and strong selling. Currently, the indicator is at its lowest since February, moving in sync with Bitcoin’s price weakness, showing US institutional investors have not shown strong buying interest at current price levels.
Q: What conditions does the spot market need to absorb the 34,000 BTC sell pressure?
First, ETFs need to return to sustained net inflows; second, weekly net inflows to exchanges need to turn negative; at the same time, spot buying needs to grow meaningfully, not just rely on price rebounds driven by short covering. If these conditions aren’t met, prices will continue to face persistent supply pressure from exchanges in the absence of strong spot demand.
