U.S. spot Bitcoin ETFs logged nine consecutive trading days of net outflows as of May 29, 2026 — the longest withdrawal run since the products listed in January 2024 — pulling roughly $2.8 billion from the funds and surpassing every prior period of sustained selling pressure in the ETF era, according to SoSoValue data reported by CoinDesk.

The streak eclipses two previous records: an eight-day run in late August through early September 2024 that cost funds $1.2 billion, and another eight-day run in February 2025 that erased $3.3 billion. Nine straight sessions without a net positive day is now the benchmark.

This week alone, investors pulled approximately $1.3 billion, extending what is now three consecutive weeks of net outflows. Monthly withdrawals stand at roughly $2.3 billion. The sustained pace of redemptions has reshaped the narrative around a product class that attracted tens of billions within its first months of trading.

The IBIT dark-pool trade

The outflow streak's most striking episode came on May 27, 2026. A single investor dumped $1.289 billion of BlackRock's iShares Bitcoin Trust — the ticker IBIT, the world's largest Bitcoin ETF — in a single dark-pool transaction at 10:30 a.m. ET.

Dark-pool trades are privately negotiated, allowing large market participants to execute at scale without immediately moving the public market. Alex Thorn, head of research at Galaxy, flagged the transaction on X, calling it the biggest of its kind he had ever seen.

The trade did not represent the full day's IBIT outflow; net redemptions for IBIT on May 27 landed at $192.44 million, per SoSoValue, as buyers absorbed some of the volume. But the gross size of the single block made it the largest single-day outflow event since IBIT's launch. Total net outflows across all eleven spot Bitcoin ETFs reached $334 million that day.

Dark-pool transactions do not disclose the seller's identity or motivation. The scale signals that at least one large institution reduced Bitcoin exposure in a deliberate, single-session move. Whether that represents a reallocation, a hedge unwind, or something else is not visible from the trade record alone.

Bitcoin underperforms as equities approach records

The outflow streak has unfolded against a specific macro backdrop. Bitcoin slid from approximately $80,000 to approximately $73,000 over the nine-session period — a decline of roughly 9%. That move would ordinarily draw attention on its own. What makes it notable is what happened simultaneously elsewhere.

The S&P 500 and Nasdaq have continued to advance toward all-time highs over the same window, driven largely by AI-infrastructure spending enthusiasm and strength in semiconductor and memory-chip stocks. Capital appears to be rotating toward equities with direct exposure to AI buildout rather than toward Bitcoin, which lacks that structural tie to the theme dominating institutional attention in 2026.

Bitcoin has underperformed several of the market's best-performing assets since the start of the year. The ETF outflow data reflects that relative positioning: when other asset classes are generating stronger returns, risk-adjusted portfolio managers reduce the asset that is not keeping pace.

Historical pattern: outflow troughs near turning points

Sustained outflow streaks have precedent as precursors to local bottoms, though the relationship is statistical rather than causal.

Glassnode data shows that the 14-day moving average of Bitcoin ETF flows tends to trough near significant turning points. Two recent examples: in early February 2026, when Bitcoin briefly touched the $60,000 range, the ETF flow MA troughed as redemptions peaked before the fund complex stabilized. In November 2025, ETF outflows accelerated around Bitcoin's post-all-time-high pullback and local low near $85,000, with the MA again marking the trough.

The pattern does not predict timing. A 14-day MA trough near past lows is a data observation — it says what has historically co-occurred, not what must happen next. A new record outflow streak beginning from $73,000 could extend to eight or twelve more days and end at a lower price. The pattern is worth noting because it has recurred; it is not a signal to frame as a call.

What it does indicate is that the current streak, at nine days and $2.8 billion, is now inside the range of historical episodes that preceded stabilization. Whether this episode follows that template depends on factors the flow data does not capture.

Context: nine days is the new floor

Before this streak, the record was eight days — set twice. The first instance, in August and September 2024, pulled $1.2 billion. The second, in February 2025, pulled $3.3 billion. Both resolved without extending to nine. The current streak exceeded both before the nine-day mark closed.

The total extracted — $2.8 billion over the streak, $2.3 billion over the past month — does not threaten the product class structurally; the eleven U.S. spot Bitcoin ETFs collectively hold tens of billions in assets. But the record duration is the institutional story. When the longest holding pattern of continuous net selling since launch occurs, it is a data point about investor appetite at current prices, not a temporary glitch.

SoSoValue tracks daily net flow data across the full ETF complex. CoinDesk reported the nine-day milestone on May 29, 2026, at 10:38 a.m. ET and updated coverage at 11:06 a.m. the same day as new data confirmed the streak extended.