Spot Bitcoin ETFs lost $635M on May 13, the largest outflow since January 29.
Solana ETFs logged zero outflow days in May, drawing $90.83 million so far this month.
21Shares’ new HYPE ETF launched May 12, posting positive flows in two sessions.
Spot Bitcoin (BTC) exchange-traded funds (ETFs) saw $635.23 million in outflows on May 13. That was the largest single-day outflow since January 29.

According to SoSoValue data, Bitcoin ETFs have recorded two consecutive days of outflows this week, threatening to end a six-week streak of positive weekly inflows. For now, weekly flows for this period sit at negative $841.19 million.

BTC ETF Inflow Streak Snaps
The previous six weeks brought roughly $3.4 billion into spot Bitcoin products, marking the longest positive streak since July 2025.
Moreover, April delivered Bitcoin funds their strongest month of 2026 at $1.97 billion. BlackRock’s iShares Bitcoin Trust drove most of that activity.

The inflow momentum continued into early May, with Bitcoin ETFs pulling in $1.68 billion between May 1 and May 6, 2026. However, the funds then saw four days of outflows, broken only by a modest $27.29 million inflow on May 11.

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Ethereum (ETH) funds have also seen a slowdown in demand, recording three consecutive days of outflows.

Solana ETFs Buck the Trend
Despite the broader drop in institutional interest, Solana stands out as a notable performer. Solana ETFs have not posted a single outflow day in May, drawing $90.83 million across eight positive sessions and one flat day.

In comparison, XRP (XRP) ETFs have logged three days of zero flows in May. Dogecoin (DOGE) ETFs recorded only three inflow days with modest sums, while Chainlink (LINK) products posted four. That puts Solana at the head of the altcoin ETF pack this month.

Beyond SOL, 21Shares’ Hyperliquid (HYPE) ETF has maintained its positive streak since its May 12 debut, drawing $2.52 million across its first two sessions.