Spot Bitcoin ETFs saw $667.4 million in inflows on May 19, the second-largest single-day inflow this month, marking a four-day streak of net positive flows.
The surge was led by BlackRock’s IBIT with $305.9 million, followed by Fidelity’s FBTC with $199.1 million and Ark’s ARKB with $155.3 million in inflows. Monday’s influx followed steady buying across the previous four trading sessions, bringing the cumulative inflows from May 15 to May 19 to just over $1.25 billion.
May 15 saw $114.9 million in net inflows, a recovery from the sharp $91.4 million outflow on May 13. That decline had followed a period of stagnation and outflows earlier in the month.
However, by May 14, investor appetite had clearly returned, with $319.5 million entering ETFs, led again by IBIT and FBTC. May 16 added another $260.0 million, showing continuity in buying pressure that persisted through the weekend and into Monday.
Between May 15 and May 19, Bitcoin’s price climbed from $103,786 to $105,616, peaking at $106,473 on May 18. The rally gained momentum over the weekend, suggesting ETF investors were front-running or following spot market strength rather than lagging behind it.
Despite a modest pullback on May 19, the price held above $105,000, a level last tested in March, reinforcing the view that capital allocation into ETFs is closely tied to key price thresholds being reclaimed or defended.
Compared to the earlier half of May, when May 6 saw a net outflow of $85.7 million and May 13 marked the steepest withdrawal, the second half has shown a consistent reversal.
With no outflows from Grayscale’s GBTC on May 19 and multiple issuers posting strong activity, the ETF market appears to have stabilized, tracking Bitcoin’s push back above $100,000.
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