
The US spot cryptocurrency ETF market showed a clear divergence on Thursday, December 18, 2025, as Bitcoin (CRYPTO:BTC) products attracted strong institutional inflows while Ethereum (CRYPTO:ETH) funds extended a deepening run of losses.
Market data indicated investors increasingly view Bitcoin and Ethereum as separate risk assets rather than a single correlated trade.
Bitcoin’s underlying price fell roughly 4.4% on the day, sliding towards the $84,000 level amid broader market weakness.
Despite the decline, regulated Bitcoin ETFs absorbed significant capital, acting as a stabilising force as retail sentiment softened.
The US spot Bitcoin ETF market rebounded after suffering more than $635 million in net outflows over the previous 48 hours.
Fidelity Wise Origin Bitcoin Fund recorded $391 million in net inflows, marking the strongest single-day performance among issuers.
The inflows lifted Fidelity’s total Bitcoin ETF assets towards $12.4 billion, reinforcing its appeal to large institutional allocators.