From December 15 to 19, 2025, the Bitcoin and Ethereum spot ETF market experienced a significant decline in investment activity. According to SoSoValue, the total outflow from these products exceeded $1.1 billion, representing one of the largest negative outflows in recent weeks.
The spot Bitcoin ETF sector experienced the greatest pressure. During the reporting period, investors withdrew $497.05 million from these funds. Negative trends were recorded across several products. IBIT led the way in terms of outflow, with $240.32 million withdrawn. BITB ($115.21 million) and ARKB ($100.59 million) also suffered significant losses. More moderate outflows were observed in HODL ($39.21 million), GBTC ($27.51 million), and BTC ($7.37 million).
Meanwhile, several Bitcoin ETFs showed no capital movement. BTCO, EZBC, BRRR, BTCW, and DEFI saw no inflows or outflows over the week. FBTC was the exception, attracting $33.15 million in new investments despite the overall negative backdrop.
The outflow from Ethereum-based spot ETFs was even more pronounced. Total losses in this segment amounted to $643.97 million. The largest portion of capital was withdrawn from BlackRock's ETHA, at $558.15 million. Significant outflows also occurred from Grayscale's ETHE ($32.36 million), Grayscale's ETH ($17.29 million), Fidelity's FETH ($16.72 million), Bitwise's ETHW ($13.01 million), and VanEck's ETHV ($6.43 million). Meanwhile, Franklin Templeton's EZET, Invesco's QETH, and 21Shares' TETH funds ended the week with no investment inflows.
Amid weakening interest in leading cryptocurrencies, investors showed moderate interest in altcoin-focused products. Specifically, the XRP ETF attracted $82.04 million, the Solana ETF $66.55 million, and the LINK ETF $3.62 million. Meanwhile, the DOGE ETF, Litecoin ETF, and HBAR ETF saw no capital inflows.
The situation in the Hong Kong market is particularly noteworthy, with an outflow of 8.98 BTC over the same period, while Solana-focused funds saw an inflow of 1,550 SOL.
It's worth noting that the situation was reversed the week before: then, the combined inflow into Bitcoin and Ethereum ETFs exceeded $490 million, highlighting the high volatility of institutional investor interest in cryptocurrency exchange-traded products.