On December 8, Bitcoin and Ethereum spot ETFs experienced contrasting flows. Bitcoin ETFs recorded a net inflow of 319 BTC, with significant contributions from ARK's ARKB ETF, which added 478 BTC, and Fidelity's FBTC ETF, which gained 305 BTC. However, BlackRock's IBIT ETF saw an outflow of 363 BTC. In contrast, Ethereum ETFs faced a substantial net outflow of 41,601 ETH. Fidelity's FETH ETF managed to attract 10,575 ETH, and Bitwise's ETHW ETF added 1,466 ETH. Despite these inflows, BlackRock's ETHA ETF experienced a significant outflow of 24,791 ETH, contributing to the overall negative balance for Ethereum.