US-listed Bitcoin and Ethereum ETFs attracted a combined $2.6 billion in the seven days ended August 21, their strongest week since October 2025. Bitcoin products accounted for $1.92 billion, while Ethereum funds drew $697.18 million, reversing a combined $391.96 million outflow the previous week. Bitcoin ETFs posted five straight days of net inflows from August 17 through August 21, including $606 million on August 20, while weekly trading volume tripled to $22.15 billion. Despite the rebound, cumulative Bitcoin ETF inflows remain below their October 2025 peak, and both Bitcoin and Ethereum products are on track for their first losing years since launch. Combined assets rose by about $23 billion, far exceeding new creations, with gains in the underlying holdings contributing 22.9% for Bitcoin and 29.2% for Ethereum. Other US-listed altcoin ETFs also recorded inflows, led by XRP, Solana, Chainlink, Hyperliquid and Dogecoin products.