According to @EricBalchunas, spot Bitcoin and Ether ETFs recorded about 40 billion USD in trading volume this week, marking their biggest week on record and driven by strong participation from Ether ETFs (source: Eric Balchunas on X, Aug 15, 2025). The combined turnover is comparable to a Top 5 ETF or a Top 10 individual stock by volume, underscoring exceptional activity in BTC and ETH spot ETF markets (source: Eric Balchunas on X, Aug 15, 2025).