Bitcoin ETFs saw a net outflow of 2,015 BTC worth $126 million on Aug. 14, while Ethereum ETFs posted a net outflow of 277 ETH worth $517,100. Over the past seven days, Bitcoin ETF net outflows totaled 3,890 BTC worth $243 million, whereas Ethereum ETFs recorded net inflows of 22,900 ETH worth $42.74 million, according to Lookonchain. ETF flow data is closely watched by crypto markets because it offers a gauge of institutional demand and whether capital is rotating between Bitcoin and Ethereum investment products.