Bitcoin and Ethereum ETF Inflows: What Lies Beneath the Surface

Recent headlines have touted three straight weeks of inflows for Bitcoin and Ethereum ETFs as unambiguous good news. However, a closer look at the numbers reveals a more complicated picture.

In August alone, spot Bitcoin ETFs pulled in $3.52 billion, their best month since September 2025. Meanwhile, Ethereum ETFs brought in $1.85 billion, also their best month since August 2025.

Despite this recent strength, however, spot Bitcoin ETFs remain roughly $1 billion net negative for the year. This means that three good weeks are a real signal of improvement, but they haven't come close to erasing the outflow wave that dominated the earlier part of 2026.