Between September 14 and 18, 2026, crypto ETF inflows and outflows went in totally different directions. According to SoSoValue, US spot Bitcoin ETFs took in a modest $6.21 million. Meanwhile, spot Ethereum ETFs saw a net outflow of $140 million for the week. In sharp contrast, ZEC ETFs grabbed the spotlight among altcoin funds, raking in $98.21 million during the same period.

Fund Flows: BTC in the Green, ETH in the Red

Spot Bitcoin ETFs managed a small but positive inflow of $6.21 million over five trading days. On the flip side, money kept leaving spot Ethereum funds, with net outflows hitting $140 million for the reporting window.

ZEC ETFs Outperform Other Altcoin Funds

ZEC ETFs led the pack among altcoin-based funds. Over the week, they posted a net inflow of $98.21 million, standing out against the weak numbers from Ethereum ETFs.

Market Sentiment at a Glance

The mix of modest Bitcoin ETF inflows, major Ethereum ETF outflows, and strong demand for ZEC ETFs points to a shift in investor interest across the crypto fund space during this stretch. These numbers from SoSoValue highlight investor sentiment for September 14–18, 2026.