Bitcoin, Ether ETFs Post Strongest Inflows in Months as Crypto Rally Accelerates

US spot Bitcoin ETFs pulled in $517 million on August 19, marking their biggest daily inflow since early May, while Ether ETFs attracted $189 million, their strongest showing since October 2025, according to SoSoValue data. These flows aligned directly with a sharp market rally that pushed bitcoin above $69,000 and sent ether up 18% to around $2,250.

Months of Building Demand Finally Break Out

The surge validates a trend that had been quietly forming throughout the summer, as bitcoin remained stuck below $64,000 for months while ETF flows gradually turned positive. Analysts view this as the breakout that steady inflow growth had been signaling. XRP and Solana-linked funds also saw modest inflows, while Hyperliquid’s product was the only notable outlier, posting a small outflow of about $2 million.

Short Sellers Hit Hard by the Rally

The rally proved costly for bearish traders, wiping out a record $2.7 billion in short positions as bitcoin approached $70,000. This kind of rapid, liquidation-driven price acceleration typically occurs when a market breaks out of a prolonged trading range while leveraged positions are caught on the wrong side.

Whether Inflows Continue Remains the Key Question

A single day of strong ETF buying confirms renewed interest but doesn’t guarantee it will last, especially given bitcoin’s history of false breakouts from similar ranges. If inflows remain elevated for a second and third consecutive day, it would signal the kind of sustained institutional demand that’s been largely absent since spring. A quick reversal, on the other hand, could bring the $64,000 level back into focus as a key support zone.