Spot Bitcoin (BTC) exchange-traded funds (ETFs) added $242.30 million in net inflows on Aug. 27. The gain extended their streak to nine consecutive trading days.
Spot Ethereum (ETH) ETFs matched the pace. The category added $235 million on the same day, marking its own ninth straight inflow session.
Bitcoin And Ether Funds Move In Lockstep
The parallel streaks follow a stretch of heavy institutional buying. BlackRock’s iShares Bitcoin Trust (IBIT) contributed $209 million of a $338 million Bitcoin ETF inflow on Aug. 24. Its Ethereum fund, ETHA, added $90.92 million of that day’s $116 million Ethereum ETF haul.
Bitcoin traded near $80,000 on Thursday, up 2.12% over 24 hours. Ether changed hands near $2,480 over the same period.
Total net assets across spot Bitcoin ETFs stood at $79.16 billion. Trading volume across the category reached $8.23 billion, according to CoinGlass data.
The two categories also posted their biggest combined week since October last week, drawing $2.3 billion between them. That run suggests institutions are building positions across both assets rather than rotating between them.
The current streak traces back to Aug. 17, when both categories began a run that reached four days by Aug. 20. It has continued uninterrupted through Aug. 27.
Smaller crypto funds joined the advance. Spot Solana (SOL) ETFs added $60.91 million, and spot Hyperliquid (HYPE) ETFs drew $24.42 million, both on Aug. 27.
Both smaller funds remain far behind Bitcoin and Ether in scale. The same-day gains suggest institutional demand extends beyond the two largest crypto assets.
Sustained ETF demand can matter beyond the daily headline. Steady inflows reduce available supply on spot exchanges, a dynamic that has historically supported price during past accumulation phases.
Nine straight days of buying across both major categories signals broad, not narrow, institutional appetite. Whether that appetite holds into next week may depend on whether Bitcoin and Ether can extend their recent price gains.