US spot exchange-traded funds tracking ether attracted their biggest single-day inflow on Monday, drawing roughly $1.02 billion, according to market data cited by several fund trackers. The surge eclipsed the previous July record and lifted cumulative net subscriptions for the products to more than $10 billion since their launch earlier this year. BlackRock’s iShares Ethereum Trust led the buying with an estimated $640 million, while Fidelity’s product recorded about $277 million. Aggregate trading volume across the suite of ether ETFs reached $3.1 billion for the day, underscoring growing institutional demand for exposure to the world’s second-largest cryptocurrency. The fresh inflows helped push ether 3.5 percent higher to about $4,430 on Tuesday, its strongest level in nearly four years and within 10 percent of the November 2021 all-time high. Ether outperformed a broader digital-asset market that slipped 1.6 percent, signaling that the renewed fund buying is concentrating investor interest in the token even as other major coins lose ground.