Spot Bitcoin and Ethereum exchange-traded funds absorbed $477 million on Thursday, marking the largest single-day combined inflow since October 2025 and extending an unbroken institutional buying streak to nine consecutive trading sessions. Bitcoin products captured $242.30 million while Ethereum vehicles took $235 million, a flow ratio of 1.03:1 that represents the narrowest spread between the two asset classes since spot Ethereum ETFs began trading in July 2024.
The convergence matters because institutional buyers typically treat Bitcoin as primary allocation and Ethereum as satellite exposure. Near-parity suggests either systematic rebalancing across crypto beta or deliberate position-building in Ethereum ahead of network upgrades. BofA's institutional flow desk reported the streak as the longest since the post-halving accumulation window that closed in mid-October, when regulatory uncertainty around staking derivatives briefly chilled inflows. Fidelity's crypto fund lineup, which now spans Bitcoin, Ethereum, and select alt-exposure vehicles, processed roughly $89 million of Thursday's total across retail and RIA channels, per Bloomberg ETF data.
The timing aligns with two structural catalysts. First, Q1 rebalancing windows for family offices and endowments close in the next eleven trading days, and crypto allocations sub-3% of liquid portfolios remain permissible under updated NACUBO guidelines published in December. Second, Ethereum's Dencun upgrade enters final testnet phase next week, with mainnet deployment expected by late February, which historically precedes 60-to-90-day pre-event accumulation among systematic funds. The streak also follows January's spot Bitcoin ETF options launch, which reduced delta-hedging costs for market-neutral funds by roughly 140 basis points, according to Galaxy Digital's trading desk.
What separates this inflow cycle from prior episodes is the absence of retail mania. On-chain wallet creation remains 37% below the November 2024 peak, and Google search interest for "buy Bitcoin" sits at a two-year low. The bid is institutional, patient, and size-driven. Allocators should track two follow-on events: whether February's inflow pace holds above $300 million weekly through month-end, and whether Grayscale's legacy trusts see conversion acceleration as tax-loss harvesting unwinds post-April. The first indicates durable demand; the second confirms structural product migration from closed-end to open-end vehicles.
Ethereum's catch-up bid is the sharper signal. For the first time since August, Ethereum ETF inflows exceeded 48% of combined crypto ETF volume on a five-day trailing basis, up from a 23% average in Q4 2024. That shift either reflects alt-season positioning or sophisticated buyers front-running staking-enabled ETF filings, which the SEC is reviewing under revised crypto custody frameworks. Either way, the parity trade is live.