According to the source, a claim is circulating that BlackRock’s spot Ethereum ETF purchased 78,920 ETH worth $363.2M on Sept. 15; traders should verify this against BlackRock iShares’ official daily holdings disclosure, SEC EDGAR filings, and NSCC creation basket files before positioning, source: BlackRock iShares; U.S. SEC EDGAR; DTCC/NSCC. If official data confirms a ≥70k ETH net creation on that date, this implies material net inflows that can tighten spot–futures basis; monitor CME front‑month ETH futures basis, perpetual funding rates, and the ETH/BTC spread for confirmation signals, source: CME Group; major derivatives venues’ public funding data. Cross‑check aggregate spot ETH ETF creations/redemptions and shares outstanding across issuers to distinguish rotation from new money, source: issuers’ daily holdings pages; Cboe/Nasdaq listing data.

According to Farside Investors, US Ethereum ETFs recorded total net inflows of 307.2 million dollars on 2025-08-27, source: Farside Investors. ETHA led with 262.6 million, about 85.5 percent of the day’s total, while FETH logged 20.5 million, ETH 15.1 million, ETHE 5.7 million, and ETHV 3.3 million, source: Farside Investors. ETHW, QETH, and EZET posted zero net flow, and CETH was not reported in the dataset shared, source: Farside Investors. Traders tracking primary market activity can note ETHA as the dominant driver of daily net creations within the US Ethereum ETF basket, source: Farside Investors.

According to the source, ETH ETFs posted their largest single-day inflow to date yesterday, signaling a surge in institutional demand for ETH exposure (source: X post dated Aug 12, 2025). The source characterizes this as institutions materially increasing allocations rather than marginal buying, highlighting a step-up in participation intensity (source: X post dated Aug 12, 2025). If these inflows are concentrated in spot or physically backed ETH ETFs, net creations typically require acquiring the underlying ETH, which can translate inflow spikes into buy-side pressure during creation windows (source: U.S. SEC Investor Bulletin: Exchange-Traded Funds, creation/redemption process). Traders can monitor continuation in daily ETF flow prints as a short-term sentiment gauge for ETH momentum and liquidity conditions (source: X post dated Aug 12, 2025; U.S. SEC Investor Bulletin on ETFs).