According to the source, the provided post attributes Sept. 15 net creations to a competing crypto media outlet we cannot cite. Please supply a primary dataset confirming US spot BTC and ETH ETF net flows for 2025-09-15 (e.g., issuer websites, Farside Investors, SoSoValue, Bloomberg terminal data) so we can deliver a trading-focused summary with verified figures, cumulative flow context, and price impact analysis. Source required: primary issuer or recognized data aggregator.

According to @rovercrc, ETH supply is being absorbed by ETFs faster than Bitcoin, signaling capital rotation into ETH (source: @rovercrc on X, Aug 20, 2025). For trading, monitor ETH/BTC relative strength and compare daily ETH ETF net creations versus BTC ETF flows to validate or fade the rotation narrative (source: @rovercrc on X, Aug 20, 2025). The post frames this as capital rotating toward ETH, implying near-term focus on ETH spot supply, price discovery, and spreads versus BTC among traders evaluating momentum and risk (source: @rovercrc on X, Aug 20, 2025).