US Spot Bitcoin (BTC) ETFs Draw Record $2.39B Weekly Inflows

Record Week for Spot ETFs

U.S. spot Bitcoin exchange-traded funds booked $2.39 billion in net inflows this week — the largest weekly total of 2026 — but the daily tape shows the buying thinning session by session. Monday, September 21, alone contributed $998.95 million, and every following day stepped lower: Friday closed at $134.47 million, roughly 87% beneath the week's opening figure, even as the streak stretched to a seventh straight day of net creations. Spot ETFs hold real BTC on shareholders' behalf, so this flow line works as a direct demand gauge, and the setup sits at the center of our Bitcoin market coverage. Monday's burst followed a 6.7% jump in Bitcoin on its heaviest volume since August 21, with about $262 million in bearish bets forcibly closed within an hour — a liquidation squeeze that compels shorts to buy back. Funds had returned after the Federal Reserve's September 16 decision moved rates to a 3.75%–4% range. The tone shifted on September 23: an S&P Global business survey printed the fastest U.S. growth since July 2021, the 10-year Treasury yield cleared 5%, and Bitcoin fell below $84,000 within the hour after the earlier rejection at $87,374.

River's Supply-Shock Reading

A Bitcoin financial services firm, River, reads the same tape as a supply story rather than a demand one. Its September 23 report argues price has climbed about 50% this year without a matching rise in real demand: 81% of supply — 16.3 million BTC — has not moved in at least six months, and exchange trading volume sits roughly 30% below where the year began. ETFs themselves had bought only about 18,000 BTC in September as of that report, a pace below their monthly average since launch. “For once, there is a real supply shock in bitcoin,” the firm's team wrote in a September 23 post; in River's framing, fewer coins changing hands lifts price more than fresh buyers would. On-chain data carries the demand-side rebuttal: about $2.52 billion in net BTC left major exchanges between September 22 and 24 — coins that typically migrate into long-term HODL storage. Wallets holding 100 to 1,000 BTC have accumulated 113,950 BTC since July 15, and long-term holders have added more than 3 million BTC since 2020 — steady whale accumulation on both counts.

wrote in a September 23 posthttps://x.com/River/status/2102785588437086680?ref_src=twsrc%5Etfw

Altcoin ETFs Broaden the Flow

The demand picture extends past Bitcoin. Across U.S. spot ETFs for Bitcoin, Ethereum, Solana, XRP and Zcash, net inflows reached roughly $3.04 billion over the four sessions from September 21 to 24, with Bitcoin funds absorbing $2.25 billion of that total. Ethereum products took $602.94 million — more than three-quarters of everything that went to the four non-BTC assets — while Solana funds drew $101.55 million, XRP $52.95 million and the newly launched Zcash ETF $35.17 million. As of September 24, the twelve Bitcoin ETFs carried $108.42 billion in total assets, with cumulative net inflows through that date measured at $57.43 billion. Bitcoin itself climbed to $87,392 on September 21 before struggling to hold above $85,000 — the same shelf where price held near $84K through recent geopolitical headlines. Exchange commentary from Bitfinex notes that ETF demand and corporate balance-sheet buying have appeared together for the first time this year, and the exchange estimates the average ETF investor's cost basis near $86,000 — making continued inflows the swing factor for whether the uptrend holds. Readers tracking the market in real time can follow live spot and futures prices on Gate.

$87,333 Resistance in Focus

COINOTAG's proprietary 42-indicator composite S/R scoring engine rates the $87,333 resistance at 85/100, driven by the confluence of R3, the Bollinger upper band and the Donchian upper channel. The first support beneath spot — $84,021 — scores 60/100 as a flipped resistance-turned-support with MACD cross confirmation, while the stronger floor sits at $80,172, rated 78/100 by LVN, SMA 20 and Ichimoku Kijun confluence. Derivatives lean long but unhinged: funding at 0.0017%, open interest at $15.96 billion and a 1.41 long/short account ratio (58.4% long) sit alongside a Fear & Greed reading of 74 (Greed). Our bullish case needs the $84,021 shelf to hold for a retest of $87,333; a daily close below $80,172 invalidates it. As we leave the two series, flow is decelerating while price holds the flip level — both pointing the same cooling-but-constructive way.