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

Record Week for Spot ETFs

U.S. spot Bitcoin (BTC) 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 (BTC) 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 Bitcoin (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.

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Wrote in a September 23 post.

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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

Fund-level detail behind Friday's close shows where the seventh-session money landed: BlackRock's IBIT absorbed $96.99 million of the $134.47 million in Bitcoin ETF net creations, Fidelity's FBTC added $49.32 million, while Bitwise's BITB bucked the streak with an $11.85 million outflow — leaving roughly $2.98 billion across the seven-day run on $2.26 billion in day trading volume. Corporate balance-sheet buying continued in parallel, with SEC filings showing Strategy added 950 BTC between September 14 and 20 to lift holdings to 846,000, and Strive purchased 1,355 BTC over the same window, raising its stash to 26,355. Among altcoin products, Solana funds' $86.67 million Friday haul nearly matched Ethereum's $86.95 million, led by Bitwise's BSOL at $55.73 million, as XRP notched a 7.48% weekly price gain.

On-chain data now explains why the record inflows have failed to break price: Glassnode identifies a dense band of long-term-holder supply around $84,000–$85,000, with broader on-chain cost basis, liquidation clusters and ETF investor breakeven levels concentrated between $83,000 and $86,000 — meaning ETF buying is currently absorbing existing sellers rather than lifting price, while profit-taking intensity remains well below its 2024–2025 peaks. A further caveat comes from positioning data: CFTC figures show leveraged funds held roughly 39,877 BTC in net short regulated futures positions as of September 8, much of it likely basis trades that buy the ETF and short futures to capture the spread rather than outright bullish bets. Macro pressure adds a second drag, with the 10-year Treasury yield pushing above 5.1% toward levels last seen in 2007. Glassnode's model places the next meaningful on-chain valuation hurdle near $96,700 if the supply zone is cleared.

(as of 18:39 UTC) COINOTAG's proprietary 42-indicator composite S/R scoring engine rates the $95,445.6406 resistance at 45/100, anchored by the 1.272 Fibonacci extension, with $99,648.1987 (41/100, Fibonacci 1.414) and $105,685.6766 (40/100, Fibonacci 1.618) stacked above. Spot trades at $84,741.1200, up 0.82% in 24 hours, just below the first near-term cap at $85,946.2565 (34/100, Keltner upper band and ATR upper band), while the strongest floor sits at $84,084.2951, rated 78/100 by Ichimoku Tenkan, S2, Fibonacci 0.114 and a MACD cross, with an equally strong base at $77,072.00 (73/100, SMA 50, Fibonacci 0.382, a flipped resistance-turned-support and the Supertrend) and $81,433.8327 (52/100, Bollinger middle band, SMA 20, Fibonacci 0.236, EMA 20) in between. Derivatives lean long: funding at 0.0018%, open interest at $15.95 billion and a 1.35 long/short account ratio (57.5% long) pair with a Fear & Greed reading of 70 (Greed) and an RSI of 65.56 in a confirmed uptrend. Our bullish case needs the $84,084.2951 shelf to hold for a push toward $95,445.6406; a daily close below $81,433.8327 weakens it, and below $77,072.00 invalidates it. With price holding above the stacked supports as positioning and sentiment both stay constructive, the read tilts firmly bullish.