主要洞察：
- 比特币 ETF inflows reached $433 million as institutional demand returned.
- Fidelity’s FBTC led Sept. 18 inflows with $310.7 million.
- BTC price reclaimed $81,000 while $83,000 remained key 阻力.
美国现货 比特币 交易所-traded funds recorded $433.03 million in net inflows on Sept. 18. Fidelity’s FBTC led the session with $310.72 million, while BlackRock’s IBIT drew $108.44 million.
根据 比特币 ETF rebound came as BTC price returned above $81,000 on Sept. 19. 比特币 now trades near a $83,000-$86,000 阻力 band identified by Glassnode through cost-basis and derivatives data.
Bitcoin ETF Flows Reverse Midweek Outflows
Farside Investors data showed spot 比特币 funds added $433.0 million on Sept. 18. Fidelity’s FBTC drew $310.7 million, the largest inflow among listed products. BlackRock’s IBIT followed with $108.4 million, while Bitwise’s BITB added $9.7 million.
ARK Invest’s ARKB received $1.9 million, while VanEck’s HODL（持币） added $2.3 million. No listed fund recorded an outflow during the session. The result extended the positive streak to two trading days.
However, the broader weekly picture remained mixed. The funds lost $450.4 million on Sept. 15 and $295.9 million the following day. Those sessions produced combined withdrawals of $746.3 million before demand returned. Across Sept. 17 and Sept. 18, the funds recovered $592.5 million in net inflows. That still left part of the earlier midweek withdrawals unrecovered.
Farside’s running table placed cumulative net inflows at $55.23 billion through Sept. 18. The data showed institutional allocations had recovered from the week’s weakest sessions, but flows remained uneven.
BlackRock’s official fund page listed IBIT with $59.87 billion in net assets on Sept. 17. Fidelity states that FBTC holds Bitcoin directly and passively tracks the asset’s performance. Both products charge a stated fee of 0.25%.
BTC Price Reclaims $81K After Friday Rally
CoinGlass data placed Bitcoin price near $81,174 on Sept. 19, up about 5% over 24 hours. The platform reported roughly $81.51 billion in futures 量 and $56.60 billion in open interest.
TradingView separately showed Bitcoin around $81,177 during the same session. That kept BTC price above the $80,000 area after Friday’s advance. The move also brought Bitcoin closer to 阻力 tracked by on-chain market data.
Binance market data showed Bitcoin crossed $81,000 on Sept. 18. The 交易所 recorded a price near $81,010 when the threshold was broken. That advance followed trading below $77,000 earlier in the week.
The recovery also moved the price above recent institutional cost-basis markers. Glassnode’s earlier research placed a corporate treasury cost basis near $80,500. Its spot-fund break-even estimate remained closer to $86,000.
Bitcoin ETF Demand Meets $83K-$86K Supply
Glassnode research identified $83,000 to $86,000 as Bitcoin’s main overhead supply band. Its Sept. 9 report estimated investors acquired roughly 1.07 million BTC within that range. Long-term holders controlled most of that supply, according to the research firm.
The same report showed short-liquidation levels concentrated between $82,000 and $86,000. Glassnode said that the shelf had expanded 21% since the Aug. 19 short squeeze. Those levels placed the current rally near an established derivatives and cost-basis barrier.
An Aug. 26 Glassnode report also placed dealer gamma near $82,300. It identified the first self-custody cost-basis shelf at around $80,800. Those measures clustered close to the current BTC price.
Glassnode’s Sept. 16 update placed the True Market Mean near $76,700. Bitcoin has since moved back above that level. The report also identified a heavy options call wall around $85,000.
ETF structure gives those price levels added relevance. Fidelity states that FBTC passively tracks Bitcoin and holds the asset directly. BlackRock states that IBIT seeks to reflect Bitcoin’s price through an 交易所-traded product.
ETF Flows Face Next Week’s Market Test
The latest inflow session showed renewed demand after two heavy withdrawal days. Still, one positive session does not establish a sustained allocation trend. Farside’s daily series has shifted between sizable inflows and outflows throughout September.
Derivatives positioning also increased as Bitcoin approached overhead supply. CoinGlass reported elevated futures activity alongside the price recovery. Higher open interest can amplify volatility when the price reaches concentrated liquidation areas.
The next U.S. trading session falls on Sept. 21. That session will provide the next spot-fund flow reading after Friday’s $433.0 million intake. Traders will watch whether Bitcoin can close above $83,000. Glassnode’s broader resistance band extends to $86,000.
本文仅供参考，不构成财务或投资建议。加密货币投资具有风险，过往业绩不代表未来表现。读者在做出投资决策前应进行自己的研究。
常见问题解答
What were the Bitcoin ETF inflows on Sept. 18?
U.S. spot Bitcoin ETFs recorded $433.03 million in net inflows.
Which fund led the daily inflows?
Fidelity’s FBTC led the session with $310.72 million.
What price level is Bitcoin testing?
Bitcoin is testing a major resistance band between $83,000 and $86,000.
What is the cumulative net inflow for these ETFs?
Cumulative net inflows reached $55.23 billion through Sept. 18.
