ETF Rebound Meets Resistance

Bitcoin trades near $81,566, consolidating just above its 20-day average of $78,454 after a completed daily close that slipped fractionally. Institutional demand is returning, but Bitcoin has not yet cleared its key resistance zone. That gap between fresh capital and confirmed price strength is what makes the current session worth reading past the headline number.

ETF Inflows Return, Led by Fidelity

• A two-day inflow stretch following two outflow sessions: US spot Bitcoin ETFs recorded outflows of $450.4 million on September 15 and $295.9 million on September 16, before flipping to inflows of $159.5 million on September 17 and $433 million on September 18, with Fidelity's FBTC accounting for $310.7 million of the September 18 total, according to Farside Investors' daily flow tracker. CoinNess and edgeX also reported the September 18 rebound.

• Resilience against an already-priced tightening move: Bitcoin reportedly held above $81,700 in the days following the Federal Reserve's 25-basis-point hike, a move already covered as part of the tightening cycle in the September 17 edition.

On-Chain Profit-Taking Turns Constructive

• SOPR turns positive: Bitcoin's seven-day entity-adjusted Spent Output Profit Ratio reportedly moved above 1.0, per reports citing Glassnode, indicating that coins were being spent at a profit rather than a loss as demand absorbed available selling.

• The resistance zone still holds: The same external reporting identifies $83,000 to $86,000 as the zone the market has failed to clear.

Institutional demand is returning, but Bitcoin has not yet cleared its key resistance zone. A positive SOPR reading supports the idea that current holders are not distressed sellers, but it does not by itself confirm that the range above spot is about to give way.

• Dominance stayed concentrated: BTC represented 73.73% of the combined market capitalization of BTC, ETH, SOL, BNB and XRP, per DefiLlama, a five-asset leadership proxy showing that capital has not rotated meaningfully into the rest of the basket.

Coinjuice Lens: Market Structure

This sits inside the theme Coinjuice has tracked since the September 17 edition, where a fully priced Federal Reserve hike widened the real policy rate without moving Bitcoin much on the day. The September 18 edition then noted ETF flows swinging from a multi-session outflow streak into a rebound. The September 18 inflow figure covered here extends that same rebound rather than reversing or repeating it, and the newly constructive SOPR reading adds an on-chain leg to a recovery that had previously rested on price and flow data alone. Read together across the three editions, the pattern is one of demand returning in stages while the $83,000 to $86,000 zone remains the level that would confirm it.

Today, Coinjuice will publish an academic review examining whether Bitcoin is becoming less sensitive to Federal Reserve decisions, and why an expected rate change can produce little immediate reaction even when monetary policy still matters.

News Behind Today's Read

• SOPR Turns Bullish as BTC Holds $81K, Eyes $83K–$86K Short Squeeze (Brave New Coin). Source for the entity-adjusted SOPR reading moving above 1.0 and the $83,000 to $86,000 zone flagged as the next test.

• ChainCatcher coverage of the SOPR reading (ChainCatcher). Secondary corroboration for the same SOPR figure, cited alongside Brave New Coin rather than as an independent data point.

• Farside Investors — daily US spot Bitcoin ETF flow tracker. Source for the September 15–18 flow figures and Fidelity's FBTC share of the September 18 total.

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Market Snapshot

This article was developed with the support of artificial intelligence tools as part of Coinjuice's editorial process and reviewed by our editorial team before publication.

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