According to @FarsideUK, GBTC (Grayscale) reported a US$0 million net flow for the day on Sep 18, 2025, based on Farside Investors’ Bitcoin ETF Daily Flow dataset, source: @FarsideUK, source: farside.co.uk/btc. For trading, a zero net flow denotes no net creations or redemptions in GBTC for the session under standard ETF mechanics, signaling neutral primary-market pressure from GBTC on BTC liquidity today, source: @FarsideUK for the flow reading, source: U.S. SEC Investor Bulletin on Exchange-Traded Funds for creation/redemption mechanics. Traders can monitor whether neutrality holds across other U.S. spot Bitcoin ETFs via Farside’s aggregated dashboard updates to gauge flow-driven context, source: farside.co.uk/btc.

According to @FarsideUK, U.S. spot Bitcoin ETFs posted a total net outflow of $51.3 million on 2025-09-17, indicating redemptions exceeded creations that day, source: Farside Investors. IBIT recorded +$149.7 million of inflows, while outflows were led by FBTC at -$116 million, GBTC at -$62.6 million, ARKB at -$32.3 million, and BITB at -$12.6 million, with BTCO, EZBC, BRRR, HODL, and BTCW all reporting 0 flow, source: Farside Investors. Farside also reported BTC: 22.5 for the session and pointed to its data and disclaimers page at farside.co.uk/btc, source: Farside Investors.

According to Farside Investors, BlackRock's iShares Bitcoin Trust (IBIT) recorded a US$149.7 million daily net inflow on Sep 18, 2025 (source: Farside Investors; Farside BTC ETF flow dashboard at farside.co.uk/btc/). In US spot Bitcoin ETFs, net inflows represent primary market share creations that increase the trust’s bitcoin holdings and require purchasing additional BTC to back new shares (source: iShares Bitcoin Trust prospectus filed with the U.S. SEC). For trading, this inflow indicates incremental spot BTC demand entering via the ETF channel that participants can monitor alongside price and liquidity using the Farside dashboard (source: iShares Bitcoin Trust prospectus; Farside BTC ETF flow dashboard at farside.co.uk/btc/).

According to Farside Investors, Fidelity’s US Bitcoin ETF recorded a daily net outflow of $116 million, as reported on Sep 18, 2025. According to Farside Investors, the figure reflects the latest update in its US Bitcoin ETF daily flow tracker. According to Farside Investors, full dataset details and methodology are available on its website farside.co.uk/btc/.

According to @FarsideUK, Bitwise’s US Bitcoin ETF recorded a net daily outflow of $12.6 million in the latest Bitcoin ETF Daily Flow update. Source: Farside Investors on X (Sep 18, 2025) and Farside Bitcoin ETF flows page at farside.co.uk/btc. According to @FarsideUK, 10% of profits from this product are allocated to Bitcoin developers, with data and disclaimers available at farside.co.uk/btc. Source: Farside Investors on X and Farside Bitcoin ETF flows page at farside.co.uk/btc.

According to Farside Investors (@FarsideUK), Franklin Templeton’s US spot Bitcoin ETF (EZBC) recorded $0 million in daily net flow. Source: Farside Investors (@FarsideUK) tweet and flows dashboard at farside.co.uk/btc/. With net flow at zero, the fund added no net ETF-driven buy or sell pressure to BTC markets from this issuer for the session. Source: Farside Investors (@FarsideUK) data at farside.co.uk/btc/.

According to @FarsideUK, WisdomTree’s US spot Bitcoin ETF recorded $0 million net flow on Sep 17, 2025, indicating no net creations or redemptions for the day (source: Farside Investors - farside.co.uk/btc). This neutral flow suggests no incremental ETF-driven demand or supply pressure on BTC from this issuer during that session, which is typically liquidity-neutral for secondary market trading (source: Farside Investors - farside.co.uk/btc). Traders can monitor cross-issuer aggregate spot Bitcoin ETF flows on the Farside dashboard to gauge intraday liquidity, basis moves, and potential price impact (source: Farside Investors - farside.co.uk/btc).

According to @FarsideUK, the ARK 21Shares Bitcoin ETF (ARKB) recorded a daily net outflow of 32.3 million US dollars on 17 Sep 2025, based on the Bitcoin ETF Daily Flow dataset. Source: Farside Investors farside.co.uk/btc and Farside Investors on X. A net outflow indicates redemptions exceeded creations for the day, a core ETF flow mechanic relevant to trading liquidity and demand tracking. Source: U.S. SEC Investor Bulletin on Exchange-Traded Funds sec.gov. For US spot Bitcoin ETFs, creations and redemptions are processed in-kind or for cash against the underlying bitcoin, linking flow activity to ETF-held BTC and execution by authorized participants. Source: U.S. SEC spot bitcoin ETF approval orders and issuer disclosures sec.gov.

According to Farside Investors, Grayscale’s Bitcoin ETF reported a daily flow of US$22.5 million on Sep 17, 2025, as shown on its Bitcoin ETF Daily Flow tracker, source: Farside Investors, farside.co.uk/btc, Sep 17, 2025. The figure is denominated in USD and specifically references Grayscale within the Bitcoin ETF cohort tracked by Farside, source: Farside Investors, farside.co.uk/btc, Sep 17, 2025.

According to @FarsideUK, BlackRock’s US spot Bitcoin ETF (IBIT) recorded a daily net inflow of $209.2 million on Sep 17, 2025, based on Farside Investors’ ETF flow tracker at farside.co.uk/btc. Farside Investors’ dataset reports USD net flows by fund and date across US spot Bitcoin ETFs, enabling traders to track comparative BTC demand via reported net flows, source farside.co.uk/btc.

According to @FarsideUK, U.S. spot Bitcoin ETFs posted a total net inflow of $292.3 million on 2025-09-16; source: Farside Investors, farside.co.uk/btc. IBIT led with +$209.2 million, followed by FBTC at +$45.8 million, ARKB at +$40.7 million, and HODL at +$7.4 million, while BITB recorded a -$10.8 million outflow; source: Farside Investors, farside.co.uk/btc. BTCO, EZBC, BRRR, BTCW, GBTC, and BTC reported flat flows for the day; source: Farside Investors, farside.co.uk/btc.

According to Farside Investors, Invesco’s US Bitcoin ETF posted a net flow of 0 million dollars for the day referenced, dated Sep 17, 2025, based on the Farside Bitcoin ETF daily flow tracker. Source: Farside Investors X post dated Sep 17, 2025 and farside.co.uk/btc. Farside Investors reports issuer-level US Bitcoin ETF flows and lists Invesco with a 0 million daily net flow, indicating no net creations or redemptions recorded for that day on its tracker. Source: Farside Investors, farside.co.uk/btc.

According to Farside Investors, Fidelity’s US spot Bitcoin ETF (FBTC) recorded an estimated $45.8 million net inflow today, based on the Farside Bitcoin ETF Flow dashboard at farside.co.uk/btc/; source: Farside Investors. Farside classifies this figure as net creations minus redemptions for the trading day per its published methodology on the same dashboard; source: Farside Investors. The ETF referenced is the Fidelity Wise Origin Bitcoin Fund (ticker FBTC) as identified by Fidelity’s fund materials; source: Fidelity.

According to @FarsideUK, VanEck’s U.S. Bitcoin ETF recorded a US$7.4 million daily net flow, as shown on Farside Investors’ ETF flows dashboard; source: Farside Investors X post twitter.com/FarsideUK/status/1968105846182707600 and farside.co.uk/btc. According to @FarsideUK, 5% of profits from this ETF are allocated to Bitcoin developers, with details referenced in the same update; source: Farside Investors X post twitter.com/FarsideUK/status/1968105846182707600 and farside.co.uk/btc.

According to Farside Investors, the Bitwise Bitcoin ETF recorded a net outflow of 10.8 million USD on Sep 16, 2025, source: Farside Investors, farside.co.uk/btc. Farside Investors states that 10 percent of profits from this Bitwise product are allocated to Bitcoin developers, source: Farside Investors, farside.co.uk/btc. Farside Investors provides the full daily Bitcoin ETF flow dataset and related disclaimers on its dashboard, source: Farside Investors, farside.co.uk/btc.

According to @FarsideUK, Franklin’s U.S. spot Bitcoin ETF posted US$0 million net flow on Sep 16, 2025 (source: Farside Investors tweet and dashboard at farside.co.uk/btc). Based on the zero net creations/redemptions reported, primary-market demand from this issuer was neutral for the day, implying no incremental ETF-driven pressure on BTC liquidity from this vehicle (source: Farside Investors flow data at farside.co.uk/btc). Traders can review issuer-level net flows on the same Farside Investors dashboard to contextualize this reading within broader BTC flow momentum (source: farside.co.uk/btc).

According to Farside Investors, ARK recorded a daily net flow of US$40.7 million within U.S. Bitcoin ETF flows on Sep 16, 2025 (source: Farside Investors). Farside Investors also directs readers to its dataset and disclaimers at farside.co.uk/btc for the full Bitcoin ETF flow breakdown across issuers (source: Farside Investors). The update labels the figure as Bitcoin ETF Daily Flow in US dollars and specifies only the ARK value in the post text (source: Farside Investors).

According to @FarsideUK, WisdomTree’s US Bitcoin ETF posted $0 million net flow on Sep 16, 2025. According to @FarsideUK, this flat reading is shown on its Bitcoin ETF daily flows tracker for that date. According to @FarsideUK, the full dataset and disclaimers are available on its Bitcoin ETF flow dashboard.

According to the source, Bitcoin traders are evaluating whether a potential Federal Reserve rate cut is already reflected in BTC price and positioning, and a practical way to validate this is to compare CME FedWatch implied probabilities with the latest FOMC statement and Summary of Economic Projections to see if the market implied path aligns with Fed guidance, source: CME Group and Board of Governors of the Federal Reserve System. Cross asset confirmation for a priced in cut includes a weaker US Dollar Index and lower US two year Treasury yields into and after the decision window, which are typical market responses to easier policy, source: ICE Data Indices for DXY and US Department of the Treasury and Federal Reserve Economic Data FRED for yields. Derivatives signals consistent with full pricing in include neutral to negative BTC perpetual funding rates, a compressed basis between spot and futures, and moderating open interest that together imply limited incremental long leverage, source: Glassnode, Deribit, and Chicago Mercantile Exchange. Spot demand checks should focus on daily creations or redemptions in US spot Bitcoin ETFs such as iShares Bitcoin Trust and Fidelity Wise Origin Bitcoin Fund to see if net inflows persist beyond rate expectations, source: iShares, Fidelity, and Cboe BZX Exchange issuer disclosures. Options markets that show lower implied volatility and a softening downside skew into the event with muted realized volatility after the announcement indicate expectations were embedded ahead of time, source: Deribit and Laevitas. If BTC underperforms high beta equities following a dovish outcome, that relative move can signal the rate cut was anticipated by crypto relative to stocks, source: S and P Dow Jones Indices and Nasdaq.

According to @FarsideUK, BlackRock’s spot Bitcoin ETF (IBIT) posted a daily net flow of $261.8 million on Sep 16, 2025 (source: Farside Investors US Bitcoin ETFs tracker, farside.co.uk/btc). This ETF operates with cash creations/redemptions, meaning net creations require cash that the trust uses to buy bitcoin held in Coinbase Custody’s cold storage (source: iShares Bitcoin Trust Prospectus, SEC EDGAR). For traders, ETF cash creations convert dollar inflows into immediate spot BTC purchases by the trust, making US spot ETF net flows a direct input to near-term spot market demand (source: iShares Bitcoin Trust Prospectus, SEC EDGAR).