US spot Bitcoin ETFs closed the week ending October 23 with $301.2 million in net inflows, according to data from Farside Investors. BlackRock's IBIT accounted for $565.7 million of that total — more than the entire market combined — while Fidelity's FBTC and ARK 21Shares' ARKB both posted net weekly outflows. The complex returned to positive territory only because IBIT's gains outweighed withdrawals across rival funds.

Net-flow totals aggregate every fund's daily creations and redemptions, so a single headline number can conceal sharp divergences between issuers — a pattern that surfaced repeatedly this week.

Early-Week Buying Led by IBIT

Farside's ledger shows US spot Bitcoin ETFs absorbed roughly $1.07 billion across the first three trading sessions. On October 19, the complex booked $526.7 million in net inflows, driven entirely by IBIT — a session in which one product supplied all of the market's net demand.

Momentum cooled on Tuesday, when total inflows slipped to $23.2 million. IBIT added another $29.9 million and FBTC took in $3.6 million, but Bitwise's BITB shed $10.3 million, cutting into those purchases.

October 21 was the week's second-largest session at $524.8 million, with IBIT leading at $235 million. FBTC followed with $212.7 million, while Grayscale's GBTC and Bitwise's BITB added $32.6 million and $19.2 million respectively. Smaller inflows into ARKB, EZBC, and Grayscale's Bitcoin Mini Trust rounded out the day.

Rival Funds Face Heavy Midweek Withdrawals

After three consecutive days of inflows, flows reversed direction on Thursday, October 22, when five funds logged combined outflows of $635.6 million. IBIT led the exits at $254.1 million, FBTC followed with $217.5 million, and ARKB lost a further $109.4 million. That session set the stage for Friday's Bitcoin ETF outflows of $137.9 million, and it showed how quickly a week's direction can flip before the final session settles.

Friday delivered another $137.9 million in reported net outflows. IBIT shed $110.3 million and FBTC recorded $31.8 million in exits, while Morgan Stanley's MSBT attracted $4.2 million — only a partial offset. Friday's figures remain open, as VanEck's HODL had not reported as of October 24, meaning the week's final tally could still shift once every issuer has filed.

Even so, IBIT ended the week with $565.7 million in net inflows, a haul that exceeded the market's entire $301.2 million gain.

IBIT Snaps a Two-Week Outflow Streak

Among rival funds, FBTC took the largest weekly hit at $116.6 million, followed by ARKB with $99.6 million in outflows. GBTC fell $51.8 million. Friday's withdrawals from IBIT equaled roughly 0.17% of its reported $65.88 billion in net assets — a reminder that even nine-figure redemption days register as fractional moves against a base that size, one reason a single fund can determine whether the complex's ledger lands positive or negative.

The late exits did not erase the week's earlier demand. Farside's data shows Bitcoin ETFs lost $678.9 million in the week beginning October 5, with another $228.4 million leaving the following week — a combined $907.3 million. The latest $301.2 million in inflows recovered approximately one-third of that drawdown. Because flows track primary-market creations and redemptions, ETF flow watchers read the data as a direct gauge of how much capital these vehicles absorb or shed — and the week demonstrated that the complex can post a net gain even while most individual funds continue to record outflows.