Bitcoin ETFs Post Best Weekly Inflow Since October, Farside Data Shows

US spot Bitcoin ETFs took in roughly $2.4 billion over the week of September 21 to 25, the strongest five-day run since October 2025. The figure comes straight from Farside Investors, the site that has tracked these daily flows since the funds launched.

What the Farside Table Shows

Farside logs each fund by name every trading day. Its live table puts the five-day total at $2,385.8 million once you add up September 21 through 25. Rounded, that is the $2.4 billion figure now circulating on social media.

September 21 alone brought in $999 million, the single strongest day of the run. BlackRock's IBIT and Fidelity's FBTC carried most of the week, with Ark's ARKB also posting a large one-day figure on the opening day.

A Sharp Turn From Mid-September

The rebound stands out because the funds were bleeding money only a week earlier. September 15 alone saw $450.4 million leave the group, and September 16 added another $295.9 million in outflows.

September 17 and 18 then turned positive again, adding $159.5 million and $433.0 million. The stronger run from the 21st carried the week firmly into the green.

Grayscale's GBTC remains the most negative line on the whole table, having shed $27.8 billion since the funds converted from a trust in January 2024. IBIT, by contrast, has pulled in $65.3 billion over that same stretch, by far the largest single-fund total on the sheet.

No single headline explains the swing from outflows to inflows in one week. Farside's data does not label the cause of any single day's flow, so this article does not speculate on one.

Smaller funds barely moved either way across the same stretch. Invesco's BTCO, Franklin's EZBC and VanEck's HODL each logged multiple zero-flow days in a row. That underscores how concentrated the action stayed in the two largest issuers.

Where Bitcoin Sits Right Now

Bitcoin itself traded near $84,760 at the time of writing, up about 0.9 percent over the prior 24 hours. That is according to live CoinGecko data. Its 24-hour range ran from roughly $83,835 to $85,090.

Total crypto market capitalization stood near $2.97 trillion, with Bitcoin holding about 57 percent dominance. CoinGecko's Fear and Greed reading sat at a neutral 47, not the euphoric territory a headline inflow number might suggest.

Why the Weekly Number Matters

ETF flows are one of the few Bitcoin demand signals reported daily and audited by the funds themselves. That beats estimates pulled from exchange data. A five-day pull of this size means real dollars moved from brokerage accounts into fund shares backed by actual coins.

It does not by itself predict where price goes next. Farside's own table shows single days flipping from a $999 million inflow to much smaller prints within 24 hours. One strong week does not lock in a trend.

Traders watching the space will likely wait for the next full week of data before calling this a lasting shift in demand. A single strong week has reversed inside days before on this same table.

This article is for information only and is not investment advice. Bitcoin and ETF shares tied to it are volatile, and past flow patterns do not guarantee future results.