Monthly Review: Bitcoin ETFs Post a Losing October
This is bryptoflows' monthly review, covering the full calendar month rather than a single reporting week. A separate weekly recap published the same day covers the final reporting week of October in more detail.
October in one number
US spot Bitcoin ETFs shed -$515.9M net across the 22 reporting sessions of October — the category's first net-negative calendar month since June's -$4,509.7M, which broke a three-month run of gains in July (+$172.8M), August (+$3,539.1M) and September (+$2,647.7M). October's loss is real but modest by the year's own standards: among the five net-negative months of 2026, only February's -$206.6M was smaller in magnitude, and October's deficit is a fraction of January's -$1,604.8M, May's -$2,406.0M or June's -$4,509.7M. The month pushed 2026's year-to-date flow down to +$453.9M, thinner than the roughly +$1,021.3M this column reported at the end of September but still positive for the year.
The month split into two distinct stretches. The first three weeks, October 1 through 23, were genuinely volatile but net positive at +$466.7M, carried by two separate rally days and absorbing two separate bottom-2% selloffs along the way. The final five sessions, October 26 through 30, erased that entire gain and more: -$202.4M, as detailed in today's weekly recap, with essentially the whole of that loss landing in a single Friday session. October's full-month total, in other words, was decided by its last trading day.
Best and worst days
October 19 was the month's best single session: +$526.7M, built almost entirely on BlackRock's IBIT alone, which took in +$665.2M that day against a combined -$138.5M from FBTC and GBTC — a narrow rally, one fund positive against two negative. October 21, two sessions later, posted the second-best day at +$524.8M, but with the opposite character: seven of twelve products positive and none negative, the month's broadest session by a wide margin.
October 30 was the month's worst day by a clear margin: -$643.2M, landing at the 1.7th percentile of all 720 sessions bryptoflows has on record since January 2024. October 22 was close behind at -$635.6M, the 1.7th percentile as well — effectively the same extreme rank, three weeks apart. October 7 rounds out the month's third-worst day at -$484.9M. All three of the month's worst sessions were broadly negative with zero or one fund positive against five or six negative, the mirror image of October 21's broad rally. A month that produced one of its best-ever rally days also produced three of its worse-than-typical selloffs, with almost nothing in between on the extremes.
Issuer rotation
BlackRock's IBIT was the only major fund to finish October net positive, taking in +$932.1M — more than the category's entire negative total, meaning every other fund combined shed roughly -$1,448.0M against it. That is an unusually one-sided month even by this category's own history of IBIT dependence.
The laggards were not where this column's coverage has usually found them. Fidelity's FBTC was October's single worst performer at -$754.5M, its weakest month in some time, ahead of ARK 21Shares' ARKB at -$444.0M. Grayscale's legacy GBTC, usually the category's chronic underperformer, was third-worst this month at -$184.0M — still negative, and still dragging Grayscale's combined total (GBTC plus the newer BTC mini trust, at -$11.1M) to roughly -$195.1M for the month, but a smaller drag than FBTC or ARKB posted on their own. Bitwise's BITB rounded out the negative side at -$84.1M.
On the positive side outside of IBIT, Morgan Stanley's MSBT added +$34.6M across seven positive sessions and zero negative ones, and Franklin Templeton's EZBC added +$12.0M. VanEck's HODL was marginally negative at -$4.8M, WisdomTree's BTCW at -$3.8M, and Invesco Galaxy's BTCO at -$8.3M — all small enough to be rounding errors against the month's larger swings. Valkyrie's BRRR reported exactly zero every session it appeared in.
Price and the cushion that thinned
Bitcoin's price move gave the flow numbers their shape, and it moved almost entirely downward. The coin opened October near $83,607, rallied to a month high of $87,235 on October 2, then spent the rest of the month giving that gain back and more, bottoming at an intraday low of $76,264 on October 30 before closing that session at $77,338. bryptoflows' own live price feed shows bitcoin at roughly $77,611 as of this writing. Net across the month: a decline of roughly 7.5% from the October 1 open to the October 30 close, and a round trip of more than 12.5% from the intra-month high to the intra-month low — almost the mirror image of September's rally from roughly $75,000 to above $87,000.
The cumulative flow picture thinned alongside price. Cumulative net flow into the category since inception stood at roughly $57,564.0M at the end of September; by October 30 it had fallen to $57,048.1M. Measured against the category's all-time cumulative peak of $62,735.9M, the drawdown widened from -8.2% at the start of the month to -$5,687.8M, or roughly 9.1% below peak, by October 30 — the widest this column has reported the drawdown since before September's rally.
Strategy: four filings, 851 bitcoin added, then a stop
Strategy's bitcoin treasury grew in October, but the growth decelerated to zero by the month's last filing. Across the four weekly 8-Ks dated in October — October 5, 13, 19 and 26 — the company disclosed three acquiring weeks and one flat week, for a net change of +851 BTC over the month (334 + 250 + 267 + 0). Holdings opened October at 847,666 BTC, per the September 28 filing, and stood at 848,517 BTC as of the October 26 filing, an increase of roughly 0.10%.
The pattern inside those four filings was a steady decline in purchase size: 334 BTC on October 5, 250 BTC on October 13, 267 BTC on October 19, then zero on October 26 — the first "none" week since September 14 and the end of a run of five straight acquiring filings stretching back to September 21. Strategy's average cost basis crept up only slightly across the month, from $75,437 to $75,446 per coin, on a total cost basis that rose from $63.95B to $64.02B, roughly $72.3 million of combined spending across the three buys. The purchase prices themselves drifted with the market: $85,928, then $86,194, then $82,900, each successive buy coming at a lower average price than the last as bitcoin itself declined.
The month's more consequential treasury event had nothing to do with bitcoin directly. The October 26 filing, covering the October 19-25 period, disclosed that Strategy spent $204.9 million buying back STRC preferred stock, draining its discretionary USD Cash pool by 45.8% (from $447.3 million to $242.4 million) in the same week it bought no bitcoin at all — detailed in Thursday's treasury column. Two days later, on October 28, Strategy's stockholders approved converting its four preferred series to daily dividend accrual, a payment-mechanics change rather than a new source or claim on capital.
With bitcoin closing the month near $77,338 against Strategy's $75,446 average cost, the position's unrealized gain has narrowed to roughly 2.5-2.9% depending on the exact price used — a sharply thinner cushion than the near-12% reading this column reported at the end of September, built almost entirely on bitcoin's month-long price decline rather than anything Strategy itself did. Strategy's financing capacity, which depends on new share sales, sits at $44.03B of undrawn capacity across its five at-the-market programs as of the October 19 filing, unused in the October 26 period because no shares were sold.
What to watch into November
- Whether Strategy's next filing, due around November 2, extends the zero-purchase pattern or returns to buying — and whether bitcoin has fallen far enough by then to put the position underwater against its own average cost, a move of roughly 2.5-3% from current levels.
- Whether November opens with a continuation of Friday's selloff or a bounce; the month ended on its single worst session, the kind of base that can go either way.
- MSCI's eligibility review naming Strategy among companies without substantial operating assets, with a final list of affected names due November 11 and any index changes effective at the close of November 30.
- Whether the year-to-date flow figure, now thinner at +$453.9M after October's loss, holds through November or slips negative for the first time since late September.
- Whether IBIT's outsized share of October's demand — effectively the entire category's positive flow, against nearly $1.45 billion of combined outflow from every other fund — persists into November or broadens the way it briefly did on October 21.
Track the flow data live on the flow pulse overview and ETF flow dashboards, and Strategy's full treasury and financing history on the MSTR breakdown. Flow and treasury figures throughout are read directly from bryptoflows' own API — ETF flows from Farside Investors, Strategy detail from SEC filings; price figures are from bryptoflows' own live price feed and candle data, retrieved and published October 31, 2026.