Fidelity Leads $433 Million Bitcoin ETF Rebound as Weekly Flows Nearly Break Even

U.S. spot Bitcoin exchange-traded funds finished the week with a sharp burst of demand, and Fidelity—not BlackRock—did most of the lifting.

The funds recorded a combined $433 million of net inflows on Friday, September 18, according to Farside Investors. Fidelity’s Wise Origin Bitcoin Fund, or FBTC, collected $310.7 million, making it the dominant source of demand for the session and reversing the fund’s outflow from one day earlier.

BlackRock’s IBIT added $108.4 million, while Bitwise, ARK 21Shares and VanEck supplied smaller positive totals. Those contributions put five separate issuers in positive territory and made the rebound broader than a single-fund surge.

The issuer-by-issuer table also showed zero net flow for Invesco, Franklin, Valkyrie, WisdomTree, Morgan Stanley and both Grayscale products. More importantly, none of the twelve tracked funds finished the session with a negative number, removing the issuer-level drag that had complicated the prior day’s otherwise positive result.

That was a clear improvement from Thursday’s mixed ledger, when the group gained $159.5 million overall. Fidelity and VanEck both recorded redemptions in that session while BlackRock supplied more than the entire net gain, so Friday represented both a larger total and a healthier distribution of demand.

Across the two sessions, the products absorbed $592.5 million on a net basis. Friday accounted for nearly three quarters of that two-day total.

Fidelity alone supplied more than half of the combined rebound, a notable change after its $16.6 million Thursday outflow. The numbers show both the speed of the reversal and the way leadership broadened beyond IBIT.

Bitcoin ETF Flow (US$ million) – 2026-09-18. Total net flow: 433. FBTC: 310.7. IBIT: 108.4.

— Farside Investors (@FarsideUK) September 19, 2026

Fidelity changed the shape of the rebound. The result matters for more than its headline total.

A day earlier, the same group of funds brought in $159.5 million, but that session was driven by $183.7 million for IBIT while FBTC lost $16.6 million. Friday’s reversal showed that the recovery was no longer resting on a single issuer.

Bitcoin ETF Flow (US$ million) – 2026-09-17. Total net flow: 159.5. IBIT: 183.7. FBTC: -16.6.

— Farside Investors (@FarsideUK) September 18, 2026

That broader participation is the encouraging part of the story. ETF demand can be volatile from one session to the next, and a large redemption from one product can obscure buying elsewhere.

On Friday, however, five issuers finished in positive territory and none of the tracked products posted a net outflow.

CryptoSlate’s review of the weekly flow data found that the late rebound nearly repaired the damage from earlier withdrawals. The five-session total remained slightly negative—roughly $27 million—but that was a dramatically better finish than investors faced after the midweek selloff.

Two strong days do not settle the trend. The cleanest reading is that institutional Bitcoin demand improved meaningfully at the end of the week, not that every concern disappeared.

Daily ETF flows are noisy. They can reflect portfolio rebalancing, market-making activity and short-term risk decisions as well as long-term conviction.

Still, the sequence is notable: $159.5 million entered on Thursday, followed by $433 million on Friday. Together, those sessions brought in $592.5 million.

Just as important, leadership rotated from BlackRock to Fidelity instead of fading when IBIT’s contribution became smaller.

For Bitcoin holders, the next test is persistence. Another run of broad issuer inflows would suggest that the rebound is becoming a sturdier source of spot demand.

A quick return to heavy redemptions would make this look more like a two-day repair after a difficult week.

For now, Fidelity’s $310.7 million session gave the ETF market exactly what it needed: a second strong day, wider participation and a near-reset of the weekly scoreboard.

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