BlackRock's IBIT adds 1.97K BTC as spot Bitcoin ETF inflows run six sessions
US spot Bitcoin ETFs drew about $2.8bn over six straight sessions to September 24, 2026, led by BlackRock's IBIT, even as Bitcoin fell to $82K.
Key points
- BlackRock's iShares Bitcoin Trust bought 1.97K BTC worth $166m from Coinbase Prime, per Onchain Lens data cited by Ambcrypto.
- US spot Bitcoin ETFs logged net inflows for six consecutive sessions from September 17 to 24, 2026, totalling roughly $2.8bn.
- Crypto.news counted a five-session streak through September 23, with $346.98m of net inflows that day and about $2.65bn combined.
- On September 24, WisdomTree's BTCW was the only fund with outflows, at $4m, according to Ambcrypto.
- Wallets holding 100 to 1,000 BTC added 113,950 BTC between July 15 and September 23, lifting holdings 2.22% to about 5.24 million BTC, per Santiment.
US spot Bitcoin exchange-traded funds extended their net inflow streak to six consecutive sessions between September 17 and 24, 2026, pulling in roughly $2.8bn, according to Ambcrypto. BlackRock's iShares Bitcoin Trust, known as IBIT, led the buying and accumulated 1.97K BTC worth $166m from Coinbase Prime, per Onchain Lens data cited by the outlet. The purchases continued even after Bitcoin dropped to $82K.
The two outlets tracking the flows agree on direction but differ on the length of the run. Crypto.news, citing SoSoValue-linked data, reported a five-session streak through September 23, with $346.98m of net inflows that day and about $2.65bn combined across the five sessions. Ambcrypto's count includes September 24 trading as a sixth positive session. On September 24, WisdomTree's BTCW was the only fund with outflows, at $4m, per Ambcrypto.
Crypto.news reported $346.98m in net inflows on September 23, led by IBIT at $166.29m, Fidelity's FBTC at $143.24m, Morgan Stanley's MSBT at $32.41m and ARK 21Shares' ARKB at $5.04m. Bitcoin's Coinbase Premium Index has been negative for three straight days, sitting near -0.02 at the time of Ambcrypto's report.
Six sessions of inflows
Ambcrypto reported that exchange netflow has stayed negative for four consecutive days, overlapping with the ETF inflow run, as funds pulled supply off trading venues. Historically since ETFs launched in 2024, strong inflow periods have come before better price performance on Bitcoin charts, the outlet noted. Institutional demand is not uniform, however. Ambcrypto attributed the negative Coinbase Premium Index to US institutional investors who remain cautious, with the majority still selling rather than buying.
Crypto.news, citing Santiment, reported that wallets holding 100 to 1,000 BTC added 113,950 BTC between July 15 and September 23, lifting their combined holdings 2.22% to roughly 5.24 million BTC. Santiment called the cohort one of the wallet tiers that has tracked crypto market direction most closely over its five-year analysis, though it cautioned that historical correlation does not prove causation and that one entity can control several addresses.
Derivatives positioning cooled over the same window. Crypto.news, citing CryptoQuant analyst Amr Taha, said Binance Bitcoin open interest fell from roughly $5.4bn to $4.9bn between September 21 and 23, a $500m reduction equal to about 9.3% of outstanding positions, while cumulative volume delta dropped about 51%. The pullback from the $87,000 area was around 3.4% by Taha's account.
Exchange supply tightens
ETF flows have become the clearest read on institutional appetite, and the six-day run shows buyers stepping in on dips rather than waiting for a breakout. That matters because the offsetting signal, a negative Coinbase Premium Index, points to US-based institutions still treating rallies as exit opportunities. Crypto.news also flagged Bitfinex's buyer cost range of $85,000 to $86,500 and the firm's note that a sustained move below $81,300, especially alongside ETF outflows, would challenge its breakout reading.