Week in Numbers
Spot crypto ETFs took in $865.7 million across the five-session week ending Friday, September 4, per InflowScan data. That marks the second consecutive week of net inflows but at roughly 42% of the prior week's $2.05 billion pace. Bitcoin products did the heavy lifting, drawing +$702.7M ↑, followed by Ethereum funds at +$138.4M ↑, XRP vehicles at +$20.2M ↑, and Solana ETFs at +$4.4M ↑. The deceleration is consistent with buyers pacing rather than retreating — no single session printed red on the aggregate.
Daily Flow Breakdown
The week opened with a solid +$209.2M ↑ Monday print, then downshifted to +$224.7M ↑ Tuesday and a soft +$70.2M ↑ Wednesday. Thursday delivered the standout session at +$676.1M ↑ — nearly 78% of the entire week's total — before Friday cooled to +$134.9M ↑. Thursday's surge coincided with BTC's push to its weekly high of $81,478, and the pattern suggests bid-following behavior rather than programmatic accumulation. Absent that single session, weekly flows would have printed under $200M.
ETF Leaderboard
Concentration remained the defining feature. BlackRock's IBIT pulled in +$542.0M ↑ — 63% of the week's total net inflow and 77% of BTC-specific demand. ARK's ARKB at +$137.7M ↑ and Grayscale's BTC at +$85.8M ↑ rounded out the BTC leaders. On the ETH side, ETHA and ETHB, both BlackRock products, combined for +$139.6M ↑.
- IBIT (BlackRock): +$542.0M ↑
- ARKB (ARK Invest): +$137.7M ↑
- BTC (Grayscale): +$85.8M ↑
- ETHA (BlackRock): +$73.3M ↑
- ETHB (BlackRock): +$66.3M ↑
Outflows were confined to the alt-ETF fringe. Volatility Shares' SOLT and ProShares' SOLZ shed -$9.6M ↓ and -$5.3M ↓ respectively, dragging aggregate SOL flows to a near-flat +$4.4M ↑.
Price Scorecard
Every major closed the week green. Bitcoin ran from $77,672 to $79,675, a +2.6% ↑ gain, with an intraweek range of $78,626 to $81,478 — BTC failed to hold the $81K handle and settled back into the high-$79Ks. XRP led the majors at +3.0% ↑, moving from $1.358 to $1.399 and printing a $1.463 high. Ethereum added +1.6% ↑ to close at $2,456.60, tagging $2,548 midweek before rejection. Solana was the laggard at +0.2% ↑, essentially flat at $101.95 despite a $104.76 print. The price-flow relationship held cleanly for BTC and XRP; ETH's modest weekly gain despite $138M in inflows points to spot-market supply absorbing the bid.
Stablecoin Pulse
Dry powder held roughly steady. USDC supply expanded by +$425M ↑ to $74.3B, while USDT contracted marginally by -$105M ↓ to $183.3B. Net stablecoin issuance of roughly +$320M ↑ is modest against $866M of ETF absorption, per InflowScan data, and suggests fresh fiat conversion rather than sidelined-capital deployment drove the week's inflows.
FlowScore Check
Friday's closing FlowScores tell a different story than the raw dollar leaderboard. Solana tops the board at 68.76/100 despite negligible absolute inflows — a function of stable, low-outflow behavior against a small base. Ethereum sits at 56.87, edging out Bitcoin at 56.71, per InflowScan data. All three sit in the 55-70 corridor, historically associated with constructive-but-not-euphoric flow regimes.
Week's Top Stories
- El Salvador BTC purchase disputed — Government added 1,540 BTC to reserves, though the IMF says the acquisition was not funded via new expenditure, complicating the treasury-narrative optics.
- Fed rate call in flux — Governor Waller's commentary reframed the September rate decision as a coin toss, with BTC's rally reading as partial front-run.
- Ethereum breaks $2,500 — ETH tagged $2,548 midweek before rejection; the ETH community is weighing 35 new product proposals.
- Grayscale tokenized-stock thesis — Research note named Robinhood Chain, BNB Chain, and Solana as likely infrastructure winners.
- Solana upgrade bug — A hidden defect capable of freezing network readers and disabling fee limits surfaced, a technical overhang worth tracking against SOL's flat weekly print.
- XRP-Ripple sports partnership — New commercial deal coincided with the week's +3.0% ↑ XRP move.
What to Watch Next Week
Three data points frame the setup. First, whether IBIT's demand concentration persists or broadens — a full week of ARKB and FBTC matching IBIT would signal a healthier bid. Second, whether BTC can reclaim the $81,478 weekly high; failure to break above would extend the current $78K-$81K range. Third, the Fed rate decision path — Waller's commentary made September live, and any hawkish repricing would test the flow regime that carried this week.