U.S. spot bitcoin exchange-traded funds pulled in $532.2 million on Monday, May 4, capping a three-day stretch that has now poured $1.18 billion of fresh capital into the funds, according to data published by Bitbo. BlackRock’s iShares Bitcoin Trust (IBIT) alone took $335.5 million. Fidelity’s Wise Origin Bitcoin Fund (FBTC) added $184.6 million. Bitcoin closed back above $80,000 for the first time since late January, trading near $80,630 by Monday afternoon.
Three days. Almost $1.2 billion in. And ten of the thirteen U.S. spot bitcoin funds reported zero flow on Monday, neither in nor out.
That uneven distribution matters. Two funds captured roughly 97.6% of the day’s total.
Why the $532M Run Matters Right Now
Monday’s net inflow extends a streak that began with $14.8 million on April 30 and accelerated to $629.7 million on May 1. Three sessions, $1.18 billion. The cumulative net inflow into the 13 spot bitcoin ETFs now stands at $59.3 billion since launch in January 2024. Total assets under management have crossed $106.4 billion, equal to 6.7% of bitcoin’s market capitalization.
The timing is loud. Bitcoin had spent most of February, March, and early April below the $80,000 line. The reclaim happened in Asian trading hours, then held into the U.S. session. The Coinglass cumulative spot bitcoin ETF tracker shows nine consecutive days of net inflows leading into Monday, totaling roughly $2.7 billion over three weeks.
Consensus 2026, the year’s largest crypto industry conference, opened in Miami the same week. The flow streak is reading as the institutional bid that the prior six weeks of choppy price action had drained. Monday’s daily total alone, sourced from Bitbo’s spot bitcoin ETF flow ledger, exceeds the average daily inflow recorded across most of Q1 2026.
BlackRock and Fidelity Soak Up Almost All the Money
Two funds did almost all the work. BlackRock’s iShares Bitcoin Trust product page shows IBIT now holds roughly $63 billion in assets, by far the largest spot bitcoin product worldwide. Fidelity’s Wise Origin Bitcoin Fund has crossed $11.27 billion in cumulative inflows since its January 2024 launch, per Fidelity’s FBTC fund disclosure page.
Morgan Stanley’s MSBT, launched in April, contributed $12.2 million on Monday, the third positive number on the ledger. Every other product, including Ark/21Shares ARKB, Bitwise BITB, and Grayscale’s two products, posted zero net flow.
That kind of two-fund concentration is unusual even by ETF standards. In a single asset category with thirteen listed products, you would normally expect three or four winners on a heavy-flow day. Monday split closer to a duopoly with a junior partner.
| Fund | Ticker | May 4 Net Flow | Expense Ratio |
|---|---|---|---|
| BlackRock iShares Bitcoin Trust | IBIT | $335.5M | 0.25% |
| Fidelity Wise Origin Bitcoin Fund | FBTC | $184.6M | 0.25% |
| Morgan Stanley Bitcoin ETF | MSBT | $12.2M | 0.14% |
Strong demand for low-fee exposure, plus advisor familiarity with the iShares and Fidelity brands, explains a lot of the gap. So does the share of allocations now flowing through RIAs and family offices that already custody at one of the two firms.
The split also tells you what the streak is. It is not a broad rotation across the category. It is a concentrated bid into the two largest, most liquid vehicles, the kind of behavior that fits institutional allocation desks rather than retail flow.
The Fragile Ground Beneath the $80,000 Reclaim
The flow story has a counterweight. CryptoQuant analysts, in a CryptoQuant April 30 research note on bitcoin demand, found that bitcoin’s April rally was driven entirely by growth in perpetual futures positioning, while on-chain spot demand contracted through the same window.
Bitcoin’s return to $80,000 is being powered by buyers who don’t fully trust it. The April move reflects growth in perpetual futures demand, while spot demand has remained in contraction throughout the rally.
That divergence, perpetual futures positions rising while underlying spot buying does not, has historically preceded sharp reversals once positioning unwinds. Funding rates on offshore perpetuals also climbed during the run-up, a sign that the long side has been paying to stay in. The ETF flow ledger and the futures positioning data are pointing at the same demand surface from opposite ends.
Morgan Stanley’s 0.14% Newcomer Crashes the Top Tier
Morgan Stanley launched MSBT on April 8, 2026, on NYSE Arca, with a 0.14% expense ratio, the cheapest spot bitcoin ETF on the market. IBIT and FBTC charge 0.25%. ARKB charges 0.21%. BITB charges 0.20%.
“Arguably the biggest bitcoin ETF launch since they began,” said Eric Balchunas, senior ETF analyst at Bloomberg Intelligence, ranking the debut in the top 1% of all U.S. ETF launches. Day-one inflows hit $33.9 million across more than 1.6 million shares traded, the strongest opener in Morgan Stanley’s ETF history across any asset class.
MSBT crossed $100 million in cumulative inflows during its first eight trading days, with about 80% of exposure arriving through self-directed channels rather than advisor allocations. Balchunas projects the fund will reach $5 billion in assets within its first year.
Monday’s $12.2 million inflow looks small next to IBIT’s haul, but the fund has booked positive net flow on the majority of trading days since launch. The fee discount is doing what fee discounts do.
Where the Other Ten Funds Stand
Ten products posted zero net flow on Monday, an outcome more telling than it sounds for Grayscale’s GBTC. The fund has bled roughly $25.9 billion in cumulative outflows since converting from a trust to an ETF in January 2024, per data tracked at Farside Investors’ bitcoin ETF daily flow database. Its 1.5% management fee, the highest in the category, has steadily migrated capital to lower-cost peers.
- Grayscale GBTC: 1.50% expense ratio
- BlackRock IBIT: 0.25% expense ratio
- Fidelity FBTC: 0.25% expense ratio
- Ark/21Shares ARKB: 0.21% expense ratio
- Bitwise BITB: 0.20% expense ratio
- Grayscale BTC Mini Trust: 0.15% expense ratio
- Morgan Stanley MSBT: 0.14% expense ratio
For investors, the choice has narrowed almost purely to basis points. On a $100,000 position held one year, the fee gap between MSBT at 0.14% and the original GBTC at 1.50% works out to roughly $1,360 a year. Over a decade, the same gap compounds to more than $48,000 before counting any difference in tracking error.
Ether ETFs Quietly Pile On
Bitcoin’s was not the only crypto ETF category seeing capital on Monday. U.S. spot ether funds pulled in $61.3 million, a second straight day of net inflows, again led by BlackRock and Fidelity.
- $54.83M into BlackRock’s ETHA on May 4
- $6.46M into Fidelity’s FETH on the same session
- 2 days of consecutive net inflow, breaking a March pattern of redemptions
The 12 listed ether products hold combined assets that have rebuilt steadily since the late-2025 redemption wave. Total ether ETF AUM remains a fraction of the bitcoin category, but the directional shift has implications for how multi-asset crypto allocations get rebalanced.
The smaller dollar figure understates the meaning. Ether ETFs spent stretches of February and March in net outflow. Two consecutive positive days, while modest, breaks a pattern that had hardened.
Frequently Asked Questions
How do I buy a spot bitcoin ETF in the United States?
Buy it through any standard brokerage account. IBIT, FBTC, MSBT, ARKB, BITB, and GBTC all trade on regulated U.S. exchanges with tickers, just like a stock. Open an account at Fidelity, Charles Schwab, Robinhood, or any major broker, search the ticker, and place an order. No crypto wallet, exchange account, or self-custody setup is required, and settlement happens in cash.
Which spot bitcoin ETF has the lowest fee right now?
Morgan Stanley’s MSBT, at 0.14%, is currently the cheapest U.S. spot bitcoin ETF. Grayscale’s BTC Mini Trust is second at 0.15%. Bitwise BITB charges 0.20%, ARK/21Shares ARKB charges 0.21%, BlackRock IBIT and Fidelity FBTC both charge 0.25%, and Grayscale’s original GBTC remains the outlier at 1.50%, more than ten times the cheapest option in the category.
Is IBIT or FBTC the better bitcoin ETF for retail investors?
Both charge the same 0.25% fee, both are highly liquid, and both track the spot price closely. IBIT is larger, around $63 billion in assets versus FBTC’s $11 billion plus, which means tighter bid-ask spreads on heavy-volume days. FBTC custodies its bitcoin with Fidelity Digital Assets directly, which can simplify reporting for clients already at Fidelity. For most retail investors, the difference is negligible.
Can I hold a spot bitcoin ETF in an IRA or 401(k)?
Yes, in most cases. IBIT, FBTC, and the other spot bitcoin ETFs trade like ordinary securities, so any brokerage IRA, Roth IRA, or self-directed 401(k) that allows ETF purchases can hold them. Most employer-sponsored 401(k) plans still restrict the menu, so check with your plan administrator. A handful of large platforms still block crypto ETF trading on their retail apps as of May 2026.
Will spot bitcoin ETFs pay a dividend or yield?
No. Spot bitcoin ETFs hold physical bitcoin and do not generate income. There is no staking yield, no dividend, no interest payment. Returns come solely from price appreciation of the underlying bitcoin, minus the annual expense ratio. Some ether ETF issuers, including BlackRock, have filed amended applications to add staking yields, but bitcoin ETFs cannot offer the equivalent.
The May 4 ledger reads like a relief print of capital flow. Bitcoin held above $80,000, two funds collected nearly the entire bid, and the ten products in the middle of the category did not see a single dollar move. Whether the streak survives a futures unwind is the question Tuesday’s open will start to answer.
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