A Bitcoin ETF is an exchange-traded fund that tracks Bitcoin's price and trades on a normal stock exchange. Through a brokerage account, people gain exposure without buying Bitcoin directly. No wallet, no private key, no crypto exchange.
On 10 January 2024, the US Securities and Exchange Commission approved the first 11 spot Bitcoin ETFs. Trading began the following day. By 31 July 2026, cumulative net inflows across those funds reached $51.3 billion.
Spot vs futures ETFs
Two different products, frequently confused.
A spot Bitcoin ETF holds actual Bitcoin. Bought on exchanges and stored with a custodian, that Bitcoin makes the fund's value track the asset closely.
A futures Bitcoin ETF holds futures contracts instead. Because those contracts expire and must be rolled forward, tracking error and cost accumulate over time. In the US, futures ETFs were approved years before spot funds, because regulators considered the futures market more supervised.
Spot funds track better. Hence why the approval mattered.
How a spot Bitcoin ETF works
- You buy shares through an ordinary brokerage account, the same way you buy a stock.
- Authorised participants create or redeem shares in large blocks with the issuer.
- The issuer buys or sells Bitcoin to match, holding it with a qualified custodian.
- The share price tracks Bitcoin's price, minus the fund's fee.
Note what you own. Shares in a fund that owns Bitcoin, not Bitcoin. Withdrawing the underlying asset is not possible, nor sending it anywhere, nor using it on-chain.
The market as it stands
Concentration is the defining feature.
| Fund | Issuer | Approximate AUM | Share |
|---|---|---|---|
| IBIT | BlackRock | $54 billion | ~49% |
| FBTC | Fidelity | $17 to 18 billion | ~15% |
| GBTC | Grayscale | $15 billion | ~10% |
| Others | ARK 21Shares, Bitwise, and smaller issuers | Remainder | ~26% |
Figures as of early 2026. Twelve US spot Bitcoin ETFs now trade.
About how fees drive behaviour, the Grayscale story explains a great deal. In January 2024, GBTC converted from a closed-end trust into an ETF while keeping a 1.50% fee, against 0.12% to 0.25% at newer competitors. Roughly $17.5 billion left it. Never before had a rotation of that size happened in ETF history.
What the flow data shows
Among analysts, flows are the number that gets watched, and the pattern is not one-directional.
Across 656 trading sessions from 11 January 2024 to 31 July 2026, net flows were negative on 262 of them, about 40%. Each year the share rose: 31% of sessions in 2024, 40% in 2025, and 54% through 2026. From 15 May to 3 June 2026, the longest outflow streak ran 13 sessions and shed $4.37 billion.
Annual totals stayed positive throughout. Net inflows reached $48.7 billion in 2024 and $47.2 billion in 2025. In Q1 2026 alone, another $12.4 billion arrived.
Why they changed the market
Access, mainly.
For pension funds, registered advisers, and institutions unable to custody crypto directly, a route opened through infrastructure they already used. That capital behaves differently from earlier crypto money. Arriving through allocation decisions, it has shown little appetite for rotating onward into smaller tokens.
In Bitcoin dominance one consequence is visible, since it has stayed structurally higher than in previous cycles. After the 2024 to 2025 advance, the broad altcoin rotation veterans expected never fully arrived.
ETF vs holding Bitcoin directly
| Bitcoin ETF | Holding Bitcoin | |
|---|---|---|
| What you own | Fund shares | The asset |
| Custody | Issuer and its custodian | You, or an exchange |
| Trading hours | Stock market hours only | Continuous |
| Ongoing cost | Annual expense ratio | Trading fees, network fees |
| Can you transact on-chain | No | Yes |
| Tax treatment | Usually as a security | Varies, often as property |
Different products for different purposes. For price exposure inside an existing portfolio, an ETF fits. For the asset itself, direct ownership does.
Risks to understand
- Fees compound. An expense ratio applies every year you hold, whether the price rises or falls.
- Market hours create gaps. Bitcoin trades continuously, ETFs do not. Weekend moves show up as a gap at Monday's open.
- No on-chain use. Shares cannot be sent, staked, or spent.
- Custody is concentrated. A small number of custodians hold the Bitcoin behind most of these funds.
- Tracking error. Spot funds track closely and not perfectly, and the gap widens during volatility.
- The underlying asset is unchanged. An ETF wrapper does not reduce Bitcoin's volatility. It has fallen more than 75% from a peak on four separate occasions.
Trade Bitcoin on mb.io
An ETF gives you price exposure. To own Bitcoin itself you need the asset, and that requires a regulated venue.
mb.io is a regulated crypto spot exchange backed by MultiBank Group, a financial institution founded in 2005 that serves more than 2 million clients across 100+ countries.
- Regulated by VARA in the UAE and AUSTRAC in Australia
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Open your account and start trading on mb.io.
Frequently asked questions
When were spot Bitcoin ETFs approved?
On 10 January 2024 the SEC approved the first 11, and they began trading the next day. Twelve US spot Bitcoin ETFs trade today.
What is the difference between a spot and a futures Bitcoin ETF?
A spot ETF holds actual Bitcoin. Futures ETFs hold contracts that expire and must be rolled forward, adding cost and tracking error over time.
Do I own Bitcoin if I buy a Bitcoin ETF?
No. You own shares in a fund that owns Bitcoin. Withdrawing the asset, sending it to a crypto address, or using it on-chain are all impossible.
Which Bitcoin ETF is the largest?
BlackRock's IBIT, at roughly $54 billion in assets and about 49% of the market as of early 2026. Second is Fidelity's FBTC, at $17 to 18 billion.
Why did Grayscale's GBTC lose so much money?
After converting to an ETF in January 2024 it kept a 1.50% fee, while newer competitors charged 0.12% to 0.25%. Roughly $17.5 billion rotated out, the largest such move in ETF history.
Have Bitcoin ETFs seen outflows?
Frequently. Between January 2024 and July 2026, net flows were negative on 262 of 656 sessions, and the share of negative sessions rose each year. Cumulative flows remained positive at $51.3 billion.
Are Bitcoin ETFs safer than buying Bitcoin?
Removing self-custody risk, they add fund fees, market-hours constraints, and reliance on the issuer's custodian. The underlying volatility is identical either way.
How much do Bitcoin ETFs charge?
Among the newer funds, expense ratios generally run from about 0.12% to 0.25% a year. GBTC is the outlier at 1.50%.
