BITO: the fund that proved demand existed, then got structurally beaten

What BITO is

BITO is a bitcoin futures fund. It does not own bitcoin, it has never owned bitcoin, and under its current design it cannot own bitcoin. What it owns is a book of cash-settled futures contracts on the CME and on Coinbase Derivatives, some swap agreements, and a large pile of short-term Treasuries and cash posted as collateral against them. Most of the derivatives sit inside a wholly owned Cayman Islands subsidiary, an arrangement used so that the fund can hold commodity-linked exposure while keeping its tax status intact.

It listed on NYSE Arca on 18 October 2021 and was the first bitcoin-linked ETF a US investor could buy in an ordinary brokerage account. The launch was extraordinary. Money arrived at a rate almost nobody had modelled, and the fund became the fastest ETF of any kind to reach a billion dollars at the time. That mattered far beyond ProShares. It was the empirical proof that demand for bitcoin inside a wrapper was real, large and immediate — the evidence that made the argument for the spot funds that followed. On 1 September 2026 it held $1,663,358,345, which is a solid business and a small fraction of what it once looked capable of becoming.

The name has been trimmed since launch: it is now simply the ProShares Bitcoin ETF, the word "Strategy" having been dropped. The mechanics did not change with the name. If you are new to the wrapper itself, start with our guide to what a Bitcoin ETF actually is, because the difference between owning coin and owning a claim on a derivative is the entire subject of this page.

Roll cost, explained properly

Every futures contract has an expiry date. A fund that wants continuous exposure therefore cannot buy once and hold; it must sell the contract that is about to expire and buy a later-dated one, over and over, forever. That transaction is the roll, and it is where the money goes.

The price of a later-dated bitcoin future is usually higher than the price of a nearer one. This shape is called contango, and it is not a market anomaly — it reflects a cost-of-carry premium. Someone who sells you exposure three months out has to fund and hedge that position for three months, and the futures price embeds what that costs. Bitcoin futures have spent most of their history in contango, which is what makes this a structural issue rather than an occasional one.

Now watch what the roll does in a contango market. The fund sells the expiring contract, which trades at the lower nearby price, and buys the further-dated contract, which trades at the higher price. Sell low, buy high, repeat every month. Each roll converts the difference between the two prices into a permanent leak. Nothing has to go wrong for this to happen. The bitcoin price can be perfectly flat and the fund will still lose ground, because the loss is generated by the shape of the curve rather than by the direction of the asset.

The reverse shape, backwardation, does exist. When nearby contracts trade above deferred ones, the roll works in the fund's favour and adds return. It happens in bitcoin from time to time, usually during sharp risk-off episodes. But it has been the exception, and a strategy that only works when the curve inverts is not a strategy you can plan around. We work through the arithmetic across the whole category on the bitcoin futures ETF page.

The curve

Why spot funds took the category

Put the two costs together and the outcome was never in doubt. A spot fund charges roughly 0.20% to 0.25% and holds the asset, so its tracking difference against bitcoin is close to the fee and very little else. BITO charges 0.95% and then pays the roll on top. Over a single quarter the gap can look manageable. Over three or five years it compounds into a difference that no amount of trading skill recovers, and BITO has chronically trailed spot bitcoin as a result.

The moment the US spot Bitcoin ETFs began trading in January 2024, the futures products lost their reason to exist for most buyers. They had only ever been a workaround — the best available approximation while the SEC declined to approve a fund that held coin. Once the workaround was unnecessary, assets moved. The comparison of the two mechanisms in detail lives on our spot versus futures page, and the cost side is broken down on the fee analysis page.

The casualties tell the story more bluntly than any performance chart. VanEck's XBTF last traded on 30 January 2024, closing within days of VanEck's own spot fund reaching the market — the issuer effectively replaced its own product. Its ether futures fund EFUT last traded on 16 September 2024. BITO survived because it was first, largest and best known, not because the structural problem was solved.

The registered-fund advantage

Here is the part that gets left out of most write-ups, and it is the reason BITO has not simply been abandoned. BITO is a registered investment company under the Investment Company Act of 1940. The spot Bitcoin ETFs are not. They are grantor trusts registered under the Securities Act of 1933, which is a materially lighter regime.

The difference is not cosmetic. A 1940 Act fund has an independent board of directors owing fiduciary duties to shareholders. It operates under statutory limits on leverage and on borrowing. It faces restrictions on transactions with affiliates, designed to stop a sponsor trading with its own fund on terms that favour the sponsor. It must maintain a compliance programme with a designated chief compliance officer reporting to that board, and it is subject to custody and valuation rules written for pooled investment vehicles. A 1933 Act grantor trust has none of that architecture. It has a sponsor, a trustee, a custodian and a set of disclosure obligations, and the protections come from contract and disclosure rather than from the statute.

For most individual investors this changes nothing they will ever notice. But it changes eligibility. Some retirement plans, some institutional mandates and some advisory platforms are written to permit registered investment companies and nothing else, and no amount of arguing about tracking error moves that line. For those buyers BITO is not the expensive option — it is the only option in the category, and the roll cost is the price of admission. We cover the broader risk picture, including this structural distinction, in the guide to Bitcoin ETF risks.

The monthly distribution

BITO pays monthly. Bitcoin, obviously, pays nothing, so the distribution is manufactured by the structure rather than earned from the asset. The collateral behind the futures book is held in short-dated Treasuries and cash, which generate interest, and the fund may also distribute realised gains from its derivatives positions and, in some periods, return of capital. The mix is reported after the fact rather than promised in advance.

This is a genuine feature for some holders, and we would not pretend otherwise. An investor who wants a cash payment landing in the account every month gets one here, from a fund that also gives bitcoin price exposure — something no spot ETF offers, because a spot trust has no income to distribute and sells bitcoin only to pay its own fee. Just do not confuse the payment with a yield on bitcoin. If regular distributions are the primary objective rather than a nice side effect, the covered-call funds covered on our bitcoin income ETF page are built explicitly for that job, with their own and rather different set of trade-offs.

Who should still consider BITO

Three groups, and the list is deliberately short. Investors whose plan or mandate permits only registered investment companies. Investors who specifically want the monthly distribution alongside bitcoin exposure. And short-horizon traders using it as a listed instrument for a position measured in days, where roll cost has barely any time to bite and familiarity has some value.

Everyone else is better served by a spot fund. If you are buying bitcoin exposure to hold, the arithmetic on this page is working against you every single month, and the alternatives are collected on the full crypto ETF list and assessed in our opinionated picks. If what you actually want is bitcoin you can withdraw and control, no fund of any structure delivers that; the trade-off is set out in fund versus coin. And if you have decided on a spot fund but not which one, the practical steps are in how to buy a Bitcoin ETF.