What Is IBIT? iShares Bitcoin Trust ETF

IBIT is the iShares Bitcoin Trust ETF, BlackRock's spot bitcoin fund. It holds actual bitcoin in custody and tracks the CME CF Bitcoin Reference Rate - New York Variant at a 0.25% expense ratio. Rather than buying bitcoin on an exchange and managing a wallet, investors buy IBIT shares in an ordinary brokerage account and get exposure to bitcoin's price.

Launched in January 2024 as part of the first group of SEC-approved US spot bitcoin ETFs, IBIT grew faster than any peer and now holds roughly $75 billion, making it the largest bitcoin fund in the market. Its scale translates into deep liquidity and tight spreads, which is a big reason traders and institutions gravitate to it.

Approximate weights as of mid-2026; refresh quarterly from BlackRock iShares's fund page. Each ticker links to its individual stock guide in Walnut.

IBIT is a single-asset fund. It holds essentially only bitcoin, close to 100% of the portfolio, with a small cash balance for operations. There are no stocks, bonds, or futures contracts inside it. The bitcoin is stored in offline cold storage by Coinbase Custody Trust Company, while BNY Mellon serves as cash custodian and administrator.

Because IBIT owns bitcoin directly rather than through derivatives, its return tracks the spot price closely, minus the 0.25% annual fee. There is no monthly futures roll and therefore no contango drag, which is the structural advantage spot funds hold over futures-based products like BITO.

IBIT and Fidelity's FBTC are the two heavyweight spot bitcoin ETFs, both charging 0.25% and tracking bitcoin almost identically. The clearest difference is custody: IBIT relies on Coinbase as a third-party custodian, while FBTC self-custodies through Fidelity Digital Assets. IBIT is the larger and more liquid of the two, which can matter for active traders and large orders.

BITO is a different animal. It holds bitcoin futures rather than spot bitcoin, charges 0.95%, and can drift from spot returns because of the cost of rolling contracts. For most buy-and-hold investors seeking simple bitcoin exposure, the spot funds are the more direct tool. Which specific fund fits you is a personal decision, not a recommendation from Walnut.

IBIT's performance is simply bitcoin's performance, minus fees. That means large swings in both directions: bitcoin has delivered strong multi-year gains but also deep drawdowns, and 2026 has included a sharp pullback of more than 25% at points. Investors should expect equity-like or greater volatility and size the position accordingly.

The long-term outlook for IBIT is inseparable from the outlook for bitcoin itself, which depends on adoption, regulation, and macro conditions that no one can predict. What the ETF wrapper adds is convenience and regulatory clarity, not any change to bitcoin's underlying risk profile.

The two structural risks specific to a spot bitcoin ETF are custody and pricing. IBIT's bitcoin sits with Coinbase Custody, and a large share of all spot bitcoin ETFs use the same custodian, which concentrates counterparty and operational risk in one provider. Investors own trust shares, not the coins, so they rely on the custodian's security and the sponsor's controls.

IBIT also carries NAV premium and discount risk: the traded share price can sit slightly above or below the value of the fund's bitcoin. In normal conditions authorized participants keep that gap tiny, but during extreme volatility, exchange outages, or stress in crypto markets it can widen. These are risks that direct spot exposure through an ETF cannot fully eliminate.

IBIT suits investors who want bitcoin exposure without managing wallets, private keys, or a crypto exchange, and who want to hold that exposure in a standard or tax-advantaged brokerage account. Because bitcoin is volatile and pays no income, many investors treat a fund like IBIT as a small satellite or tactical position rather than a core holding.

Walnut is not an investment adviser, and this is not a recommendation to buy or sell IBIT. Whether it belongs in your portfolio depends on your goals, time horizon, and tolerance for large drawdowns. Connecting your brokerage to Walnut lets you see how a position like IBIT would sit alongside the rest of what you own.

IBIT trades like any stock and is available on Robinhood, Fidelity, Schwab, Public, and most major brokers, with many offering fractional shares so you can start with a small dollar amount. There is no need to open a crypto exchange account or set up a wallet.

Once you own IBIT, you can connect your brokerage to Walnut to track it alongside your other holdings, monitor how much of your portfolio is in bitcoin, and keep an eye on whether your overall allocation still matches your intended targets.

IBIT is the deepest and most liquid way to hold spot bitcoin inside a normal brokerage account, at a 0.25% fee that matches Fidelity's FBTC. It owns real bitcoin, pays nothing, and is a tactical or satellite position sized to your own risk tolerance rather than a core holding. Its main nuances are custody concentration at Coinbase and the volatility of bitcoin itself.

Whether IBIT is worth buying today depends more on your time horizon and what you already hold than on any single call. We walk through valuation, concentration, and what would have to be true for it to outperform from here in is IBIT a buy?

IBIT yields 0% as of mid-2026, paid by passing through the dividends of its underlying holdings. For the payout schedule, history, and how the distributions are taxed, see IBIT dividend: yield and schedule.