BlackRock files a third bitcoin ETF built around options and cash, targeting investors who want downside buffers

BlackRock has filed for a third bitcoin exchange-traded product, this time proposing a structure designed less like a direct bet on bitcoin’s spot price and more like a vehicle meant to manage downside risk. The filing describes a new fund called PBIT, positioned for investors who want exposure to bitcoin while seeking buffers against sharp drawdowns.

According to the report, PBIT would not hold bitcoin directly through spot holdings. Instead, the fund would rely on a mix of financial instruments that include options linked to BlackRock’s existing bitcoin ETF, known as IBIT, as well as holdings in cash and short-term bonds. That design is intended to change how the fund’s returns track bitcoin, compared with products that aim to mirror bitcoin’s price more directly.

The “buffer” concept matters because bitcoin’s price has historically been prone to fast and deep moves, both upward and downward. In practice, a buffer approach usually means the fund tries to use option strategies to trade some upside potential in exchange for reduced sensitivity to certain losses. BlackRock’s filing, as described in the report, frames PBIT around that trade-off through options rather than straightforward spot exposure.

The proposed use of options on IBIT is also notable. IBIT is BlackRock’s existing spot bitcoin ETF, which itself is built around holding bitcoin and reflecting its movements. By using options on IBIT rather than owning bitcoin, PBIT would be attempting to route the bitcoin-linked exposure through derivatives, which can be tailored by strike prices, expiration schedules, and premium costs, subject to whatever the regulator ultimately approves.

BlackRock, which already dominates the U.S. spot bitcoin ETF market through IBIT, has been expanding the menu of ways investors can gain bitcoin exposure. While a “plain” spot ETF typically seeks to track bitcoin’s returns, a derivatives-based wrapper is a different proposition. It can potentially offer smoother results during volatile periods, but it also introduces complexity and costs tied to option premia and ongoing rebalancing of positions.

The report did not provide additional specifics on the option strategy’s exact mechanics, such as target buffer levels, the conditions under which the buffer applies, or how often the fund would reset its positions. Those details are usually critical for investors trying to understand how a derivatives-based ETF would perform across different market scenarios, including sudden rallies or continued selloffs.

It also remains unclear from the account of the filing what assumptions BlackRock used around costs, liquidity, and hedging, and whether the fund’s design could lead to periods when the buffer is less effective. Options strategies can behave differently depending on volatility levels, time to expiration, and the shape of the options market, so performance can diverge from a simple “downside protection” label.

For markets, the filing underscores how quickly the U.S. bitcoin ETF product space is evolving from basic spot exposure into more engineered return profiles. If regulators review and approve PBIT, it would broaden the toolkit for investors looking to hold bitcoin-linked risk while attempting to limit downside behavior. The key thing to watch next is the regulator’s feedback and any amendments to the fund’s terms, especially the disclosed option structure and the precise risk disclosures that will accompany approval.