Crypto

BlackRock Files for Bitcoin ETF With Built-In Downside Protection

BlackRock filed on Oct. 19, 2026, for an iShares Bitcoin Managed Protect ETF that would offer capped upside to IBIT with a level of downside protection.

Oct 21, 2026 - 12:24

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BlackRock, the world's largest asset manager, has filed with the U.S. Securities and Exchange Commission to launch a bitcoin exchange-traded fund designed to limit losses while offering a capped share of gains. The proposed iShares Bitcoin Managed Protect ETF was filed on Monday, October 19, 2026, The Block reported.

What the filing describes

"The Fund seeks to provide upside exposure to the iShares Bitcoin Trust ETF (IBIT) and/or similar bitcoin exposure up to an approximate limit, while seeking to provide a level of downside protection," BlackRock said in the filing, as quoted by both The Block and CoinDesk. The fund would be built around BlackRock's flagship spot bitcoin product, the iShares Bitcoin Trust, which holds more than $65 billion in assets and is the largest fund of its kind.

CoinDesk reported that the filing did not specify how much downside protection the proposed fund would provide or how much of bitcoin's upside investors could capture. The filing is a registration step; the fund has not been approved and is not trading.

BlackRock's expanding bitcoin lineup

BlackRock launched IBIT in January 2024. In June 2026, it introduced the iShares Bitcoin Premium Income ETF (BITA), which, according to CoinDesk, holds bitcoin and IBIT shares while selling call options on roughly 25% to 35% of its portfolio to generate monthly income. Bloomberg Intelligence analyst James Seyffart noted in a post on X that the new filing is BlackRock's third bitcoin ETF filing, and that the firm still offers crypto products tied only to bitcoin and ether, The Block reported.

A structure already in the market

The concept is not new. CoinDesk reported that Calamos Investments launched its first three protected bitcoin ETFs in early 2025, offering options ranging from full downside protection to funds that cap losses at 10% or 20% over a set period. Calamos invests roughly 90% of those funds' assets in U.S. Treasuries and uses the remainder to buy bitcoin-linked options, which allows holders to participate in gains up to a cap while limiting losses over a defined period.

According to a Calamos spokesperson cited by CoinDesk, the firm's Bitcoin Structured Alt Protection ETF – October (CBOO) declined just 1% from the start of its one-year protection period in October 2025, while bitcoin fell as much as 52% from its record high of roughly $126,000 over that span.

Where bitcoin is trading

The filing arrives with bitcoin well below its peak. Bitcoin opened at $82,940.14 on Wednesday, October 21, 2026, up 1.3% from Tuesday's open, and rose to $83,292.55 by 7:21 a.m. ET, Yahoo Finance reported. Yahoo Finance put bitcoin's all-time high at $126,198.07, set on October 6, 2025, and said Wednesday's opening price was about 25% lower than a year earlier.

Ether opened at $2,446.67 on Wednesday, up 1.7% from Tuesday's opening price, and was about 38.5% below its level a year earlier, according to Yahoo Finance.

Other industry developments

The Block's news feed on Wednesday also listed reports that Grayscale had expanded in-kind subscriptions to 10 of its crypto ETFs and trusts, and that Standard Chartered had signed definitive agreements to acquire digital-asset custodian Zodia Custody.

Key facts

Proposed fund: iShares Bitcoin Managed Protect ETF, filed with the SEC on October 19, 2026
Reference asset: iShares Bitcoin Trust (IBIT), more than $65 billion in assets
Protection and cap levels: not disclosed in the filing, per CoinDesk
Status: proposed; not approved or trading