---
title: "BlackRock seeks to shield bitcoin investors from losses after rival fund weathers 50% crash"
description: "2026-10-20にCointelegraph, The Block +3が報道。検知後24時間でBTC +1.13%。 Cointelegraph: “BlackRock’s proposed Bitcoin fund would use options to limit potential losses and gains, adding another strategy to its existing Bitcoin and Ether ETF lineup.” 検知後24時間でBTCは+1.13%変動。価格観測は因果関係を証明しません。"
language: ja
canonical: "https://whycoinmoves.com/ja/events/bitcoin-blackrock-seeks-shield-bitcoin-investors-891d8cfd4f9725"
published: 2026-10-20T14:29:57.000Z
updated: 2026-10-21T14:29:58.000Z
indexable: false
---

# BlackRock seeks to shield bitcoin investors from losses after rival fund weathers 50% crash

2026-10-20にCointelegraph, The Block +3が報道。検知後24時間でBTC +1.13%。 Cointelegraph: “BlackRock’s proposed Bitcoin fund would use options to limit potential losses and gains, adding another strategy to its existing Bitcoin and Ether ETF lineup.” 検知後24時間でBTCは+1.13%変動。価格観測は因果関係を証明しません。

Attributed sources: [Cointelegraph](<https://cointelegraph.com/news/blackrock-ishares-bitcoin-managed-protection-etf-pbit>), [The Block](<https://www.theblock.co/news/regulation/2026-10-19-blackrock-files-bitcoin-managed-protect-etf-downside-protection-ibit-421087>), [Decrypt](<https://decrypt.co/381385/blackrock-files-for-buffer-bitcoin-etf-as-ibit-draws-665m-in-a-day>), [CoinDesk](<https://www.coindesk.com/markets/2026/10/20/blackrock-seeks-to-shield-bitcoin-investors-from-losses-after-rival-fund-weathers-50-crash>), [Bitcoin Magazine](<https://bitcoinmagazine.com/news/blackrock-files-for-new-bitcoin-etf>)

## Key facts

Cointelegraph: “BlackRock’s proposed Bitcoin fund would use options to limit potential losses and gains, adding another strategy to its existing Bitcoin and Ether ETF lineup.” 検知後24時間でBTCは+1.13%変動。価格観測は因果関係を証明しません。
Evidence strength: 複数メディア報道, 5 publisher group(s) (Cointelegraph, The Block, Decrypt, CoinDesk, Bitcoin Magazine); this describes source coverage, not truth or causation.
検知後の観測リターン：5分: +0.09% (20/10/2026, 14:29 → 20/10/2026, 14:34, UTC; Gate · USDT)；1時間: -0.57% (20/10/2026, 14:29 → 20/10/2026, 15:29, UTC; Gate · USDT)；24時間: +1.13% (20/10/2026, 14:29 → 21/10/2026, 14:29, UTC; Gate · USDT)。記載のない時間枠は未取得です。
直近30日間の時間足絶対リターンの99パーセンタイルは1.23%（OKX · USDT；基準 20/10/2026, 14:29, UTC）です。時間足基準は分単位の変動と直接比較できません。

## Returns after site detection

| Window | Return | BTC | Difference from BTC | Actual sampled interval (UTC) | Source |
| --- | --- | --- | --- | --- | --- |
| 5分 | +0.09% | +0.09% | 0.00 pt | 20/10/2026, 14:29 → 20/10/2026, 14:34 | Gate · USDT |
| 1時間 | -0.57% | -0.57% | 0.00 pt | 20/10/2026, 14:29 → 20/10/2026, 15:29 | Gate · USDT |
| 24時間 | +1.13% | +1.13% | 0.00 pt | 20/10/2026, 14:29 → 21/10/2026, 14:29 | Gate · USDT |

## Historical hourly baseline

| Metric | Value |
| --- | --- |
| Ready | true |
| Coverage | 100.0% (720/720) |
| Median absolute hourly return | 0.15% |
| 99th percentile of absolute hourly returns | 1.23% |
| BTC beta | 1.00 |
| Source / cutoff (UTC) | OKX · USDT / 20/10/2026, 14:29 |

## Claims and open questions

- No independently verified causal explanation is available.

## Source evidence

- [BlackRock files for third Bitcoin ETF, still no Solana or XRP](<https://cointelegraph.com/news/blackrock-ishares-bitcoin-managed-protection-etf-pbit>) — Cointelegraph; published 20/10/2026, 08:12; received 20/10/2026, 08:20 (UTC).
- [BlackRock files for bitcoin ETF offering downside protection and upside exposure to IBIT](<https://www.theblock.co/news/regulation/2026-10-19-blackrock-files-bitcoin-managed-protect-etf-downside-protection-ibit-421087>) — The Block; published 19/10/2026, 22:00; received 20/10/2026, 08:55 (UTC).
- [BlackRock Files for 'Buffer' Bitcoin ETF as IBIT Draws $665M in a Day](<https://decrypt.co/381385/blackrock-files-for-buffer-bitcoin-etf-as-ibit-draws-665m-in-a-day>) — Decrypt; published 20/10/2026, 09:13; received 20/10/2026, 09:16 (UTC).
- [BlackRock seeks to shield bitcoin investors from losses after rival fund weathers 50% crash](<https://www.coindesk.com/markets/2026/10/20/blackrock-seeks-to-shield-bitcoin-investors-from-losses-after-rival-fund-weathers-50-crash>) — CoinDesk; published 20/10/2026, 14:28; received 20/10/2026, 14:29 (UTC).
- [BlackRock Files for Bitcoin ETF With Downside Buffer and Capped Upside](<https://bitcoinmagazine.com/news/blackrock-files-for-new-bitcoin-etf>) — Bitcoin Magazine; published 20/10/2026, 16:26; received 20/10/2026, 16:31 (UTC).


## Recent BTC events and market reactions

公開基準を満たした他のBTCイベントはまだありません。

- [Full coin archive](<https://whycoinmoves.com/ja/coins/bitcoin>)

## 他銘柄の直近の価格急変動イベント

- [ZEC: ZECはなぜ1分で0.74%下落したのか？根拠・市場データ検証 · 2026-10-23](<https://whycoinmoves.com/ja/events/zcash-move-1792720080>)
- [SHIB: SHIBはなぜ1分で0.74%上昇したのか？根拠・市場データ検証 · 2026-10-23](<https://whycoinmoves.com/ja/events/shiba-inu-move-1792719780>)
- [ADA: ADAはなぜ5分で1.60%下落したのか？根拠・市場データ検証 · 2026-10-22](<https://whycoinmoves.com/ja/events/cardano-move-1792687800>)
- [価格急変動](<https://whycoinmoves.com/ja/topics/market>)

## Research for this archive

- [Altcoin beta to Bitcoin: BTC, ETH, SOL and DOGE hourly returns](<https://whycoinmoves.com/ja/research/hourly-returns-and-bitcoin-beta.md>)
- [Perpetual funding rates and annualized yield: a 2025 comparison](<https://whycoinmoves.com/ja/research/funding-rates-versus-investor-returns.md>)
- [Bitcoin halving and bull markets: evidence from four halvings](<https://whycoinmoves.com/ja/research/bitcoin-halving-and-market-cycles.md>)
- [Bittensor (TAO): Bitcoin beta, volatility and the AI crypto narrative](<https://whycoinmoves.com/ja/research/tao-bitcoin-risk-and-ai-narrative.md>)

[Methods and limitations](<https://whycoinmoves.com/ja/methodology>)
Publisher count is not independent evidence count. Price changes cannot verify news or prove causation.