根據 Farside Investors、CoinGlass 和 SoSoValue 彙總的 ETF 資金流數據，美國掛牌的現貨比特幣交易所買賣基金（ETF）在 5 月 25 日合計錄得約 3800 萬美元的淨流入。該交易時段顯示機構需求在經歷動盪後出現小幅回升；此前 5 月曾有多個交易日出現大規模資金外流。比特幣在整個交易時段內大致交易於 78,000 美元至 79,000 美元區間，交易者在追蹤美國公債殖利率、通膨預期以及機構在各數位資產市場的部位配置。最新的 ETF 數據出現在 2026 年加密投資產品中最具波動的月份之一之後；5 月上半月較早時段曾錄得單日超過 6.45 億美元的資金外流，隨著公債殖利率走高及宏觀經濟不確定性升溫，壓制了機構對風險資產的偏好。
Bitcoin ETF Flows Show Mixed Signals Across Major Funds
BlackRock's iShares Bitcoin Trust (IBIT) led inflows during the session, attracting roughly $24 million in new capital. Fidelity's Wise Origin Bitcoin Fund (FBTC) added approximately $11 million, while smaller inflows were recorded across Bitwise's BITB and VanEck's HODL products. Grayscale's GBTC continued experiencing redemptions, though at a significantly slower pace than earlier in the month.
Despite recent volatility, cumulative inflows into spot Bitcoin ETFs remain historically strong. U.S. Bitcoin ETFs attracted approximately $2.44 billion in net inflows during April, marking the sector's strongest monthly performance of 2026. Total assets under management across U.S. spot Bitcoin ETFs remain above $100 billion despite recent outflows. BlackRock's IBIT continues dominating market share within the sector, while Fidelity's FBTC remains one of the largest institutional Bitcoin investment products globally.
Institutional Capital Anchors Bitcoin Market Structure
Market participants increasingly view ETF flows as one of the most important drivers of Bitcoin price formation and institutional sentiment. Since the launch of U.S. spot Bitcoin ETFs in early 2024, institutional capital allocation has become a central component of crypto market liquidity and directional momentum.
ETF inflows have become structurally important because Bitcoin's post-halving issuance rate has fallen significantly following the April 2024 halving event. Approximately 450 new BTC are mined daily under the current issuance schedule, meaning sustained ETF demand can absorb newly created supply relatively quickly.
Institutional investors have also continued expanding crypto exposure through corporate treasury strategies, tokenized asset infrastructure, and derivatives markets. These overlapping demand channels have fundamentally changed Bitcoin market structure compared with earlier retail-driven cycles. At the same time, macroeconomic conditions continue weighing heavily on short-term sentiment, with investors focused on Federal Reserve policy expectations, inflation data, and global bond market volatility.
以太坊 ETF 持續落後於比特幣產品
雖然 5 月 25 日比特幣 ETF 資金流出入在小幅程度上趨於穩定，以太坊相關產品仍持續表現不佳。美國現貨以太坊 ETF 在該交易時段錄得約 4200 萬美元的淨流出，延續了機構對以 ETH 為主的產品需求偏弱的更廣泛趨勢。
以太坊較弱的資金流部分被歸因於受規管 ETF 架構內「質押」整合持續不確定的影響。多家發行商仍在尋求批准可啟用質押的以太坊 ETF 產品。隨著機構投資者愈加將比特幣定位為主導的宏觀數位資產配置，2026 年以比特幣與以太坊 ETF 資金流之間的差距持續擴大。以太坊在代幣化與去中心化金融基礎設施方面仍維持強勢布局，但 ETF 需求相較於比特幣產品仍落後。
