BTC 15-minute short-term surge of 0.55%: ETF continuous inflows combined with liquidity exhaustion driving price fluctuations

Between 2026-04-22 02:00 and 02:15 (UTC), the BTC price experienced a brief upward fluctuation, with a return of +0.55%, a price range of 76,218.2 to 76,869.4 USDT, and an amplitude of 0.85%. Due to the spot market liquidity being at its lowest since November 2023, the price was highly sensitive to capital flows. Despite no significant increase in trading volume, the price still saw a slight rise, and market attention noticeably intensified.

The main driver of this fluctuation was the continuous large inflow of funds into ETFs. On April 20, 2026, net inflows into spot ETFs reached $299 million, with a single-day inflow of $471 million on April 6, the largest since February 2026. Institutions continued to absorb circulating tokens through ETF channels, becoming the dominant source of incremental capital.

Additionally, large on-chain fund outflows from exchanges provided support. Data shows that on April 21, net outflows of over $100k, totaling approximately 6,880 BTC, occurred, with large funds choosing to withdraw holdings from exchanges in anticipation of price increases, reducing short-term selling pressure. Meanwhile, weak liquidity in the spot market led to a contraction of market depth, where limited buy orders could amplify price fluctuations. Furthermore, options positions remained consistently higher than futures positions, indicating a stable derivatives market structure and overall suppressed volatility.

Risks to watch include: persistent low spot liquidity making prices extremely sensitive to unilateral capital flows; if ETF inflows slow down or large redemptions occur, prices could quickly retreat. Additionally, ETF funds are highly concentrated among a few leading institutions; if major players adjust their positions, market volatility could intensify. It is recommended to monitor ETF capital flows, exchange balance changes, and on-chain fund activities.