BTC 15-minute increase of 0.60%: Spot buying pressure driven by liquidity tightness resonance

On April 30, 2026, from 13:30 to 13:45 (UTC), BTC increased by 0.60% within 15 minutes, with a price range of 76,112.1 to 76,638.3 USDT, and an amplitude of 0.69%. This increase was significantly higher than the average during other periods of the same day, indicating a notable rise in short-term market volatility.

The main driver of this movement was dominated by spot buying. On-chain monitoring showed a slight increase in net outflows of BTC from exchanges during this period, while stablecoin reserves rose simultaneously, indicating new funds entering the market for spot purchases. Continuous net inflows into ETFs and institutional investors increasing holdings through spot channels directly boosted spot demand, forming active buying pressure.

Additionally, the market depth decreased, amplifying price sensitivity. BTC market depth has fallen over 30% from its October 2025 peak, with order book liquidity tightening, causing moderate-sized buy orders to trigger rapid price increases. On-chain tracking revealed large addresses engaging in spot buying, with whale accumulation further amplifying volatility. Meanwhile, implied volatility in the options market remained low at 35-40%, and futures markets showed no signs of large-scale forced liquidations, indicating overall stability in derivatives markets without leverage-driven crashes.

Current liquidity risks require ongoing attention, as large buy orders could still trigger sharp price swings before market depth recovers. Future monitoring should focus on the sustainability of ETF fund flows, changes in whale behavior on-chain, and liquidity recovery, remaining vigilant against price distortions under low liquidity conditions.