BTC drops 0.52% in 15 minutes: options expiration pressure and institutional fund outflows converge, triggering a short-term sell-off

Between 13:00 and 13:15 UTC on June 1, 2026, the BTC price sharply dropped 0.52% within 15 minutes. The price ranged from 71,725.4 to 72,232.6 USDT, with a volatility of 0.70%. Market fluctuations intensified, and traders are watching the combined effect of month-end options settlement and institutional fund flows.

The main driver behind this move is options expiry pressure. In early June, large multi-billion-dollar options contracts expired. Technical resistance near the upper band triggered automated selling programs. Derivatives traders closed positions into month-end, while market makers adjusted delta exposure, increasing selling pressure. This, combined with stop-loss triggers near technical resistance levels, created a short-term selloff loop.

In addition, continued net outflows from ETFs further intensified the downside momentum. In May 2026, net outflows from Bitcoin spot ETFs reached $2.3 billion, setting a 2026 record, and also the steepest outflow since November 2025. On-chain data shows that the number of whale addresses holding more than 1,000 BTC fell from a peak of 1,285 on May 22 to 1,279 on May 28, a reduction of at least 6,000 BTC (about $440 million). Net holdings by long-term holders decreased by 7.69%, from 42,301 BTC to 39,049 BTC, indicating that even the most steadfast holders are quietly trimming. Regulatory uncertainty added further pressure: DeFi compliance directives led some institutional trading desks to temporarily reduce risk exposure, and delays in the CLARITY Act legislative progress also affected institutional allocation intentions.

On the technical side, BTC broke below a key prior support level. If 70,342 dollars is lost, the 68,348 dollars target level will be exposed (about a 7% decline from the current price). Watch whether 73,869 dollars is reclaimed and monitor ETF fund flow direction.