BTC drops 1.28% in 15 minutes: Concentrated option expirations combined with ETF fund outflows trigger selling pressure.

2026-03-27 10:30 to 10:45 (UTC), the BTC yield was -1.28%, with a price range between 66806.9 and 67771.5 USDT, and an amplitude of 1.42%. Short-term fluctuations were significant, market attention increased, and trading activity intensified.

The main driver of this anomaly was the expiration of quarterly options in the derivatives market, with a concentrated scale reaching $1.416 billion, involving open interest accounting for nearly 40% of the entire platform. As the “maximum pain point” for options was higher than the spot market, institutions and market makers conducted large-scale “delta hedging” to balance their exposure, leading to a rapid release of selling pressure in an environment of insufficient spot demand, causing short-term downward corrections in spot prices. Additionally, the outflow of ETF funds continued, structural buying weakened, and the lack of support in the spot market further amplified the selling pressure.

Furthermore, on-chain data shows that the net outflow of BTC from exchanges was slightly dominant, with institutions preferring to transfer assets out to avoid short-term volatility. The inflow of stablecoins was not significant, and new funds were limited, failing to fill the liquidity gap in spot demand. At the same time, market sentiment shifted to defense, risk appetite declined, and short positions in the futures market increased, raising short-term volatility. In terms of the macro environment, global liquidity was relatively tight, and risk-averse sentiment did not effectively drive BTC buying, also causing an imbalance in supply and demand in the spot market, resonating with the structure of derivatives and driving this round of decline.

Current attention should focus on the open interest in derivatives, the flow of ETF funds, and the hedging behavior of market makers, as well as on-chain capital flows and the macro liquidity environment; if the future expiration scale of options and ETF redemptions continue, short-term risks may intensify. It is recommended to closely monitor BTC’s key support levels and market capital dynamics, remain vigilant for further extreme fluctuations, and obtain more real-time market information to manage trading risks.