The U.S. spot Bitcoin ETF market experienced a substantial net outflow of $174 million yesterday, according to AiCoin monitoring. The largest outflow was recorded by IBIT, which saw $86.5 million withdrawn, followed by FBTC with $78.6 million. AiCoin's Spot BTC ETF Tracking strategy indicates a strong positive correlation between ETF capital inflows and Bitcoin price movements, suggesting potential automated trading opportunities based on these trends.