According to CoinMeta, US spot Bitcoin ETF saw a net outflow of $462.7 million last week, ending three consecutive weeks of capital inflows, while Ethereum ETF managed to attract $196.9 million in new funds against the trend. Despite the significant outflow, Bitcoin ETF still maintained a net inflow of about $307.3 million in September. The price of Bitcoin traded at around $77,900 on Monday and failed to sustain its recent rebound. Meanwhile, Ethereum ETF experienced uneven capital flows during the same week, attracting $216.4 million on Friday. The market is facing potential volatility catalysts as the Federal Reserve is scheduled to announce its next interest rate decision on September 16.