流动性危机的苗头初现，美联储缩表可能很快收官？

Group 1 - The demand for the Federal Reserve's overnight reverse repurchase agreement (RRP) tool has dropped to its lowest level in over four years, with 17 participants depositing a total of $21.07 billion [1] - The usage of the RRP tool has decreased significantly from approximately $460 billion at the end of June to the current levels, indicating a trend of declining liquidity in the financing market [3] - The balance of the RRP tool is approaching zero, which could lead to a loss of funds from bank reserves, a critical buffer for market stability [7] Group 2 - The current balance of bank reserves remains at $3.2 trillion, indicating that liquidity is still in a comfortable range despite the pressures from the declining RRP balance [7] - The Federal Reserve's asset balance is currently at $6.6 trillion, and any further liquidity scarcity may necessitate a halt to its long-standing balance sheet reduction process [8] - Market volatility in September may exert upward pressure on money market rates, potentially impacting liquidity, even as the Fed has slowed its monthly balance sheet reduction pace [8]