截至12月31日当周，美联储贴现窗口贷款为96.6亿美元

Group 1 - The core point of the news is that the Federal Reserve's discount window loans decreased to $9.66 billion as of the week ending December 31, down from $9.87 billion in the previous week [1] Group 2 - The reported figure of $9.66 billion indicates a decline in borrowing from the discount window, which may reflect changes in liquidity needs among financial institutions [1]