为什么要less the amount of daily average vault cash held

问题如下：

The following statements are about the legal reserves, which of the following statements is wrong?

选项：

If total legal reserves held are greater than required reserves, the institution has excess reserves. Invest any excess reserves to earn additional income.

If calculated required reserve figure exceeds total legal reserves held, the bank has a reserve deficit. Cover this deficit by acquiring additional legal reserves.

Maintain that required legal reserve on deposit with the Federal Reserve bank (less the amount of daily average vault cash held), on average, over a 14-day period stretching from a Thursday through a Wednesday (maintenance period).

Daily average amount of deposits and other reservable liabilities are computed using information gathered over a 1-week period stretching from a Tuesday through a Monday a week later (Reserve computation period).

解释：

考点：对Legal Reserves and Money Position Management的理解

答案：D

解析：

选项D错误，应该是2-week period。选项D改成正确的表述后为：

Maintain that required legal reserve on deposit with the Federal Reserve bank (less the amount of daily average vault cash held), on average, over a 14-day period stretching from a Thursday through a Wednesday (maintenance period).