B和C为什么是错的

问题如下：

Which of the following statements accurately reflects liquidity management for a financial institution?

选项：

A.

Investments in Treasury securities help a bank increase its risk and return profile.

B.

Stability in retail deposits over the years has enhanced bank liquidity.

C.

Central bank borrowings are relatively cheap ways for banks to stay afloat.

D.

Stressed markets can limit the effectiveness of trading book liquidation strategies.

解释：

压力市场会造成流动性挑战，那些在正常市场条件下可能行之有效的交易账簿清算策略，在市场压力条件下可能会受到严重影响。国债投资能够降低风险，但相应地预期回报也会较低。零售存款变得不再稳定，因为投资者可以轻松地将资金转移到提供更高利率的银行。向中央银行借款成本高昂，这不仅伴随着高利率，还需要承受资产折价，同时还可能向市场发出负面信号。