During a time of uncertainty, why might a bank sell some of its risky assets? What might

Question:

During a time of uncertainty, why might a bank sell some of its risky assets? What might it do with the funds it gets from the sell off?
Moody’s credit rating agency says two of France’s biggest banks are holding too much risky Greek government debt. Another French bank escaped a downgrade by selling *70bn of investments in risky yacht and jets-leasing businesses.