I want to know the answer to the following question:
For what reason did Moody's Investor Services downgrade nine Portuguese banks in 2011?
All the background I'm provided with is that "On 6 April 2011, after his proposed "Plan for Stability and Growth IV" (PEC IV) was rejected by the Parliament, Prime Minister José Sócrates announced on national television that the country would request financial assistance from the IMF and the European Financial Stability Facility, as Greece and the Republic of Ireland had done previously.". Is that enough to answer the question?
Answer: no