I want to know the answer to the following question:
When did Moody's and Standard & Poor downgrade a significant number of IndyMac's MBS bonds?
All the background I'm provided with is that "IndyMac reported that during April 2008, Moody's and Standard & Poor's downgraded the ratings on a significant number of Mortgage-backed security (MBS) bonds including $160 million of those issued by IndyMac and which the bank retained in its MBS portfolio.". Is that enough to answer the question?