Quote from W4rl0ck:
A lot of people in finance and the asset backed stuff knew about. So the I-banks knew they were creating a ticking bomb. They couldn't have cared less since they were raking in huge $.
I went to a few presentations where guys were trying to sell the things right up to the end. It was fun hitting them with embarrassing questions they couldn't or wouldn't answer.
Buffett knew, Rogers knew. Both made it public early.