According to Greenspan, Fannie Mae and Freddie Mac were to blame for the housing bubble. The Fed may have noticed, but it couldn’t really do anything about it. "Regulators cannot successfully use the bully pulpit to manage asset prices, and they cannot calibrate regulation and supervision in response to movements in asset prices. Nor can they fully eliminate the possibility of future crises,” said Greenspan.
After that self-serving drivel, no wonder the God’s zapped the electrical system. There was a lot Greenspan could have done to rein in the housing bubble, not the least of which was simply telling people there was a bubble as housing prices began following an unprecedented and unsustainable path.