Being wrong seems to be habit forming with you. The housing bubble was created by the investment banks that found a goldmine in securitizing mortgages. Their appetite for mortgages proved insatiable, so it became necessary to lie, cheat and steal to keep the beast fed. The Greenspan Fed's only role was to do nothing, so it would be giving that stand-by-and-watch Fed far too much credit to say they created the housing bubble. If in your pea-sized brain you want to blame Mr. Greenspan's insouciance when he had the power to stop the insanity, fine, but there is no way that the Fed "created" the bubble. The mortgage money was fed by securitizing, and the popularity of the securitized and "tranchefied" mortgages, driven to wild extremes by the ease with which the I.B.s could hawk them. [When Salomon Bros. and First Boston invented securitized mortgages during Reagan's presidency, the amount of mortgage money available grew almost ten-fold, and nearly overnight!] The Fed's only role was to do nothing -- Nothing at all! Greenspan, a firm believer in laissez faire business and banking, ignored what was happening in the mortgage market. Ignored it! He assumed, because he had read Ayn Rand with too much enthusiasm, that the market would take care of the problem in a relatively harmless way. Well the market did take care of the problem, but by no means in a harmless way!
And now you, yes you with the pea sized brain, want to ignore the genius of an entirely different Fed, a Fed led by the brilliant, Ben Bernanke. You should thank your lucky stars that it wasn't the insouciant Mr. Greenspan in charge when all those liar loans came home to roost.