some people want to blame greenspan for everything, but they are just scapegoating. The Fed is just a part of the system, and ultimately the Fed is not totally independent, and not all powerfull. The only thing the fed did "wrong", if you can call it that, was save us from a stock market crash when LTCM went under by flooding liquidity. That was when the bubble really got insane. If the fed would have let nature take its course we could have had our bear market a couple of years sooner and maybe we would be coming out of it by now, but that is pure speculation.