Er Federal Reserve ansvarlig for aktieopturen via manipulation?

"One way to manipulate the stock market would be for the Fed or the Treasury to buy $20 billion of S&P 500 stock futures (afterhours) each month. Depending on margin levels, $20 billion per month would translate into at least $100 billion in notional buying power per month - virtually all of the market’s upside since mid-September has come from after-hours S&P 500 futures activity"