In attempting to stimulate risk appetite by taking “safe” assets out of the market, the Fed has actually achieved precisely the opposite of stimulating productive investment. First, it has turned bond markets into a race to the bottom as bond flippers end up piling into the very assets that the Fed is trying to discourage ownership of — because who care about low yields when the Fed will jump in at an even lower price floor, thus assuring the bond flippers a profit? Second it has energised other safe asset markets (such as gold) as longer term investors look for alternatives to preserve their purchasing power in the context of a global economic depression.
The Fed is firing at the wrong target; the real problem — the thing that is causing investors to scramble for safe assets — is an economic depression brought on by (among other non-monetary causes) the deleveraging costs of an unsustainable debt bubble. Without addressing the problem of excess total debt — and quantitative easing aims to increase lending — the Fed is firing blanks.
However, there seems little prospect that the Fed will listen to the debt-watchers who actually predicted the crisis. The likelihood is that the Fed will continue to attempt to take safe assets out of the market. And after treasuries, what will the Fed try to take out of the market?