Martin Wolf commentary:

Can the Fed head this danger off? In a subsequent piece, Prof Roubini gives eight reasons why it cannot***. (He really loves lists!) These are, in brief: US monetary easing is constrained by risks to the dollar and inflation; aggressive easing deals only with illiquidity, not insolvency; the monoline insurers will lose their credit ratings, with dire consequences; overall losses will be too large for sovereign wealth funds to deal with; public intervention is too small to stabilise housing losses; the Fed cannot address the problems of the shadow financial system; regulators cannot find a good middle way between transparency over losses and regulatory forbearance, both of which are needed; and, finally, the transactions-oriented financial system is itself in deep crisis

Wolf refers to Roubini and his dire warnings about the US economy. Click on both links, the RGE Monitor site is must read, he is now saying housing prices will drop 30%, not 20%.