The mortgage-backed securities price drop reflects the natural tendancy of people to be sloppy with other people’s money. In this case, it was primarily the mortgage brokers shoveling out other people’s money to borrowers and hedge funds asking not quite enough questions about who is monitoring the borrowers before shoveling their investors money to purchase the loans. These capitalist swashbucklers should be lionized, not villified. If the US economy is not utilizing all of its productive capacity, we need to find some way to nudge it to work harder. If prime borrowers have borrowed all the money they want, then the extra money to get the economy moving has to be lent to subprime borrowers or monetary policy will be pushing on a string like in Japan where the nominal interest rate has been zero for a while and the real interest rate negative.
So expect the extra money to go into irrational stocks or to risky borrowers. If it doesn’t go to them and Congress isn’t swift enough to write everyone another $300 check, then we will just have idle capacity. Without a housing boom, instead of an overhang of houses that would be in danger of being foreclosed, we would have fewer houses, more unemployment, lower wages and lower GDP. We should continue to figure out ways to get money into the hands of people who will spend it even if they are speculators, sub prime borrowers, exuberant speculators and intrepid entrepreneurs.
Personally, I am in favor of subsidizing all consumer borrowing so that the benefits of rate cuts don’t accrue disproportionately to creditworthy borrowers. But whether it’s health care, green cleanup, space settlement or defense that you think needs more money spent on it, to just leave capacity idle is in my opinion even worse than spending it on my last choice.