Interesting stuff from Dr. John Rutledge:
Monetary policy is a lot more than the Fed funds rate. What matters is whether the network of bank and non-bank lenders to businesses that make up the country's credit markets are functioning or not. As the chart below shows, business loans are growing like crazy.
That's important because credit markets don't work like the textbooks and macro models would have you believe. In the textbooks, investors compare the interest rate with projected returns on projects. Raising rates causes them to trim marginal projects, investment spending falls and output contracts.
The real world is not like that. In 30 years of investing and owning companies, I have never seen an investment project accepted or turned down because Fed funds rates were 1% higher or lower. But I have seen plenty of projects cancelled and businesses shrunk because the credit markets imploded. It is the availability of loans, not the posted interest rate, that matters.
Monetary policy has its principal impacts on the economy not by moving the economy from one equilibrium point to the next, like in the textbooks, but by causing sudden, discontinuous changes, or "blackouts", in credit availability.
The credit market is a communications network, no different from an electricity grid. Normally, credit markets function well. But, from time to time, a policy disturbance causes the network to "black out." During these times, the credit market is far away from equilibrium and recorded prices (interest rates) are not a good metric for incremental borrowing costs.
I have little to add to this, but it's worth reading the whole thing.
Update: For more unorthodox economic thinking about interest rates, check out this old Marginal Revolution post about economist Fischer Black, of Black Scholes fame:
Fischer Black is one of the great finance minds of the twentieth century. (Here is my recent post on the new Fischer Black biography, which you must buy.) So why did both Milton Friedman and Bob Solow scorn him as a macroeconomist? Well, Fischer pushed two (actually more) controversial claims. First, the Fed cannot influence real or nominal variables, unless traders allow it to. Second, business cycles are caused by mismatches of tastes and production plans.
If both of these were correct, Black would be the greatest macroeconomist of the century. Today we will consider the first claim...
Black's economic thought is centered around the view that all profit opportunities will be exploited. So what happens if the central bank decides to add zeros to the accounts held at the Fed?
Here is the standard account. In Black's view banks were already holding all the dollars they wished to. One reaction is for banks to borrow less money at the discount window, or perhaps borrow less from each other. Money will leave the system as quickly as it entered. Another reaction is simply for banks to sit on the new money. Prices will not go up. Alternatively, it could be argued that an indifference relation holds, and whatever people expect to happen will happen. Multiple equilibria obtain. Prices might go up, fall, or stay constant. Monetarism is then true only if people expect it to be true.
