Root Causes of Financial Bubbles

All financial bubbles, subprime included, start when the banking system is awash with liquidity (money). Then, the question one must ask is who or what provides the liquidity to the economy in the first place? From your course in Macroeconomics, you learned the answer to that question as being the Federal Reserve System. Therefore, the Fed initiates any financial bubble through increasing reserves (money) to the banking system, which in effect will lower interest rates. Then, banks, which now find themselves with additional reserves, will do what they are in business to do; and, of course, that is to make loans, i.e., mortgages. Because of low interest rates, which is caused by the increase supply of reserves, individuals are more than happy to borrow money, in this case, for that new home or refinance their current home and draw down any home equity that is available.

Another question to ask is why and when did the Federal Reserve increase reserves to the banks? The Fed started its current monetary expansion program after the last recession, 2002. The Fed realized that since the consumer is such an important component of GDP, something like 71%, it needed a catalyst to stimulate the economy. The consumer was that catalyst. By providing and injecting reserves to the banking system, the Fed knew that the desired outcome of GDP growth would occur through the assistance of the banking system and individual borrowers. However, this contrived real estate bubble has finally burst, as all bubbles do, and the consequences are going to be felt for many years to come. The Fed's solution will be to simply reinflate the economy and create another bubble.

What I find interesting about this current subprime mess is that no one or a very small fraction of the financial world is looking at the Fed as the real culprit or villain. However, I do hear that the subprime mess is the fault of mortgage banks, credit agencies, and hedge funds. But I firmly believe that these entities are not the "root" cause of the problem. For that, simply look at the Federal Reserve and its expansionary monetary policies.

By the way, the chart from my post of September 3, which was entitled, “Picture is Worth a Thousand Words,” is that of the Money Supply. The chart can be accessed at the following URL: http://research.stlouisfed.org/fred2/series/MZMNS.