Below is an excerpt from a commentary originally posted at www.speculative-investor.com on October 29, 2009.

The following chart shows that bank reserves held at the Fed have increased 100-fold over the past 14 months -- from around $10B in August of 2008 to around $1000B ($1T) today. It is important to understand that while this explosion in the reserves of U.S. depository institutions has rightfully prompted much discussion and consternation, it hasn't directly added to the total supply of U.S. dollars (bank reserves are not counted in monetary aggregates such as M1, M2, M3, MZM and TMS). The reason that bank reserves aren't added to the money supply is that they do not constitute money available to be spent within the economy; rather, they constitute money that could be loaned into the economy or used to support additional bank lending in the future.

Bank lending in the U.S. has declined on a year-over-year basis, so we know that the spectacular increase in reserves has not YET contributed to monetary inflation. Many analysts and economists view this as a problem, their belief being that the banking industry should support the economy by putting its excess reserves to work. To be more specific, they want the banks to lend more new money into existence on the basis that more debt is 'just what the doctor ordered' for an economy weighed down by the highest debt levels in history.

Not surprisingly, we see things differently. We think it is fortunate that banks have, to date, chosen to 'sit' on their reserves, because if they decided to use the reserves to support trillions of dollars of additional lending then the inevitable result would not only be an even more troublesome debt burden; it would also be an inflation problem of immensely destructive proportions.

Even with the decline in bank lending and the general de-leveraging that has occurred within the private sector, the government-Fed tag team has managed to increase the U.S. money supply by around 14% over the past year. If the private banks were to join the inflation party then the risk of hyperinflation would greatly increase, and hyperinflation -- leading to what Mises called a "crack-up boom" -- would be the worst of all possible outcomes. In particular, it would be an order of magnitude worse than the deflation that many people still seem to be worried about.

So, let's hope that the banks don't start lending out their excess reserves. The situation is bad enough already. 

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