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From 1980 until the spring of 2002, 10-year Treasury note yields held a positive
correlation with the CRB index. Since 2002, however, there has been a dramatic
divergence between Treasury yields and commodity prices. This trend is unsustainable
in the long term because bond yields must eventually reflect rising inflationary
pressures and at some point offer a positive real after-tax return.
There can be only two possible conclusions reached when viewing this disparity,
shown in the chart below. One is that commodity prices are no longer an indication
of inflationary pressures, a ridiculous contention that cannot be taken seriously.
After all, the CRB Index contains 19 commodities that include precious metals,
base metals, agriculture and energy, broad measures of the pricing pressures
that exist in today's economy.
The other conclusion-the right one, in my estimation-is that Treasury securities
are grossly overvalued.

Source: Bloomberg
[The 15-year chart above shows the close relationship that existed between
10-year yields (shown above in white) and the CRB index (green) from November
1993 into 2002. The decoupling since that time can clearly be seen here.]
Today's disparity between rising bond prices and inflation are likely the
result of bondholders' fears of holding any debt not backed by the full faith
and credit of the U.S. Government, but this is a not a disparity that should
be able to continue indefinitely. After all, even according to the "official" inflation
measure-the Consumer Price Index, which likely understates inflation-buyers
of 10-year treasuries are currently getting a negative real return to the tune
of nearly a full 1%!
History is clear that we should look for a reversion to the mean, either via
a dramatic downward break in commodity prices, a sharp increase in Treasury
bond yields or some combination of the two. It is my belief that the continued
actions undertaken by the Fed to re-liquefy the banking sector will engender
a further increase in inflation pressures and send commodity prices higher
still.
As a result, the most likely outcome in this scenario is for a collapse in
bond prices as opposed to a dramatic retrenchment in commodities.
In the current economic environment, rising interest rates would exacerbate
the decline in home prices and restrict credit availability even further, thus
the Fed will be unable to hike rates until any economic recovery is well underway.
So, despite the incessant claims over the last few days that commodities are "in
a bubble," the risk of falling bond prices far outweighs the risk of falling
commodity prices.
While it may be true that commodities are a little overbought on a short-term
basis, today's real bubble exists in the bond market.
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