Normally,
we do not comment a specific press article. However, after the Christmas
holiday, the Wall Street Journal published an article titled “Millions of Tons of Metals Stashed in Shadow Warehouses”. The tenor of this article
is that more and more metal would be stored in hidden warehouses not licensed
by the LME and that statistics about LME warehouse inventories would be less
useful. Furthermore, the article creates the impression that holding
inventories outside of LME warehouses would be intended to manipulate the
market by banks and hedge funds.
This
article contains some errors and inconsistencies. The LME is not the only metal
exchange, which has licensed warehouses officially. As long as aluminum futures
were traded on the CME, this exchange also had licensed warehouses for that
metal and reported inventories daily. Copper inventories continue to be posted
daily on the CME website. The Shanghai Futures Exchange has also licensed
warehouses and publishes the stocks. Last Friday, these inventories were 186.7
thousand tons of aluminum. Licensing by an exchange means that these warehouses
are delivery places for the traded contracts at maturity. If a delivery is due,
the seller may deliver the metal by warehouse receipt of an official warehouse.
The buyer has no obligation to accept metal, which is not held at one of the
official licensed warehouses.
Thus, the
statistics about warehouse inventories held on warrant and cancelled warrants provides
information about which quantities are available for delivering into the
outstanding contracts, counted by the open interest. However, this is only a
daily snap-shot. These statistics do not imply that the metal available for
meeting delivery obligations in the future are limited as the inventories could
increase by delivering metals held outside the official warehouses into the
official stocks. Nevertheless, the exchange warehouse inventories provide a
good indication about the scarcities of the various base metals.
The author
writes correctly that the official warehouses of the metal exchanges are also
deposits for non-registered metal stocks. In the industry, the term
"crossing the line" is well known and expresses that through easy
transport over a certain line of separation, the metal disappears from the
statistics, although it has never left the warehouse. But if the metal has left
the "official, segregated storage area", then it is no longer
directly available for deliveries of exchange-traded contracts. Often, the
warehouses providing a financial incentive by lower storage costs to the metal
from the official to the unofficial inventory areas.
Unfortunately,
the author fails to recognize, why the unofficial stocks have risen so sharply.
Here the LME and the warehouses have a significant fault. The LME warehouses function
more like a mouse trap. It is easy to get the metal into the warehouse. But, it
could sometimes take several months for the holder of a warehouse receipt to receive
her metal from the warehouse. For this waiting period, she must bear the
storage costs also. Therefore, for consumers of these metals, the pressure has arisen
to store more metal outside the warehouses of the exchanges in order to have
the necessary flexibility to use the metal for the own production of goods. The
LME management would have to solve the problem of long queuing times at their
warehouses. Maybe the law suits filed in the US will speed-up this process.
Furthermore,
producers and consumers will always hold some inventory outside the official
warehouses. Models of inventory holding like the Baumol model also can explain
the rise of off-exchange warehouse stocks to some extend by rising global GDP
and lower interest rates due to the zero interest rate policy followed by major
central banks.
The problem
with the so-called shadow storage is an essential one for analysts, who analyze
statistics of production and consumption and derive forecasts for price
developments from this data. The production figures can be estimated reasonably
well. Sometimes this data will be published by national statistical offices.
Analysts can also poll mining companies about their production estimates.
Nevertheless, also production figures were revised even several years later and
thus, have a degree of uncertainty, which should not be neglected. However, for
consumption statistics the picture looks completely different. There are no
reliable official statistics of metal consumption. Also polling companies using
base metals as an input in the production of goods is a mission impossible given
the sheer number of companies in the metal processing industry on a global
scale.
Therefore,
statisticians apply an auxiliary construct that is referred to as apparent
consumption. The changes of the inventory holdings are subtracted from the
production and the difference is considered as consumption. Therefore the better
the actual changes in inventories are recorded, the better consumption could be
estimated. If the change of inventories is underestimated, then the consumption
is overestimated necessarily and vice versa. Thus, the disadvantage of this
approach is a high degree of uncertainty about the effective consumption of
base metals. Figures are revised still many years later. Furthermore, it is
possible that revisions of data lead to changes in the supply/demand balance by
the pen of the statisticians. It had been the case that the market had expected
a supply deficit (surplus), but final figures showed a supply surplus
(deficit).
This problem
of data revisions has considerable implications for quantitative modelling of
base metal price developments. Metal prices are based on the information available
at the time of trade. If this information is significantly different from
ex-post information used in modelling, then the estimates are distorted and
could lead to erroneous conclusions. As data about inventories in exchange warehouses
is available in a timely manner and is not subject to revisions, it is still
preferable compared to estimates of the supply/demand balance.
For some base
metals there are international organizations such as the International Aluminum
Institute or the International Copper Study Group. These institutions also
estimate the total inventory changes, whether held in private storage outside
of exchange warehouses or in public strategic reserves. They publish this
information on a monthly basis, although the statistics are published with a
usual time lag. The stocks in the warehouses of the exchanges, however, are
available the next morning.
The author
also touches the area of inventory financing. In a number of articles and
comments of analysts, the use of existing stocks as collateral for loans is
discussed. In some of these articles, the impression is created that the metals
are purchased solely to obtain a loan. This is only useful if there are
opportunities for arbitrage, which should be exploited without the use of own
funds. However for consumers the situation is different. They need to hold
stocks for current production as just in-time production is not always possible.
This inventory holding ties up capital. And since in many jurisdictions, equity
is more expensive than debt financing due to tax treatments, it makes sense to fund
the inventory holdings by a bank loan and to use the metal as collateral for
the credit. But consumers will only hold higher inventories when they expect
also an increase in demand for their products. However, normally consumers
would not hold those inventories at exchange warehouses.
For
producers, the situation is also different. If a market is in backwardation,
they can sell their production of refined aluminum or copper at the spot
market. However, if the market is in a contango situation, then it might be a
better strategy to deliver the metal into exchange warehouses and to sell the
corresponding number of futures contracts. Selling the metal in the spot market
would depress prices even further and might lead to a less favorable price for
the producer. However, if the producer needs funds, he could obtain a bank loan
against the warehouse receipt as collateral.
For many
base metals, inventories held in exchange warehouses declined from the peaks
reached in 2013. If this metal all went into the “hidden shadow warehouses”,
then the exchanges and the LME in particular should be worried and should take
measures to reverse this development. The exchanges could also demand from the
warehouses to provide figures off metal inventories outside the official zone
at those warehouses. However, with respect to the development of global PMI
indices, the decline of inventories at exchange warehouse might be more a
reflection of a stronger global economy.