In 2007 China recorded trade surplus at a whopping 11% of its GDP. In December 2007 People’s Bank of China (PBC) held foreign exchange reserves of 1.5 trillion USD in addition to over six hundred tonnes of gold. In December 2009 PBC held foreign exchange reserve of 2.4 trillion and about 1100 tonnes of gold. PBC had been keeping most of its foreign exchange reserves in US treasuries. Its purchases helped keep USD high and US rates low. US on the other hand have been running huge trade deficits. Pundits felt /feel that such imbalances in global economy introduce a pronounced element of instability and are undesirable.
American establishment’s (not American economists’) view has been that China must revalue its currency. Let us take a look at EER’s of USD and yuan. Nominal EERs are calculated as geometric, weighted averages of bilateral exchange rates. Real EERs are the same weighted averages of bilateral exchange rates adjusted by relative consumer prices. EERs computed by different organisations follow broadly the same principles but their arithmetic may be a little different. Difference arises on how to attach weights. For example IMF’s and BIS’s computation of REER / NEER of different currencies do not give the same numbers over same periods. This chart is drawn from REER computed by BIS.

During 1994-2010 yuan has appreciated by over 40% on REER basis whereas USD has come back to square one after rising 20% around 2001. But as mentioned above REER is computed with weights based on trades with different currency areas. The weights change from year to year and REER may show a rising / falling trend because of the changes in relative trades with different countries. Nevertheless, the popular standard (and not necessarily correct) prescription in face of rising REER is to allow the currency to depreciate. What do you say –should China depreciate yuan?
China has large trade surplus, United States has large trade deficit. Is it fair to insist on China to manage the global imbalance and not ask the US to do the same? And should the rebalancing be achieved by allowing yuan to rise against the dollar? On broad multilateral exchange rate basis, in real terms, yuan has risen by about 10% this year (2010).
What would happen if China were to sever its de facto peg with dollar? Will yuan appreciate against USD? Will it depreciate? Depreciation is not all that farfetched. Roubini has said that as yuan has risen sharply in recent months against the euro, so a stronger yuan could not be taken for granted. If the euro were to continue to depreciate, yuan would have to be allowed to depreciate against the dollar. The same views were earlier made by Li Daokui, an academic adviser to the monetary policy committee of the People's Bank of China - the yuan could depreciate against the dollar if the euro falls sharply against the U.S. currency.
There is yet another angle. China has not only kept yuan pegged to dollar, it also has very low lending and deposit rates. Such artificially low rates mean systemically robbing the households to pay to the corporates leading to low domestic consumption level. Suppose China were to increase deposit rates and allow yuan to float. Do you think it will go up substantially against USD?
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