Or, rather, it almost certainly held at least 70% of its reserves in in June 2005. At the end of June 2005, China’s reserves – counting reserves transferred to the state banks – were around $770b. China’s holdings of US securities totaled $527b (68% of the total) at the time, according to the latest US survey data.
And the survey only covers China’s holdings of US securities. It leaves out China’s dollar bank accounts – so presumably China had slightly higher dollar holdings at the time. Consequently, it represents a lower limit on China’s dollar holdings. So I would say that China held at least 68% of its reserves in dollars – and probably more — in the middle of 2005.
More importantly, the survey data tells a very different story about the scale of Chines financing of the US than the story than emerges just from the TIC data. Since 2004, the TIC "flow" data has consistently suggested that a very low fraction of China’s reserve increase – maybe 40% — was going into US securities.
For example, between June 2004 and June 2005, according to work that Casson Rosenblatt of RGE has done, China’s reserves increased by around $240b. During that period, Chinese purchases in the TIC data totaled $97b (exactly 40% of the increase in US reserves). But if you look at the change in Chinese holdings between the End-June 2004 survey and the End-June 2005 survey, a very different story emerges. China’s holdings of US securities – according to the survey data – increased by $186b (78% of the increase in China’s reserves).
The TIC data tells one story. The survey data quite another.
That isn’t atypical. The data are collected in different ways. And both data sets have problems The TIC data comes from data on transactions, and thus is a good measure of flows. But it sometimes gets the buyer wrong. The survey data is a measure of the stock of US debt held abroad. It sometimes does a better job of tracking the ultimate owner of US debt than the TIC data. The TIC wouldn’t, for example pick up the People’s Bank of China’s purchase of a US treasury bond held by a German pension fund, while the survey data, in theory, would. But, as Daniel Gros has noted, the survey data also seems to miss some foreign holdings of US debt – not everyone seems to want to report everything.
In this case, though, the story in the survey data makes a bit more sense. China is big and it pegs to the dollar, so if it really shifted away from dollar reserves, it presumably would put quite a bit of pressure on the euro/ dollar – and thus on the RMB/ euro.
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