A Chinese flag and a renminbi note
Beijing has in recent years opened up its financial markets to unfettered foreign inflows, mainly to gain international prestige and to promote global use of the renminbi © REUTERS

The writer is a finance professor at Peking University and a senior fellow at the Carnegie-Tsinghua Center for Global Policy

The chaos in Chinese stock markets last week was exacerbated by foreign investors selling Chinese shares, leaving Beijing’s regulators scrambling to regain their confidence while they tried to stabilise domestic markets. But if foreign funds become more cautious about investing in Chinese stocks, this may in fact be a good thing for China.

In the past two years, inflows into China have soared by more than $30bn a month. This is partly because of a $10bn-a-month increase in the country’s monthly trade surplus and a $20bn-a-month rise in financial inflows. The trend is expected to continue. Although Beijing has an excess of domestic savings, it has opened up its financial markets in recent years to unfettered foreign inflows. This is mainly to gain international prestige for those markets and to promote global use of the renminbi.

But there is a price for this prestige. As long as it refuses to reimpose capital controls — something that would undermine many years of gradual opening up — Beijing can only adjust to these inflows in three ways. Each brings its own cost that is magnified as foreign inflows increase.

One way is to allow rising foreign demand for the renminbi to push up its value. The problem, of course, is that this would undermine China’s export sector and would encourage further inflows, which would in turn push China’s huge trade surplus into deficit. If this happened, China would have to reduce the total amount of stuff it produces (and so reduce gross domestic product growth).

The second way is for China to intervene to stabilise the renminbi’s value. During the past four years China’s currency intervention has occurred not directly through the People’s Bank of China but indirectly through the state banks. They have accumulated more than $1tn of net foreign assets, mostly in the past two years.

Huge currency intervention, however, is incompatible with domestic monetary control because China must create the renminbi with which it purchases foreign currency. The consequence, as the PBoC has already warned several times this year, would be a too-rapid expansion of domestic credit and the worsening of domestic asset bubbles. 

Many readers will recognise that these are simply versions of the central bank trilemma: if China wants open capital markets, it must give up control either of the currency or of the domestic money supply. There is, however, a third way Beijing can react to these inflows, and that is by encouraging Chinese to invest more abroad, so that net inflows are reduced by higher outflows.

And this is exactly what the regulators have been trying to do. Since October of last year they have implemented a series of policies to encourage Chinese to invest more abroad, not just institutional investors and businesses but also households.

But even if these policies were successful (and so far they haven’t been), this would bring its own set of risks. In this case, foreign institutional investors bringing hot money into liquid Chinese securities are balanced by various Chinese entities investing abroad in a variety of assets for a range of purposes.

This would leave China with a classic developing-country problem: a mismatched international balance sheet. This raises the risk that foreign investors in China could suddenly exit at a time when Chinese investors are unwilling — or unable — to repatriate their foreign investments quickly enough. We’ve seen this many times before: a rickety financial system held together by the moral hazard of state support is forced to adjust to a surge in hot-money inflows, but cannot adjust quickly enough when these turn into outflows.

As long as Beijing wants to maintain open capital markets, it can only respond to inflows with some combination of the three: a disruptive appreciation in the currency, a too-rapid rise in domestic money and credit, or a risky international balance sheet. There are no other options.

That is why the current stock market turmoil may be a blessing in disguise. To the extent that it makes foreign investors more cautious about rushing into Chinese securities, it will reduce foreign hot-money inflows and so relieve pressure on the financial authorities to choose among these three bad options.

Until it substantially cleans up and transforms its financial system, in other words, China’s regulators should be more worried by too much foreign buying of its stocks and bonds than by too little.

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