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On spillovers and the case against giving in to trilemmas

As regular readers know, I ‘ve been thinking for some time that there are good reasons to favor some  restrictions on capital account convertibility. I’ve expressed these views here in bullet points, http://rajakorman.tumblr.com/post/102531405985/niip-sustainability-and-the-case-for-capital, and in longer form here http://rajakorman.tumblr.com/post/84527845240/on-spillovers-exchange-rates-and-monetary. I’ve dealt with these issues primarily from the point of view of the domestic economy (especially in the first, shorter post), but now, I’ve also gotten to thinking about this from the point of the international economy and wider spillovers, particularly when it comes to China and the potential ill-effects of demanding full capital account convertibility from China at this particular point in the local and international cycle.  This post also picks up on some of the excellent arguments made by @Hcmacro here https://ello.co/horatius_cocles/post/xOnNchXW8jZuR1k59_NmDw.

So here goes.  China seems to be in a place where it has been before, particularly during the Asian crisis of 1997-98. You have an economy in which considerations of external balance (the current account and the NIIP) do not make a strong case for significant exchange rate weakness. However, considerations of internal balance, specifically, the prevalence of acute disinflationary/deflationary pressures (slowing NGDP grpwth in an economy that has recently taken on a lot of debt) suggest a strong need for monetary easing via the interest rate channel.  Meanwhile, it is possible that the financial effects of exchange rate weakness could actually tighten conditions for some portions of the economy–$ indebted borrowers, and expose the liability side of some portions of the shadow banking system susceptible to outflows of hot money. Of course, as the theory of the trilemma states, a country cannot simultaneously control both its interest rate and its exchange rate as long as it has full capital account convertibility. Now, China does not have a completely open capital account, but since a) the capital account is porous and b) China has stated that it will be opening the capital account further in coming years, it does become more exposed to the trilemma.

As a result, there is now a pretty widespread consensus that RMB will face depreciation pressure stemming from the need for lower interest rates, but opinions are divided as to the extent to which those pressures will be accommodated or fought (via reserve decumulation and/or administrative suasion) by the PBoC.  My question here is somewhat different, however. It is the question of whether or not the world is actually well-served by having a country with an immense tradeable sector, a current account surplus and a large positive NIIP be forced into nominal exchange rate depreciation when what it really needs are just lower interest rates, credit easing to clear up gummed up transmission channels, and possibly some targeted fiscal expansion. In this sense, China is arguably like Sweden on supersteroids (where I’ve been criticizing the spillovers for the rest of the EU of the Swedish fiscal/monetary mix for a long time).

I recognize that I’ve said before that it’s odd to think that China only exports deflation when it devalues its currency, when in fact, it has always been exporting deflation as long as it has experienced deflation in some portions of its tradeable goods sector (about 3 years and counting). But as I thought about, it struck me that the spillovers are likely different. If China is exporting deflation through real (but not nominal) exchange rate depreciation, it is possible that other competitor countries experience deflationary pressures too, but not necessarily depreciation pressures. The reason this distinction matters is because I think it is easier for national central banks to counter the financial stability effects of deflation (especially in cases of domestic currency indebtedness) than it is for them to control the financial stability effects of nominal depreciation in a context of foreign currency indebtedness.  Insofar as this latter worry seems to be a bigger concern afflicting some of the EM competitors of China, I think there is a case that the spillover effects of a Renminbi depreciation might be more deleterious than those of onshore Chinese deflation that is countered by the combination of monetary easing and credit easing.

If I’m right about this, this then strengthens the case I’ve already made (or I like to think I’ve made) here, http://rajakorman.tumblr.com/post/102531405985/niip-sustainability-and-the-case-for-capital, on why it is entirely rational for countries to wish to control the exchange rate and interest rate legs of monetary conditions separately.  In that post, I went over the reasons from the point of view of domestic sustainability. Here, I’m making the case that such control of exchange rate and interest rate legs also makes sense from the point of view of international spillovers. Both in cases, the conclusion is the same—it makes sense to enhance the ability of countries to do precisely that and move away from a doctrinaire insistence on full capital account convertibility. In the Chinese case, there is one very practical implication—it suggests that the US should NOT insist on full capital account convertibility as a precondition for RMB entry into the SDR. Of course, as I tweeted before, merely such an admission might get the US what it wants—a somewhat more open Chinese capital account and less (net) depreciation pressure on the RMB from that capital account.