|
Peso and yen are rescued by a friend, |
Yuan has become stronger in three years amid tariff debate[1]. What is interesting is that there is conspicuous absence of Chinese central bank intervention to depreciate Yuan deliberately. It often happened in the past. Undervalued Yuan has always been an issue raised by the USA in bilateral talks. Since president Trump's last visit to China, we have not seen yet any Chinese intervention to devalue the Yuan. Appreciation of Yuan is at the heart of reshaping the global trading system.
Economist Stephen Miran, who is one of Fed's governors, argues in his policy paper titled "A User's Guide To Restructuring The Global Trading System" ( published by Hudson Bay Capital in November 2024) offers some tools to reshape global trading order[2]. One of the tools is tariff. Tariff will help addressing the budget deficit America suffers and make depreciation of Yuan untenable. Miran argues tariff will not drive up the prices if the tariffed /exporting country depreciates its currency to the full magnitude of the tariff. Tariff is not inflationary for America in this case. Usually individuals, other countries buy foreign assets with their foreign currency holdings. US treasury assets are one of them. China has a closed capital market and Chinese govt restricts investment abroad. So holders of foreign currency in China are forced to invest in less productive and risky assets like real estate that accumulated huge bad debt. Miran argues continuing currency devaluation under capital controls will not sustain amid high tariffs. So there will be great capital flight from China. And it will force the Chinese central bank to raise interest rate , leading to appreciation of Chinese currency. The plus side of tariff war is that the US govt will get revenue without incurring the inflation. However, the US may lose revenue if the partner country does not depreciate the currency and an ensuing inflation may be expected.
So far we have seen that the US Supreme Court made the US tariff useless and ordered to refund $100 billion tariff revenue. However, reciprocal tariff is replaced by forced labor tariff under trade act that allowed the US president to do so. Tariff reality still prevails. Yuan depreciated immediately following the months tariff came into affect. But it started to appreciate since then. Meanwhile, US dollar weakened till the US-Iran war broke out.
Another tool Miran advocates is the currency tool. It has two approaches: the multilateral approach and the unilateral approach. In the multilateral approach, the US sits with major trading partners and convince them to appreciate/strengthen their currencies and to depreciate/weaken the USD. This starts to happen when they start to sell USD from their forex reserve. The US starts to buy those dollars and issues new treasury security with duration of 100 years. In addition, the US sells those bonds to friendly countries who need security assistance in troubled waters and territories. By the way, the century bonds will replace the short and medium term bonds,easing the burden of the Fed to make huge interest payments and improving the budget deficits. Here the US projects the global security assistance as public good. And buying the century bond ,you are actually paying for that public good. In addition, holders of the century bond will enjoy favorable tariffs in the US market while the hostile partner will face a different kind of tariff. This multilateral currency approach has a precedent. In 1985, the US,France,UK,Germany and Japan met at the Plaza hotel and agreed to devalue the USD.
The unilateral approach reveals the leverages the US has to reshape the global trading system.It emerges when multilateral approach fails(many countries do not give consent to devalue dollar). One of the leverages is the International Emergency Economic Powers Act 1977 that allows the US president to halt and limit transfers of credit, payments or securities internationally. The US could hold part of the interest payments on treasury security in a bid to make USD unattractive for using it as reserve currency. This will lead countries to lower the size of their USD holdings, creating a depreciation pressure on USD.
Another leverage is the reserve accumulation,which means the US will buy other currencies in a bid to increase the demand of other currencies provided that the Fed prints and supplies the much needed USD.
Like tariff, currency tool has already been employed.In October 2025, we saw the USA announced a currency swap line worth $20 billion to rescue the Argentine peso ,halting depletion of forex reserve of the Argentine central bank. The US treasury secretary urged US banks and investment funds to invest more in Argentina. This is the first time,[reserve accumulation] is employed in tariff debate. This time it is used to rescue an ally Argentina to curb influence of China,which has also given a $18 billion currency swap line with the Argentina. Earlier, Argentina had chosen refurbished F-16 over JF-17 and J-10C offered by China for its Air Force. Here security is being projected as public good and currency is used to aid ally through security umbrella[3].
A week ago US Federal Reserve intervened again to rescue Japanese Yen. Yen witnessed huge depreciation pressure, but Fed's purchase of $8 billion of Japanese Yen helped the Japanese currency to gain some value. Earlier US intervention took place in 2011 after earthquake and tsunami in Japan[4].
Now think there comes a moment when this same reserve accumulation of the currency tool is being used to punish behavior of a rival. In fact, Federal Reserve governor Stephen Miran depicted such scenario in his paper where the US govt requests the Fed to print $1 trillion in a bid to purchase Yuan so that it appreciates .
However, recent appreciation of Yuan does not reflect that reality. It is merely a consequence of internal dynamics that the Chinese regulatory authority allowed to happen.
So far we witnessed that tariff and currency tools of the trade debate is applied. In terms of revenue, tariff may fail to bring some change but it shaped several Free Trade Agreements. At the same time, use of currency tool stalled free falling of several currencies and consolidated few security agreements. It is true that tariff debate gave rise to trade related uncertainties and hiked inflation in some parts. And in future,reserve accumulation may be employed by big trading partners for harmful purposes. We have to be cautious of intentional use of major currencies to influence other currencies through currency tool.
References:
[1] "Yuan Hits Strongest Levels In Years As Tensions Grow", The Star,August 06,2026,
https://www.thestar.com.my/business/business-news/2026/08/06/yuan-hits-strongest-level-in-years-as-tensions-grow
[2]"Reshaping Global Trading System: What Lies Ahead",https://hoquestake.blogspot.com,April 04,2025,https://hoquestake.blogspot.com/2025/04/reshaping-global-trading-system-what.html?m=1
[3]"Tariff Debate Continues ",https://hoquestake.blogspot.com,November 03,2025,https://hoquestake.blogspot.com/2025/11/tariff-debate-continues.html?m=1
[4]"US Treasury Intervenes To Support Yen After Japan Steps In,FT Reports",Fabiola Arámburo and David Lawder ,August 01,2026.
https://www.reuters.com/world/asia-pacific/us-treasury-undertakes-intervention-yen-market-ft-reports-2026-08-01/