Why Are the US and Japan Supporting Yen Currency Intervention? Here's What It Means

The United States and Japan have now said they are cooperating on yen currency intervention that aims to stabilize Japan’s currency as the foreign exchange market is unstable. Investors and the public have been wondering why Japan would buy its own currency and what could be the US role in the process.

Currency intervention occurs when the central bank or finance ministry of a country buys or sells its own currency in the foreign exchange market to affect its value. Japanese authorities intervene when the Japanese yen (JPY) weakens significantly against major currencies like the US dollar.

A weak yen has advantages and disadvantages. On the one hand, it makes Japanese exports cheaper and more competitive in international markets. Toyota, Sony, and Nintendo are better off from the standpoint that overseas buyers pay less for their products. But when the yen falls too far, imports go up as well.

Japan imports a lot of its crude oil, natural gas, food products, and raw materials. When the yen loses value, Japan has to pay more yen to purchase these essential imports. That increases fuel prices, electricity costs, food costs, and overall inflation, placing financial pressure on people and firms.

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To prevent a rapid depreciation, the Japanese Ministry of Finance, with the Bank of Japan (BOJ), may intervene by selling part of its foreign currency reserves, mainly US dollars, and buying Japanese yen. That drives up demand for the yen on world markets, and it helps strengthen its value against other currencies.

The United States is not necessarily buying yen as a matter of course. Washington might simply be helping or collaborating with Japan to maintain financial market stability. Joint statements from the two countries reassure investors that the intervention is not aimed at heightening volatility but at reducing excessive volatility rather than manipulating exchange rates for trade purposes.

Financial markets prefer exchange rates to be determined by supply and demand. But governments intervene when currency movements are so fast or chaotic that they disrupt international trade, increase inflation, and create uncertainty for businesses and the economy as a whole.

For example, if the exchange rate moves from 1 US dollar = ¥145 to ¥170 in a very short time, imported goods become much more expensive for Japanese consumers. By purchasing yen, authorities try to reduce this pressure and stabilize the currency.

Economists say Japan doesn’t necessarily want the yen to get very strong either. A strong yen can hurt exporters by making Japanese products more expensive overseas. Rather, policymakers want to have a stable exchange rate to help both exporters and domestic consumers.

The recent cooperation between the US and Japan can be seen as part of broader efforts to keep global financial markets calm during times of high volatility. Currency intervention can never permanently stabilize exchange rates, but it could slow movements, restore investor confidence, and perhaps even provide temporary stability.

As global economic conditions continue to change, exchange rates will continue to be affected by interest rates, inflation, economic growth, and monetary policy. Currency intervention is one of the tools a government can use when market movements threaten economic stability.