Yen breaks the 160 threshold, government warns of intervention, is this really going to happen?

The yen briefly plunged to 160.72 on Thursday, touching its lowest point since Japan's large-scale market intervention in 2024, which immediately triggered high-density verbal warnings from authorities.

Foreign exchange policy chief Jun Mimura stated in Tokyo, "If you want to get out unscathed, I'll say it for the last time," while Finance Minister Katayama used more direct language, stating that the timing for "bold actions" is "drawing near." In the discourse of Japanese financial officials, "bold actions" typically refers to market interventions. Following these statements, the yen briefly recovered to around 159.46.

The Federal Reserve and the Bank of Japan both stood pat this week, with no change in the interest rate gap between the two countries, continuing to suppress the yen. Bank of Japan Governor Kazuo Ueda said that more time is needed to assess the impact of Middle Eastern geopolitical risks before deciding on the timing of the next rate hike.

Mitsubishi UFJ Morgan Stanley Securities foreign exchange strategist Shota Ryu noted that Ueda did not explicitly state whether an interest rate hike would occur in June, "If a rate hike is out of the question, intervention will be the only means to prevent the yen from falling."

The high oil prices brought about by conflicts in the Middle East have put additional pressure on the yen. Japan's heavy dependence on crude oil from the Gulf region means that rising energy import costs imply a further expansion of the trade deficit, fundamentally weakening the yen's support. Katayama also warned that authorities might take measures against speculative behaviors in the oil futures market.

Before Katayama's speech, J.P. Morgan's Chief Foreign Exchange Strategist in Japan, Tanase Junya, stated that yen devaluation driven by oil prices "could also be seen as speculative behavior, potentially providing a justifiable reason for intervention," and believed that the likelihood of authorities intervening before the US dollar to yen exchange rate reaches the peak of this cycle at 162 is "quite significant."

To what extent verbal warnings can replace actual actions is the biggest variable at the moment.

In 2024, Japan used about 100 billion USD to intervene in the foreign exchange market, with the first intervention also occurring after the Bank of Japan maintained its interest rates.

From an intervention logic perspective, Japan's Finance Minister has publicly stated readiness to enter the market at any time, even during the Golden Week holiday. Japan does have a precedent for interventions during holidays, and authorities' concerns about the weak yen driving up living costs have been repeatedly expressed.

Moody's Analytics economist Stefan Angrick pointed out that liquidity is lower during holidays, and the market impact of each intervention fund is usually greater than on normal trading days, making the market closure window from May 4th to 6th a time to be vigilant.

However, several analysts believe that the time to act is not yet ripe.

NLI Research Institute economist Ueno Tsuyoshi stated that the current yen trend does not meet the "excessive and disorderly" threshold for intervention—the speculative short positions are far below the levels when Japan last entered the market in 2024, and the pace of devaluation has remained relatively restrained due to expectations of intervention.

He judged that actual intervention might only be triggered if the yen breaks through the 162 level in a short period, and any intervention effects at this stage could be offset by changes in the Middle East's geopolitical situation.

The efficacy of interest rate tools is also limited. The market has already factored in the summer rate hike expectations, and the marginal impact of the Bank of Japan's further rate hike on curbing the depreciation trend is minimal. Ueno also noted that it is difficult for central bank officials to send clear signals on the monetary tightening path before the June meeting, as the policy direction largely depends on the evolution of the situation in the Middle East.

The 10-year Japanese government bond yield has risen to 2.52%, the highest level since 1997, reflecting the inflationary pressure of rising energy costs spreading to a broader range of goods and services.

The variables to watch in the follow-up include whether the yen will experience sharp fluctuations during the Golden Week holiday window, whether the 162 mark can be held, and whether the Bank of Japan can build the necessary international public opinion foundation for intervention actions without causing "currency manipulation" disputes before its June meeting.