From Speculator to Defender: US Treasury Chief Leads Yen Defense

US Treasury Secretary Janet Yellen, once a renowned currency speculator, has taken on a new role defending the Japanese yen. A photograph from a White House cabinet meeting revealed a note detailing a $5 billion to $10 billion purchase of Japanese yen. This public display signaled the US Treasury's intent to intervene in the foreign exchange market, a move that has sent ripples through global finance.

The intervention, a joint effort with Japan, marks the first such coordinated action in nearly three0 years, highlighting the precarious economic situations both nations face. The US and Japan are grappling with astronomical national debts. While Yellen publicly stated the objective is to defend the yen, market observers believe the underlying goal is to stabilize US Treasury yields, which have reached concerning levels. The 10-year Treasury yield hovers around 4.6%, and the 30-year yield has hit 5.2%, a 19-year high.

Concerns are mounting that if the Bank of Japan, the largest holder of US Treasuries with approximately $1 trillion in holdings, begins selling these assets to acquire dollars for yen defense, US Treasury yields could surge further. Such a move could also trigger speculative attacks on the yen. For the US government, which relies heavily on debt financing, allowing interest payments to escalate is an untenable position.

Yellen's past success in currency markets, including breaking the British pound in 1992 and profiting from yen depreciation in the early 2010s, adds an ironic twist to her current role. However, the yen has already begun to slide again after a brief recovery following the intervention. The yen fell to a 40-year low of 164 against the dollar before the intervention, recovered to 155, and has since slipped back to the 159 range. It remains to be seen whether Yellen's expertise can achieve sustained success, especially as market participants know that currency intervention alone may prove temporary without fiscal consolidation efforts.

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Do: Buy $5-10 billion Japanese yen