This unconventional, heavyweight intervention measure from the U.S. Treasury has sent a clear signal to Wall Street: Washington is attempting to forcibly suppress the rising yields at the expense of the dollar's strong position.

Source: Jin Shi Data

Faced with an ever-expanding debt burden, ongoing inflation worries, and increased competition from a surge in corporate financing, U.S. long-term Treasury yields soared dramatically this week. The 30-year Treasury yield even reached its highest level since 2007 at one point.

To address the situation of uncontrolled borrowing costs, Treasury Secretary Janet Yellen led a rare, powerful intervention on Wednesday. The Treasury publicly announced that it would "at least double" its planned purchases of outstanding 10 to 30 year Treasury securities.

This radical move marks a significant departure from the long-held principle of "regular and predictable" debt management. Ironically, Yellen herself publicly affirmed and supported this traditional management approach in a speech last November.

The forex market reacted extremely quickly to this news.

Andrew Canobi, head of fixed income at Franklin Templeton in Melbourne, believes that solving the structural debt problems in the U.S. is too difficult, and policymakers can only choose between controlling yields or tolerating a depreciating dollar.

Canobi explicitly noted that Yellen "is essentially saying that to keep term yields under control, we are willing to sacrifice some strength of the dollar." He stressed that there must be some kind of safety valve to relieve the pressure.

Gerald Gan, Chief Investment Officer of Reed Capital, a family office based in Singapore, views the dollar as "the biggest victim." He believes Yellen is deliberately lowering long-term real interest rates and hinting at tolerance for a weaker dollar to maintain economic operations. He added, "I would further diversify my investments away from the dollar."

Political Intentions Surface, Treasury and Policy Credibility Questioned

Before this significant buyback, Washington had already shown anxiety about market volatility. At the end of last month, it was rare for the U.S. to intervene in the forex market alongside Japan to support the yen; at that time, Yellen even suggested that if necessary, the Federal Reserve's tools could be used to fund further intervention to prevent Japan from being forced to sell U.S. Treasuries.

Amir Anvarzadeh, a strategist at Asymmetric Advisors in Singapore, pointed out that launching a Treasury buyback at this sensitive juncture has intensified market speculation about decision-makers panicking. He bluntly stated, "I don't think they intend to significantly weaken the dollar; they are trying to stabilize yields—at the expense of the dollar."

Coupled with U.S. President Trump's occasional expressions of favor for a weak dollar, Washington's actions are increasingly convincing investors of its political intentions to intervene in the market. A team of Evercore ISI strategists led by Marco Casiraghi stated that the Trump administration has consistently praised a weak dollar as beneficial for competitiveness, and Yellen would clearly welcome the recent exchange rate trends.

Audrey Childe-Freeman, Chief Forex Strategist at Bloomberg Industry Research, also views this move as potentially bearish for the dollar. She wrote in a report, "Traders may see this as an attempt to suppress market pricing of the sustainability of U.S. finances and the Fed's anti-inflation credibility."

Shoki Omori, Chief Fixed Income Strategist at Deutsche Bank AG in Japan, noted that recent price movements are very revealing. Despite short-term bonds facing sell-offs and strong expectations of Fed interest rate hikes, the dollar has experienced a widespread decline.

He emphasized this is a clear structural feedback. This abnormal performance indicates that investors are moving beyond simple spread logic to deeply question the broader policy mix of the United States.

De-dollarization Under Currents, Non-U.S. Currencies and Safe Assets Revalued

Despite the damage to policy credibility, some institutions have not immediately turned bearish on the dollar. Masahiko Loo, Senior Fixed Income Strategist at State Street Investment Management, pointed out that AI-driven stock market inflows and rising oil prices still provide short-term fundamental support for the dollar.

However, he simultaneously warned that the latest intervention undoubtedly reinforces the long-term trend of de-dollarization and currency depreciation. As sovereign AI programs and data center constructions expand overseas, the unique capital flow advantage currently enjoyed by the U.S. may gradually diminish.

For funds seeking to hedge, non-U.S. currencies are showing greater appeal. Mark Cranfield, a Markets Live strategist, stated that as investors weigh between Treasury buybacks and the expanding fiscal deficit, the sell-off pressure has created room for Asian currencies to rise.

Omori expects the yen to become the biggest beneficiary within the next three to six months. Washington's recent actions have inadvertently eliminated two core factors suppressing the yen: Japan's selling of U.S. Treasuries and the rising U.S. long-end yields. He also favors gold, Swiss franc, and euro as alternatives to the dollar.

When discussing the limits of the Treasury's ability to intervene, Omori pointedly stated, "The Treasury can buy back its bonds; but it cannot buy back dollars."

Under the clear strategy of artificially lowering borrowing costs, any attempts to manipulate U.S. yields lower are substantively undermining the attractiveness of dollar-denominated debt relative to other assets.

Although the dollar had previously withstood shocks from the Fed's massive bond purchases and tariff threats, this round of strong intervention targeting long bonds is undoubtedly initiating a new challenge to its global dominance.