The Bond Market Fights Back: Trump, Intervention, Japan’s Warning

Key Takeaways

• The 30-year Treasury yield hit its highest level since 2007, and the Treasury responded by doubling its bond buybacks.
• The initial dip in yields quickly reversed, with US debt now past $40 trillion and interest costs above $1 trillion a year.
• Japan’s yield curve control era shows how far intervention can go, and what happens to yields when it ends.

The Trump administration has stepped up intervention in the US Treasury market after long-term yields climbed to their highest levels in almost two decades.

The 30-year Treasury yield recently reached around 5.3%, while the 10-year moved back towards 4.7%. Treasury Secretary Scott Bessent responded by doubling planned purchases of longer-dated government bonds from $2 billion to at least $4 billion per operation, and promising more.

Yields initially fell after the announcement, but much of the move quickly reversed as investors resumed selling bonds. The response highlighted the difficulty governments face when trying to suppress borrowing costs while the underlying pressures remain unchanged.
US government debt has exceeded $40 trillion. The interest on that is above $1 trillion a year and the budget deficit is large. Governments are also competing for capital with major private-sector investment programs, particularly AI infrastructure, while higher energy prices complicate the inflation outlook.

Bessent has described the purchases as liquidity support rather than an explicit attempt to cap yields. The Treasury is also constrained because, unlike the Federal Reserve, it cannot create money to purchase unlimited quantities of bonds. Buying longer-dated debt therefore has to be financed elsewhere, potentially through greater issuance of shorter-dated securities.

President Trump added another dimension to the debate when asked whether further intervention could follow if yields continued rising. He replied that the US had “many types of intervention” and added that “the ultimate intervention is our military”.

Trump did not explain what he meant. Was he saying there are different types of intervention in general, or was he talking about the bond market? Either way, it came during a discussion about Treasury-market intervention and attracted attention because yields had already begun reversing the government’s initial move.

Some commentators have described attempts to fight the bond market as an “unwinnable war”. Japan provides the clearest modern example of how far intervention can go.

For years, the Bank of Japan used yield curve control to hold government borrowing costs down, eventually saying it would purchase unlimited quantities of Japanese government bonds when yields approached its ceiling. The policy succeeded in keeping yields extremely low, but the BOJ accumulated a huge share of the bond market and weakened normal price discovery.

Japan gradually loosened the policy before abandoning yield curve control in 2024. Since then, Japanese bond yields have risen sharply, with the 10-year recently approaching 3% and longer-dated yields moving even higher.

The comparison matters because US intervention remains small by Japanese standards. If Treasury purchases fail to contain yields and Washington becomes increasingly unwilling to tolerate higher borrowing costs, pressure could eventually shift towards the Federal Reserve.

Large-scale Fed purchases could push yields lower, but they would also raise questions about whether monetary policy was still focused primarily on inflation or increasingly being used to manage government financing costs.

Japan showed that governments can suppress bond yields for long periods, but it requires increasingly large interventions and can create problems elsewhere. The US is still far from that point, although the direction of policy is becoming increasingly important for both bond and gold markets.