The US Treasury market is facing a confluence of mounting pressures.

On Wednesday, the Treasury Department completed a $42 billion auction of 10-year notes, with a high yield of 4.683%, marking the highest level since 2007, during the global financial crisis. This underscores a growing trend where investors demand higher returns to absorb government funding needs.

Meanwhile, the day's consumer price index (CPI) data came in broadly in line with expectations, cooling bets on a Federal Reserve rate hike in September. Swap market pricing indicated the probability of a hike had fallen to around 40% from roughly 50% earlier.

The auction outcome sets the stage for Thursday's 30-year bond sale, which is expected to produce the highest financing cost in a quarter-century. Persistently high inflation above the Fed's target and a widening fiscal deficit are the primary factors suppressing long-end bond prices and pushing up long-term yields.

Auction results showed the 10-year note's high yield was only slightly above the secondary market level at the 1:00 PM New York bidding deadline, suggesting demand was only marginally weaker than expected. Most Treasury prices ended the day roughly flat.

Deficit and Inflation Cap Yield Decline Potential

"Against the backdrop of a large fiscal deficit, solid economic growth, ongoing geopolitical conflicts, and inflation above the Fed's target, yields are still difficult to decline," said Gregory Faranello, head of US rates trading and strategy at AmeriVet Securities.

The dual pressures of inflation and fiscal concerns form the core support for current long-term interest rates. Data from the Bureau of Labor Statistics showed that the core CPI, excluding food and energy, rose 0.2% month-over-month in July, with an annual increase of 2.5%, matching the slowest pace since March 2021. Despite this, inflation still runs above the Fed's target, and combined with expanding government funding needs, the room for long-term yields to fall is significantly compressed.

Brad Conger, chief investment officer at Hirtle & Co., said the firm has added to its 20-year Treasury exposure when yields broke above 5%, "based on our view that multiple factors will suppress broad-based inflation—most notably the reality of stagnant real wages."

September Rate Hike Bets Cool, but Year-End Uncertainty Remains

Following Wednesday's CPI data, market bets on a Fed rate hike at the September meeting contracted noticeably. The 2-year Treasury yield, most sensitive to the federal funds rate, edged down less than 2 basis points to 4.20%. However, investors are still fully pricing in at least one more rate hike by year-end, reflecting ongoing concerns about price pressures in the US economy.

Steve Ryder, senior fixed income portfolio manager at Aviva Investors, noted: "This data should keep the discussion around a September rate hike alive, but it doesn't provide enough urgency for the Fed to act immediately. Policymakers may rely more heavily on the next CPI report and labor market data before deciding whether further tightening is needed this year."

Last weekend, July labor market data came in weaker than expected, triggering a bond market rally and a simultaneous downgrade in expectations for rate hikes this year. With the Fed's next rate decision not until September, market focus has now shifted to the August monthly inflation and employment data.

Jackson Hole Meeting Could Provide Policy Signals

Christopher Hodge, chief US economist for North America at Natixis, said that while the possibility of a policy surprise must be priced into every recent Fed meeting, "we still lean toward the view that the Fed can barely avoid another rate hike." He cited the gradual decline of inflation toward target, cooling consumer spending, and a fragile employment outlook as supporting arguments.

The Fed's annual central bank symposium in Jackson Hole, Wyoming, later this month will be closely watched by the market. Gregory Faranello noted that although Fed Chair Powell has deliberately avoided providing policy path guidance to the market since taking over early this year, the meeting will still be a key window for him to "fine-tune the messaging on inflation."