Treasuries: 30-Year Nears 5% in Stagflation Bind

Every maturity on the curve has moved higher over the past two weeks, but the pace tells the story. The 30-year jumped 26 basis points from 4.64% on February 27 to 4.90% on March 13. The 10-year rose 31 basis points from 3.97% to 4.28%. The 2-year climbed 35 basis points from 3.38% to 3.73%.

The 10-year-to-2-year spread has held remarkably steady at 0.55%, meaning short and intermediate rates are rising in lockstep. But the 30-year is where the real action sits. The 117 basis point gap between the 2-year and 30-year reflects term premium expansion — investors demanding more compensation for holding duration risk in an uncertain inflation environment.

The last time the 30-year traded this close to 5% was late January. That episode was brief — buyers stepped in and yields retreated. This time feels different. The macro backdrop has deteriorated on both sides of the Fed's mandate simultaneously.

The FOMC meets March 17-18 and will almost certainly hold rates at 3.50-3.75%. That decision is straightforward. The hard part is the dot plot and the press conference.

The Fed cut aggressively through 2025, bringing rates down from 4.33% to the current range. Those cuts were predicated on inflation continuing to fall toward 2%. Core PCE at 3.1% blows that assumption apart. The oil shock — crude above $115 per barrel on the back of the Iran-Strait of Hormuz crisis — is not transitory in any meaningful sense. It feeds into transportation, manufacturing, and food costs with a lag that extends well into the second half of 2026.

Simultaneously, Q4 GDP came in at just 0.7% annualised. That is stall speed. The economy is slowing under the weight of tariff uncertainty, elevated borrowing costs, and consumer fatigue. The Fed cannot cut into a 3.1% core PCE print without losing credibility. It cannot hike with 0.7% growth without risking recession.

This is the definition of a policy trap. The bond market has already voted: long-end yields are rising because investors see no clean exit.

The average interest rate on total US interest-bearing debt hit 3.32% as of February 28, up from 3.15% a year earlier. Treasury Bills carry an average rate of 3.72%, while Notes average 3.19% and Bonds average 3.38%. As older, lower-coupon debt rolls over into today's higher rates, the government's interest expense continues to climb.

The federal deficit shows no signs of contracting. Spending commitments are locked in, and revenue growth has stalled alongside the economy. Every 10 basis point increase in the weighted average cost of debt adds billions in annual interest expense. The 30-year approaching 5% means new long-bond issuance will be materially more expensive than the outstanding stock.

Foreign demand — traditionally a stabiliser for long-duration Treasuries — faces its own headwinds. Tariff escalation and geopolitical friction reduce the incentive for surplus countries to recycle dollars into US government bonds. If foreign buyers step back even modestly at a time of elevated issuance, domestic buyers must absorb more supply. That requires higher yields.

A 5% 30-year Treasury yield is not just a round number. It is a valuation anchor that reprices every long-duration asset in the financial system.

Mortgage rates, already elevated, would push further above 7%. Corporate bond spreads would widen as the risk-free benchmark rises, making capital more expensive for investment-grade and high-yield borrowers alike. Equity valuations — particularly in growth sectors trading at 30x forward earnings — face a gravitational pull when the risk-free alternative offers 5%.

For individual investors, the calculus shifts. A 30-year at 5% offers a real yield above 2% against current inflation — genuine compensation for duration risk. The question is whether you believe inflation will remain at 3% or re-accelerate further. If the former, locking in 5% is a generational opportunity. If the latter, even 5% will not be enough.