The US 30-year Treasury yield pushed above 5.33% on August 18, its highest level since June 2007, as investor unease over surging government spending, a wave of long-dated bond issuance and inflation that has stayed above the Federal Reserve’s target for five straight years finally spilled into equity markets. The move erased roughly $420 billion from US stocks at the opening bell, with the Nasdaq 100 sinking 504 points — a 1.7% drop — after failing to hold the 30,000 level, while the S&P 500 fell 0.69% to 7,691.
Oil added to the pressure, climbing above $91 a barrel even as the diesel crack spread — the premium diesel commands over crude — hit a historic $102.20, more than double its normal $20-to-$40 range and well past the peak of the 2022 energy crisis. CNBC confirmed the 19-year high in long-bond yields, tying the move directly to mounting concern over the sustainability of US fiscal spending.
Leverage unwinds at a record pace
The selloff coincided with the largest monthly margin debt decline on record: US investors cut their broker borrowing by $85 billion in July, bringing total margin debt down to $1.42 trillion — the first monthly decrease since March. For context, the only comparable drop was a $80 billion decline in January 2022, which marked the start of that year’s bear market, a parallel that’s likely to unsettle traders watching leverage unwind at a similar clip now.
Related: Bank of America Turns Defensive as Fund Managers Hit 3.5% Cash
Debt-servicing costs climbing alongside yields
The bond move is also feeding into Washington’s own finances. US interest payments on its debt have hit the highest level in history, with the government now spending 3.3% of the entire economy just servicing interest — and if rates hold near current levels, gross interest costs are projected to climb from $1.4 trillion today to $1.7 trillion by 2028. That dynamic creates a feedback loop: higher yields raise the government’s own borrowing costs, adding to the deficit pressures that are helping push yields higher in the first place.
Risk-off spreads to crypto
The broader risk-off move didn’t stay contained to equities and bonds. More than 63,000 crypto traders were liquidated in the 24 hours surrounding the selloff, a reminder of how tightly leveraged crypto positioning has become correlated with moves in traditional rates markets. Bitcoin, Ethereum, XRP and Dogecoin were already stuck in tight technical ranges heading into the yield spike, leaving little room to absorb a fresh wave of macro-driven selling without a sharp move in one direction.
