Brookings Economist Robin Brooks Warns of a Slow-Motion Fiscal Crisis in Global Bond Markets

3. Unstable global geopolitics

Elevated geopolitical risk means higher defense spending than anticipated a decade ago. Shocks like Russia's war in Ukraine strain public finances everywhere, but are disproportionately burdening previously low-debt countries. Germany, for example, is effectively "picking up the tab" for Italy and Spain, and German debt no longer trades like a safe haven. Fewer safe havens push yields still higher .

Market Effects Brooks Cites as Evidence

These three forces are combining to produce a cascade of market effects that Brooks treats as evidence that the crisis is already underway :

• Record-high forward yields — The U.S. 10y10y forward yield rose to its highest level in 20 years. Similar upward pressure on long-term forward yields is visible across G10 economies. The 30-year Treasury yield sits above 5.2%, the highest since 2007, while the Fed holds policy rates at 3.5% to 3.75% .

• Rising U.S. Treasury yields above 4.6% — Long-term Treasury yields have climbed sharply even as the Fed has resumed easing short-term rates, a decoupling Brooks flags as "thoroughly alarming" .

• The "debasement trade" lifting gold — Gold has risen nearly 10% since the Fed's July 29, 2026 meeting. Brooks argues this is driven by markets seeing "the writing on the wall" on fiscal policy and growing worries that the Fed is subject to "fiscal capture" .

• Pressure on central banks to cap yields — Brooks expects pressure on central banks to intervene in bond markets to only grow, which in turn increases fears about the fiscal capture of monetary policy, pushing safe havens like gold, the Swiss franc, and the Swedish krona even higher .

What This Means for Investors

Brooks's analysis suggests that the traditional relationship between short-term rate cuts and lower long-term yields has broken down. Even as the Federal Reserve has resumed its easing cycle, long-term rates have continued to climb — a dynamic he has been flagging for months across a series of posts . The key concern is that if markets lose confidence in governments' ability to stabilize debt, borrowing costs could spiral, potentially triggering a sovereign debt crisis across developed economies.

For investors, the key takeaway is to watch forward yield measures — like the 10y10y — rather than just the spot 10-year yield, because front-end rate cuts can temporarily mask structural deterioration in the long end of the curve .