Bonds, ballots, and the elephant in the room

Bond yields are rising for more nuanced reasons than oil prices and government debt, with growth, monetary policy and capital demand playing the central roles.

• The summer’s three portfolio themes are politics, bond yields and AI, while the collapse of the US-Iran ceasefire has pushed oil prices higher without yet causing major disruption to global business.
• The 30-year UK gilt yield has reached levels last seen in 1998, while 10-year yields in Germany and the UK are at post-global-financial-crisis highs; US federal debt has exceeded $40 trillion and Germany may run a deficit of up to 4% of GDP.
• Rothschild argues that recent yield increases mainly reflect higher real yields rather than a major rise in expected inflation, and that debt levels alone do not consistently explain differences in borrowing costs across countries.
• US 10-year yields track trend nominal GDP growth more closely than the debt-to-GDP ratio, while resilient growth, inflation risk and proactive central banks can support higher real yields without necessarily producing recession.
• The authors’ rule of thumb places fair-value 10-year yields at 4–5% for the US and UK and 3–4% for the eurozone, although they believe current US and UK yields may be overshooting slightly and caution that no one can identify fair value with certainty.

Takeaway: Investors should not treat higher yields as an automatic sign of fiscal crisis or recession; the outlook depends more on nominal growth, monetary policy, corporate returns and the coming AI-related demand for capital, while the definition of “normal” yields remains uncertain.