Ratings, oil and yields

Two data points collided this week that used to be considered mutually exclusive:

1- The US 10-year yield closed at exactly 5.00% on September 15 — a level that had never once been reached simultaneously with $100 Brent crude in over 9,700 trading sessions dating back to 1987. It has now.

2- Meanwhile France's 10-year sits at 4.54%, closing the gap with the US in a way that would have seemed absurd a decade ago, when French debt traded inside 1% and was treated as near-Bund quality.

Political instability in France has been the real driver. Fitch stripped France of its AA- status in September 2025, cutting it to A+ — the lowest rating France has ever recorded from a major agency — as the government collapsed in a confidence vote and investors grew concerned about the country's ability to rein in its deficit. S&P and Moody's followed with their own reviews shortly after, with S&P subsequently cutting France to A+ as well. Scope Ratings has France at AA- with a negative outlook. Four agencies, four downgrades or negative signals in roughly two years — all pointing at the same structural problem: chronic deficits (~5.8% of GDP), rising debt (~113%+ of GDP), and a parliament too fragmented to pass real fiscal consolidation.

This matters for the US: It's tempting to watch this as a "European problem." It isn't. In May 2025, Moody's downgraded the US from its pristine AAA rating to Aa1, becoming the third major agency to strip the US of top-tier status — joining S&P (since 2011) and Fitch (since 2023). Moody's cited a federal debt trajectory that could reach 134% of GDP by 2035, up from 98% in 2024.

For the first time in modern history, no G7 sovereign carries a perfect rating from all three major agencies — and a small club of US corporates are now rated higher than the US Treasury itself by Moody's.

5% yields plus $100 oil is a combination the market has never priced simultaneously. Add a genuine credit-quality erosion across the world's most important sovereign borrowers, and you get a structurally different environment for discount rates, term premia, and portfolio construction than most allocators built their models around.

The era of "risk-free" being a synonym for "US Treasury" or "developed-market sovereign" is being re-priced in real time.

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