CAC 40 Slump, Wall Street Records and Oil Strains

Equity

The CAC 40 was the clear laggard among major global stock exchanges this week, ending down more than one percentage point over the period, bringing its year-to-date performance to -4.25%.

The catalyst did not emerge from equity markets themselves, but from the sovereign bond market. The French OAT-Bund spread, the barometer of French sovereign risk, widened past 150 basis points early in the week, an unprecedented level since the 2011 euro area sovereign debt crisis. The French 10-year OAT yield approached 5%, a symbolic threshold not seen in over twenty years. The message from bond investors was unequivocal: Prime Minister Lecornu’s 2027 draft budget was deemed non-credible. The public deficit failed to meet targeted projections, and market participants began pricing in a structurally higher sovereign risk regime for France. Adding to the discomfort, the ECB could not readily intervene: its Transmission Protection Instrument (TPI) is strictly designed for “unwarranted” spread widening (a widening triggered by a member state’s own domestic fiscal choices does not qualify).

In the United States, equity market dynamics were radically different. Both the S&P 500 and the Nasdaq posted record closing highs. This transatlantic decoupling highlights a structural reality established throughout the year: European political and geopolitical frictions no longer mechanically spill over to Wall Street. While the FOMC minutes indicated a majority of policymakers favored an additional rate hike before year-end, September’s disappointing employment data significantly moderated this outlook: payroll additions fell sharply short of consensus, leaving markets pricing only about a one-in-five chance of an October hike.

Commodities

Crude Oil

Crude oil recorded its most volatile week since July. The driver was straightforward: renewed military tensions between Washington and Tehran plunged markets back into uncertainty that months of cease-fire had temporarily dampened.

Reports circulated midweek that the U.S. military was preparing for potential strikes against Iran ahead of the November midterm elections. Brent immediately reclaimed the $100 mark. An oil tanker was hit off the coast of Qatar. Maritime traffic through the Strait of Hormuz dropped by more than a quarter compared to the prior week’s peak.

What proved striking was the speed with which markets priced in a significant geopolitical risk premium. This confirmed a well-documented physical dynamic: crude markets have a short memory and react symmetrically, to the upside and downside, on individual geopolitical headlines.

On Friday, Donald Trump stated that he did not intend to strike Iran before the midterms, citing “constructive” discussions. Brent eased modestly but remained solidly above $100 at the weekly close. The Strait of Hormuz remains the focal chokepoint: until it fully reopens without navigational threat, any incident can trigger fresh price spikes.

Gold

Gold emerged as the primary beneficiary of this turbulent week. The precious metal found itself in a rare configuration where multiple drivers acted simultaneously in the same direction.

Geopolitical risk premiums tied to U.S.-Iran tensions provided natural safe-haven support. But what made the week particularly constructive for gold was the addition of European sovereign risk. The French budget crisis reminded markets that political and fiscal instability in the euro area can materialize abruptly, precisely the type of uncertainty that drives institutional flows into physical gold.

Finally, softer U.S. labor market data reduced expectations of an immediate Fed rate hike, providing mechanical rate relief to non-yielding bullion.