Les marchés obligataires mondiaux font face à une augmentation des rendements en raison des tensions géopolitiques.

Upward Pressure on Global Yields

The global bond market is currently navigating a period of significant volatility, characterized by a "meltdown" and a broad sell-off that has pushed yields higher [10]. This movement is increasingly driven by fears that inflation will remain elevated, potentially necessitating further interest rate hikes from the US central bank as early as the November session [2].

In the United States, Treasury yields are maintaining high levels, with the 10-year yield recently increasing by two basis points [2]. Investors are shifting their focus from the 5% threshold toward concerns that yields could move toward 6% [15]. This transition suggests a fragile environment for fixed income, particularly as global debt has surpassed $365 trillion, presenting a systemic risk to broader market stability [15].

Energy Shocks and Geopolitical Friction

Geopolitical instability in the Middle East is acting as a primary catalyst for inflation concerns. The Strait of Hormuz remains "practically closed" due to ongoing tensions, which has directly impacted energy markets [2]. Brent crude rose 4.1% to $107.36 per barrel, while WTI increased 3.4% to $95.40 [2].

Federal Reserve policymakers have expressed specific concerns that these fuel price shocks resulting from the Iran war could trigger broader inflationary pressures [2]. This combination of rising energy costs and geopolitical uncertainty is creating a precarious environment for fixed income, as it fuels expectations of persistent inflation [2].

Central Bank Policy and Labor Stability

The trajectory of interest rates is being shaped by a combination of hawkish central bank rhetoric and resilient economic data. Federal Reserve officials have signaled that following a recent landmark interest rate hike, they are likely to implement at least one more increase to the fed funds rate [2].

This stance is supported by recent US labor market data, which shows stability:

• US initial jobless claims fell to 197,000 last week, the lowest level since mid-July [24].
• The four-week moving average of claims decreased to 202,250 from 204,000 [24].

Such stability in the labor market typically supports a "higher-for-longer" interest rate environment [24]. Furthermore, the housing sector is feeling the impact of these trends, with the 30-year mortgage rate in the US creeping back toward 7%, a level that has been sustained for over four years and represents the highest levels since 2008 [24].

Sector Fragility and Economic Divergence

The rise in yields is exerting downward pressure on various asset classes and sectors. High-valuation technology names are facing fragility; for example, Arm Holdings dropped 6.67% to $310.39 during a broader retreat in chip stocks [4]. Similarly, the travel sector is facing headwinds, with market conditions pointing toward "softer travel demand into late 2026" [5].

While the macro environment is tightening, economic indicators show some divergence:

• Fitch has upgraded its 2026 global GDP growth forecast upward by 0.2 percentage points to 2.6%, suggesting economic resilience despite rising real interest rates [9].
• Conversely, in Brazil, high interest rates are already slowing economic activity, leading the central bank to cut its 2026 GDP growth forecast to 1.8% [2].
• In the US, business activity accelerated to a five-year high in September, a data point that contributed to the climb in Treasury yields [5].

What to watch

• The trajectory of US mortgage rates through the end of 2026, specifically whether they remain at or around the 7% level [24].
• Future commentary from Federal Reserve policymakers regarding the necessity of additional hikes to reach inflation targets [2].
• Movements in oil prices (Brent and WTI) and their impact on inflation expectations [2].
• The Federal Reserve's upcoming meeting in October for potential rate decisions [5].
• The extension of the tariff pause between the US and China until January 10 [4].