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Brent crude tops $100 as US yields hit 18-month peak

By Markets Desk · 2026-09-09 · 2 min read
A silhouette of an offshore oil rig standing in a calm sea under a hazy sky
Illustration: Tradingbird

Brent crude oil breached $100 per barrel on Wednesday, marking a significant rise in energy costs. Simultaneously, the yield on 10-year US Treasury notes climbed to 4.837%. These moves occurred while major US stock indices posted losses.

Brent crude oil prices surpassed the $100 per barrel threshold on Wednesday. The benchmark closed at $100.27, representing a 2.4% daily increase. This was the first time the price exceeded this level since July 24. The surge followed reports that Iran fired ballistic missiles at a US base in Jordan. Both nations also claimed attacks on vessels, raising fears of supply disruptions.

The yield on 10-year US Treasury notes rose to 4.837%. This level is the highest recorded since November 2023. The increase followed the US Treasury Department’s announcement to buy up to $6 billion in government bonds. The buyback amount exceeded the $4 billion previously signaled. However, some analysts had anticipated a larger purchase to support longer-duration debt.

Equities decline amid geopolitical risk

Global stock markets fell during midday trading. The Dow Jones Industrial Average dropped by 0.52%. The S&P 500 index declined by 0.39%. The Nasdaq Composite fell by 0.61%. The MSCI global index, which tracks stocks worldwide, was down 0.42%. Investors reacted to Middle East turmoil and upcoming central bank decisions.

Market analysts noted that breaking the $100 oil price mark is a psychological milestone. A prolonged oil shock could keep inflation pressures elevated. This complicates the policy path for central banks. These institutions are already navigating a difficult environment with rising price pressures.

Currency markets react to inflation fears

The euro strengthened ahead of the European Central Bank's policy decision. The currency reached a one-week high of $1.16493. Markets widely expect a rate hike due to inflationary pressures from the Iran conflict. The Japanese yen also firmed up towards a seven-month high.

Treasury bond buyback exceeds expectations

The US Treasury Department announced a purchase of up to $6 billion in 10-to-20-year bonds. This figure is higher than the $4 billion previously indicated. The move aims to support the bond market. However, some market participants had forecasted an even larger intervention. The yield increase suggests that the buyback was not sufficient to lower borrowing costs significantly.

GN auto markets/bonds: bond yields reported the sharp rise in US debt costs. The data confirms the tightening financial conditions across asset classes. Energy costs and government debt yields are moving in the same direction. This divergence from equity performance highlights the current market stress.

Based on reporting by GN auto markets/bonds: bond yields, compiled by the Tradingbird desk.

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