Brent Oil Breaks $100 Mark: Which Energy and Defense Stocks Benefit Now

Brent crude oil broke through the $100 per barrel threshold on September 9, 2026 – for the first time since July 2026. The price increase is directly linked to escalating tensions between the US and Iran, as well as new Iranian plans to control shipping through the Strait of Hormuz.

Volatile Price Development Since Start of Year

Oil prices showed extreme fluctuations in 2026, closely correlated with the US-Iran conflict. Between February 28 and March 27, 2026, Brent oil rose from $72.48 to $112.57 – a gain of 55.32 percent. On March 31, 2026, the price reached its year-to-date high of $118.35.

Following the signing of a memorandum of understanding between the US and Iran in June 2026, the situation eased temporarily. Brent oil fell from $118.35 on March 31 to $71.57 on July 1, 2026. On July 2, 2026, the price even traded at just $69 per barrel – the year's low point.

As early as September 7, 2026, Brent oil had reached a six-week high of $97.50 per barrel, placing it roughly 40 percent above lower levels. On September 9, 2026, the breakthrough above the psychologically important $100 mark followed.

Iran's New Shipping Zone Increases Risks

On September 8, 2026, Iran announced the establishment of a new shipping route with Oman in the Strait of Hormuz. The concept envisions ships having to coordinate with Tehran to enter a new maritime exclusion zone around the waterway. This measure could significantly complicate tanker traffic through this critical oil chokepoint.

Despite elevated risks, oil continues to flow from the Persian Gulf. According to reports from September 7, 2026, approximately 7 million barrels of crude oil and refined products pass through the Strait of Hormuz daily – one of the world's most important shipping routes for global energy trade.

Market Reactions to Geopolitical Developments

Recent price movements show a clear reaction to military developments. On September 3, 2026, oil closed 1 percent higher after US-Iran attacks threatened supply. Already on September 2, 2026, oil prices had reached fresh six-week highs due to renewed tensions in the Middle East.

At the end of August, on August 31, 2026, oil prices rose more than $4 per barrel after renewed fighting between the US and Iran brought supply disruption risks in the Middle East back to the fore. In contrast, oil prices had reached their lowest level in over a week on July 28, 2026, when the US had paused attacks against Iran.

Which Stocks Could Benefit

Higher oil prices typically affect different sectors differently. Energy companies – particularly oil producers and explorers – generally benefit from rising crude oil prices, as their production costs remain constant while revenues increase. This group includes integrated oil majors as well as pure upstream companies (exploration and production).

Oilfield services companies, which provide equipment and services for oil extraction, also often see increased demand at higher oil prices, as producers expand their investments in new projects.

Defense stocks – shares of defense and armament companies – can also be in demand during times of geopolitical tensions. Escalations in strategically important regions such as the Middle East frequently lead to increased demand for defense systems, military equipment, and security technology.

Risks for Other Sectors

While energy and defense stocks can benefit, higher oil prices burden many other industries. Airlines and logistics companies face rising fuel costs that pressure their margins. Chemical companies that rely on petrochemical feedstocks, as well as consumer goods manufacturers with energy-intensive production, can also be negatively affected.

For investors in the DACH region, a persistently high oil price also potentially means rising inflation rates, which could influence the monetary policy of the European Central Bank. Higher energy costs directly affect consumer prices and could weaken consumer purchasing power.

Outlook Remains Uncertain

The further development of oil prices depends largely on the course of the US-Iran conflict. The historical price development in 2026 shows that diplomatic progress can quickly lead to price declines, while military escalations drive prices upward.

Iran's announced new shipping zone in the Strait of Hormuz represents an additional uncertainty factor. Should this zone actually be implemented and obstruct tanker traffic, further price jumps could follow. At the same time, renewed diplomatic rapprochement – as was observed in June 2026 – could quickly drive prices down again.