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Oil prices rise 2% to one-month high as US-Iran attacks deepen supply disruption - Finance news and analysis from Global Banking & Finance Review
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Oil prices rise 2% to one-month high as US-Iran attacks deepen supply disruption

Published by Global Banking & Finance Review

Posted on July 14, 2026

4 min read

· Last updated: July 14, 2026

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Oil prices rise 2% to one-month high as US-Iran attacks deepen supply disruption

Oil Market Reactions and Global Impacts

By Scott DiSavino

July 14 (Reuters) - Oil prices climbed about 2% to a one-month high on Tuesday after the U.S. reimposed a naval blockade on Iran, which will reduce oil flows from the region through the Strait of Hormuz.

Impact of the Strait of Hormuz Blockade

Before the Iran war about 20% of global oil supplies flowed through the strait.

Concerns Over Inflation and Economic Growth

Limiting price gains were concerns that higher energy prices could boost inflation, cut global economic growth and ultimately reduce demand for oil.

Oil Price Movements

Brent futures rose $1.43, or 1.7%, to settle at $84.73 per barrel, while U.S. West Texas Intermediate (WTI) crude rose $1.20, or 1.5%, to settle at $79.34.

For the second straight session, Brent closed at its highest since June 12 and WTI at its highest since June 15.

That price increase kept Brent in technically overbought territory for a second day in a row for the first time since March.

US-Iran Conflict Escalation

"The resumption of attacks between the U.S. and Iran is accelerating this week and will likely continue given the additional U.S. bombing overnight that followed reinstatement of a U.S. blockade of the Strait of Hormuz," analysts at energy advisory firm Ritterbusch and Associates said in a note.

US Policy Developments

U.S. President Donald Trump stepped back from a proposal to charge a 20% fee to guard the Strait of Hormuz as part of the conflict with Iran, saying he would instead seek investment deals with Gulf states.

U.S. forces had carried out waves of attacks for the third night after Tehran said it had closed the strait. Trump on Monday reinstated a blockade of Iranian shipping and proposed the fee. 

Market Reactions to Attacks

Hours before the fee was to take effect, Trump said the strait was open to all shipping traffic except that of Iran. After that comment, U.S. crude futures briefly turned negative on Tuesday morning. Prices recovered later in the day on reports that one Indian crew member was killed and eight others were wounded when Iranian cruise missiles struck two Emirati oil tankers.

The attacks have fed doubts that a memorandum of understanding signed last month will lead to a permanent halt in the war that has disrupted global energy supplies and stoked inflation fears.

In early July, when it looked like the ceasefire between the U.S. and Iran would hold, futures for Brent and WTI were trading near levels seen before the U.S. and Israel started bombing Iran on February 28.

Inflation and Diesel Worries

US Inflation Data

Data showed that U.S. consumer inflation slowed more than expected in June as energy prices retreated, but financial markets still expect an interest rate hike from the Federal Reserve.

Federal Reserve Response

Fed Chairman Kevin Warsh on Tuesday vowed to "do my job" if challenged by Trump, who has said he wants the Fed to cut interest rates and boost economic growth.

Global Diesel Supply Concerns

Ukraine's military said it struck two Russian oil refineries in the Bashkortostan and Krasnodar regions overnight. Ukrainian attacks on Russia's energy infrastructure have caused Moscow to curtail diesel exports, boosting diesel prices around the world.

In the U.S., diesel futures are up about 21% so far in July versus a roughly 14% gain for U.S. crude. This has boosted the 3-2-1 and diesel crack spreads, which measure refining profit margins, to record highs, according to LSEG data.

US Oil Inventories

Weekly Storage Reports

The oil market awaited weekly storage reports from the American Petroleum Institute (API) trade group on Tuesday and the U.S. Energy Information Administration (EIA) on Wednesday.

Analyst Estimates

Analysts estimated energy firms pulled 2.7 million barrels of crude from storage during the week ended July 10.

If correct, that would be the 13th time in 14 weeks energy firms pulled crude out of storage. It compares with a decrease of 3.9 million barrels in the same week last year and an average decline of 1.5 million barrels over the past five years (2021 to 2025). [EIA/S] [API/S]

(Reporting by Scott DiSavino in New York, Anushree Mukherjee and Ishaan Arora in Bengaluru and Emily Chow in Singapore; Editing by Andrea Ricci and David Gregorio and Chizu Nomiyama)

Key Takeaways

  • Brent rose $1.68 (2%) to $84.98—its highest since mid‑June; WTI climbed $1.65 (2.1%) to $79.79. Markets digest heightened Strait of Hormuz risks. cite: Reuters July 14 report by Ishaan Arora
  • U.S. re‑imposed its naval blockade of Iranian shipping and announced plans to charge for safe passage, while Iran responded with missile attacks—escalation fueling energy insecurity. cite: AP News (blocking and tolls) cite: Axios on oil jump ~9%
  • Supply concerns are exacerbated by tanker attacks—including UAE vessels hit by Iranian missiles—and shrinking traffic through the strait, all contributing to the price spike and uncertainty. cite: AP on tanker attacks; Le Monde on ship traffic collapse

Frequently Asked Questions

Why did oil prices rise to a one-month high?
Oil prices increased due to escalating US and Iran attacks in the Strait of Hormuz, leading to greater uncertainty about global energy flows.
What incidents occurred in the Strait of Hormuz?
Two UAE tankers were hit by Iranian missiles, causing casualties and increasing tensions in the region.
How did the US respond to the attacks?
The US reimposed its naval blockade of Iran and launched consecutive strikes against Iranian targets.
What impact could the conflict have on global energy supply?
The conflict creates uncertainty in oil supply, potentially impacting global energy markets and causing price volatility.
Which other regions were affected by related attacks?
Yemen's Houthi movement fired missiles at Saudi Arabia, further contributing to instability in the broader region.

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