US Inflation Hits 3.8%: Fastest Rate Since May 2023 Amid Iran War Impact

• US inflation rose to 3.8% in April, the fastest rate since May 2023.
• The increase was driven by surging energy costs, including gasoline and groceries.
• The US-Israel war in Iran has led to a jump in oil prices, causing a surge in gas prices in the US.
• The national average price for a gallon of unleaded gas is at its highest level since July 2022.

The US consumer price index (CPI), which measures the rate at which prices rose over the past 12 months, increased to 3.8% in April, marking the highest level since inflation hit 4% three years ago. According to the Bureau of Labour Statistics (BLS), almost half of the rise was driven by surging energy costs, while housing and food costs also contributed to the increase.

The impact of the US-Israel war in Iran has been felt by consumers in the US, with a jump in oil prices causing a surge in gas prices. The national average price for a gallon of unleaded gas is now at its highest level since July 2022, at $4.50 (£3.33), according to data from the AAA motoring group.

Market Impact

The rise in April's inflation figure makes it increasingly unlikely the Federal Reserve will cut interest rates this year. Isaac Stell, investment manager at the Wealth Club, said the inflation increase even left possible interest rate hikes "firmly on the table". Stell added that the incoming chair of the US central bank, Kevin Warsh, would enter the role with "little room for manoeuvre" and may be forced to take a more conservative approach.

The increase also poses a challenge for US President Donald Trump and the Republicans ahead of November's midterm elections, after Trump's 2024 re-election campaign focused largely on his plans to cut inflation. Trump described the increase as "short-term" and said Americans would understand his priority, keeping Iran from developing a nuclear weapon.

Impact on Americans

Air fares and clothing also increased in the year to April, while the price of new cars fell slightly. The closure of the Strait of Hormuz has caused the price of jet fuel to spike, with US airlines quickly passing on increases to customers. The average airfare rose by 20.7% in April, according to Tuesday's figures.

April's inflation figure also marked the first time in three years that Americans' pay packets have not been growing faster than prices are rising. While prices rose by 3.8% for the year to April, average paychecks grew by just 3.6%. US stock markets opened lower on the news, with the S&P 500 falling 0.6% and the Dow Jones Industrial Average down 0.7%.

Background: US Inflation and Interest Rates

The US inflation rate has been a topic of concern for policymakers and investors in recent years. In June 2022, the inflation rate peaked at 9.1%, the highest level in 41 years. The Federal Reserve has been tasked with keeping inflation at a rate of 2% or less, and has used interest rates to control inflation.

However, the impact of the US-Israel war in Iran has added a new layer of complexity to the inflation picture. The closure of the Strait of Hormuz has caused a surge in oil prices, leading to higher gas prices in the US. This has left policymakers with a difficult decision: whether to cut interest rates to stimulate the economy or to keep rates high to control inflation.