In May 2026, the consumer price index (CPI) increased to 4.2% year-over-year, marking the highest inflation rate since April 2023 and up from 3.8% in April, according to the U.S. Bureau of Labor Statistics.
Mark Zandi, chief economist at Moody's, described the inflation as 'painfully high' and suggested it may peak soon due to declining oil prices, but warned that it would not return to the Federal Reserve's 2% target for some time. Joe Seydl, a senior markets economist at J.P.
Morgan Private Bank, identified three main factors contributing to this inflation: an 'oil shock' from the Iran war, tariffs from the Trump administration, and increased consumer costs driven by a boom in artificial intelligence-related capital spending.
The Iran war has significantly disrupted oil supplies, particularly through the Strait of Hormuz, leading to a 41% increase in motor fuel prices compared to the previous year. As of June 1, gasoline prices averaged $4.31 per gallon, up 38% from $3.13 a year earlier. Airline fares also rose by 27% in May, largely due to elevated jet fuel prices.
The Federal Reserve's upcoming policy meeting will be crucial, as higher inflation and a strong jobs report may influence their decision on interest rates. While housing and vehicle inflation remain subdued due to weak consumer demand, the overall inflationary pressures from energy costs and tariffs could prompt the Fed to consider rate hikes rather than cuts.
Economists predict that if the Iran war continues, oil prices could rise significantly, potentially reaching $140 per barrel by late 2026. Additionally, the impact of tariffs on inflation may diminish, but supply chain pressures from the Iran conflict could sustain elevated core goods inflation.
Zandi noted that AI's increasing demand for electricity and consumer electronics is also contributing to inflationary pressures, indicating that multiple factors are at play in the current economic landscape