US CPI surged to 4.2% in May! Soaring energy prices are the main culprit for inflation; a December interest rate hike is expected to reach 42.5%.

The US inflation monster is too strong! The US Bureau of Labor Statistics (BLS) officially released the Consumer Price Index (CPI) report for May 2026 at 8:30 PM Taiwan time tonight (10th), which has attracted worldwide market attention. The data shows that US inflationary pressure has risen significantly, fueled by energy prices. Not only has the overall CPI exceeded the 4% mark, but it has also cast a shadow over the future monetary policy path of the Federal Reserve (Fed).

CPI rose 4.2% year-on-year, with energy contributing over 60% of the increase.

According to detailed data from the BLS official report, the annual growth rate of the Consumer Price Index (CPI-U) for all cities in May reached 4.2%, a significant rebound from 3.8% in April; the seasonally adjusted monthly growth rate was 0.5% (previous value was 0.6%).

The report points out that the energy index is the biggest culprit behind this surge in inflation. The energy category saw a monthly increase of 3.9%, and an even more astonishing annual increase of 23.5%, contributing over 60% of the overall monthly CPI increase. Looking closely at the energy sub-items, gasoline prices saw a sharp rise, increasing by 7.0% monthly and soaring to over 40.5% annually. In contrast, the food index performed relatively moderately, increasing by 0.2% monthly and 3.1% annually, with home-cooked food prices rising only slightly by 0.1%.

Core CPI rose slightly to 2.9%, with housing costs remaining high.

After excluding volatile food and energy prices, the core CPI rose slightly to 2.9% year-on-year in May (up from 2.8% previously), while the monthly increase cooled to 0.2% from 0.4% in April.

It is worth noting that the cost of "shelter," which carries a significant weight in the core CPI, remains robust. Data shows that the shelter index rose 0.3% month-on-month in May, with an annual increase of 3.4%, including increases in rent and landlord-equivalent rent of 0.4% and 0.3%, respectively. Furthermore, services such as communications (up 1.3% month-on-month), airfares (up 2.7% month-on-month), and personal care (up 1.0% month-on-month) also showed a continued upward trend.

Interest rate cut expectations hit hard, risk assets face test.

This unexpectedly high inflation report is undoubtedly a heavy blow to global financial markets, which are at a critical crossroads. With overall inflation rising above 4% again (the first time since 2023), the market expects the Federal Reserve to be forced to maintain its restrictive high-interest-rate policy of "Higher for longer," making the chances of a rate cut in the short term even more remote.

Moreover, according to the CME Group's Fed Watch Tool, the probability of the Federal Reserve raising interest rates by 50 basis points in December has reached 42.5%, demonstrating the market's pessimistic attitude towards the US inflation problem.

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