US inflation peak in May 2026 as energy prices drop: Kalshi traders

U.S. inflation is believed to have reached its peak in May 2026, according to Kalshi market participants, who cite a significant drop in energy prices during June. Energy costs, which had driven inflation to a 4.2% year-over-year high in May, fell sharply after a mid-June ceasefire, leading to lower gasoline prices. This decline is influencing market expectations for the upcoming Consumer Price Index (CPI) report, scheduled for release on July 14, 2026. As a result, market participants on platforms like Polymarket are pricing June’s annual inflation with a notable probability that it will be 3.6% or less.

The dramatic reduction in energy prices, particularly gasoline, appears to be a major factor in this downward inflation expectation. A decrease from average gasoline prices of $4.60 per gallon in May to $3.918 by late June is contributing to the anticipated reduction in headline CPI. Currently, Polymarket shows a 47% probability for annual inflation to be 3.8% in June, suggesting that participants view the decline in energy prices as a key indicator for lower inflation figures.

Speculation around the CPI figures has also influenced other related markets. For instance, the probability of June’s inflation being 3.7% stands at 33% on Polymarket, as participants anticipate further details from the Bureau of Labor Statistics and other economic indicators leading up to the report’s release.

Key Takeaways

• Kalshi market activity suggests that inflation may have peaked in May 2026, consistent with reduced energy prices in June.
• Market participants are pricing a significant probability for June’s annual inflation to be 3.6% or less, indicating expectations of a decrease.
• Energy price declines, particularly in gasoline, appear to be a key indicator influencing these inflation expectations.

What to Watch

The forthcoming CPI report on July 14, 2026, will be crucial in confirming whether June’s inflation aligns with current market expectations. Observers should monitor further announcements from the Bureau of Labor Statistics and any updates on energy prices that could impact the inflation outlook. Additionally, any shifts in major forecasters’ predictions or economic data releases could affect market sentiment leading up to the report.

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Disclosure: This article was edited by Estefano Gomez. For more information on how we create and review content, see our Editorial Policy.