Trumpflation Drives U.S. Inflation and Threatens Stock Market

A combination of policy decisions, military actions, and technological trends, collectively termed "Trumpflation," is pushing U.S. inflation to levels that threaten the current stock market bull rally. Trailing 12-month inflation reached a peak of 4.2% in May 2026.

Donald Trump drove this trend through the reinstatement of sweeping global tariffs and a military attack on Iran on February 28. The attack led to the closure of the Strait of Hormuz, causing the largest energy supply disruption in modern history. While the Supreme Court of the United States overturned many of the "Liberation Day" tariffs in February 2026, the inflationary impact persisted.

The Federal Open Market Committee also identified AI-related pricing pressures as a contributor to core goods inflation. These cumulative factors have resulted in rising Treasury bond yields and sparked internal conflict within the Federal Reserve System. Three voting members favored a rate hike during the July 28-29 meeting to stabilize prices, leading the bond market to question the stance of Federal Reserve Chair Kevin Warsh.