FX.co ★ Mexico’s Mid-September CPI Accelerates to 0.33%, Tripling Previous Fortnight’s Pace

Mexico’s consumer price inflation gathered pace in the first half of September 2026, with the 1st half-month CPI rising 0.33%, up sharply from the 0.10% increase recorded in the first half of August 2026. The latest data, updated on 24 September 2026, point to a renewed buildup of price pressures after a relatively subdued previous reading.

The acceleration from 0.10% to 0.33% over a single fortnight suggests that inflationary momentum has strengthened at the start of September. While the figures are only for the first half of the month, the pickup will be closely watched by market participants and policymakers as an early signal of whether price dynamics in Mexico are beginning to turn less favorable after a period of moderation.

Investors and analysts will now focus on how this mid-month data feed into expectations for September’s full-month inflation figures and any potential implications for monetary policy. A sustained rise in short-term CPI prints could complicate the outlook for interest rates and financial conditions in Latin America’s second-largest economy.