Mexican Peso Ends Session Stronger Against Weak Dollar

The exchange rate ended September 15 at 18.3604 pesos per dollar, compared with Friday’s close of 18.4828, according to official data.

Written by: Ignacio Teson • Monday, September 15, 2025 • 1 min read

• Last updated: Monday, September 15, 2025

Quick overview

The Mexican peso strengthened against a softer U.S. dollar, marking its seventh consecutive session of gains.
The exchange rate closed at 18.3604 pesos per dollar, appreciating by 0.48% from the previous close.
The U.S. Dollar Index slipped 0.19% amid expectations of a potential interest rate cut by the Federal Reserve.
Mexican markets will be closed for Independence Day, and discussions on a proposed tariff hike on Asian autos are expected later this week.

The Mexican peso strengthened on Monday, closing higher against a softer U.S. dollar and notching its seventh consecutive session of gains. The move came during a trading day shaped by fresh data on U.S. manufacturing activity.

The exchange rate ended September 15 at 18.3604 pesos per dollar, compared with Friday’s close of 18.4828, according to official data from the Bank of Mexico (Banxico). That represents an appreciation of 8.79 centavos, or 0.48%.

The U.S. Dollar Index (DXY), which tracks the greenback against a basket of six major currencies, slipped 0.19% to 96.960 points in Monday afternoon trading. The weakness is largely tied to growing expectations that the Federal Reserve will cut interest rates, with markets betting on a 25-basis-point reduction at Wednesday’s meeting after keeping rates at 4.25%–4.50% since late last year. President Donald Trump has urged the Fed to deliver a larger cut.

USD/MXN

Local and Global Backdrop

Mexican markets will be closed Tuesday for Independence Day celebrations. Later this week, Mexican and Chinese officials are expected to meet to discuss Mexico’s proposed tariff hike on Asian autos.

Meanwhile, the Empire State Manufacturing Index, a measure of factory activity in New York compiled by the U.S. central bank, fell to 8.7 in September from 11.9 in August. Beyond the Fed, investors will also be watching monetary policy decisions from the Bank of England and the Bank of Japan.

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ABOUT THE AUTHOR See More

Ignacio Teson

Economist and Financial Analyst

Ignacio Teson is an Economist and Financial Analyst. He has more than 7 years of experience in emerging markets. He worked as an analyst and market operator at brokerage firms in Argentina and Spain.