Dollar to Peso Today: Exchange Rate March 20, 2026 & US Inflation Impact

The Mexican peso held steady against the U.S. Dollar on Friday, March 20, 2026, trading at approximately 17.90 pesos per dollar. This rate has remained consistent throughout the week and is not expected to fluctuate significantly in the near term. The stability comes amid broader economic factors impacting currency valuations.

Peso Weakness Linked to U.S.-Middle East Conflict

The Mexican peso has experienced a notable decline in value at the beginning of March 2026, a trend analysts attribute to escalating tensions between the United States and the Middle East. These geopolitical concerns have disrupted oil prices, subsequently impacting the peso’s performance. This situation has led to a weakening of the Mexican currency.

The current exchange rate, nearing 18 pesos per dollar, represents a level not seen since September 2025. The peso began to strengthen in October 2025, but recent events have reversed that trend. The ongoing conflict has disrupted oil commerce in the Persian Gulf, as roughly 20% of global oil traffic passes through the Strait of Ormuz, prompting investors to seek the relative safety of the U.S. Dollar.

Exchange Rates in Mexico — March 20, 2026

Official Rate

• FIX Exchange Rate (Banxico/DOF): $17.8998 MXN per U.S. Dollar.

These rates may vary slightly throughout the day due to internal adjustments and bank schedules. The ranges reflect minor differences due to banking hours and internal policies.

The Banxico FIX exchange rate is a crucial tool for the Mexican financial market, as it determines the official value of the peso against the U.S. Dollar. This value is calculated by Banco de México (Banxico), based on a weighted average of quotes from wholesale foreign exchange market operations. This process ensures that the exchange rate is representative of actual market transactions, guaranteeing transparency and stability for companies and individuals operating with foreign currencies.

The FIX is determined each banking day from 12:00 hours onwards, and is officially published in the Diario Oficial de la Federación (DOF) the following day. This data is vital, as it is used to settle dollar-denominated obligations and contracts that will be liquidated in Mexico.

Distinction Between Banxico Exchange Rate and Market Price

The main difference between the Banco de México (Banxico) exchange rate and the market price lies in how they are calculated and used:

Banxico (FIX) Exchange Rate:

• It is a reference rate determined and published daily by the Bank of Mexico, usually around noon.
• It is calculated from a weighted average of quotes collected from the wholesale foreign exchange market during three specific periods in the morning, considering transactions that reflect prevailing market conditions.
• The FIX is used to settle foreign currency payment obligations, banking operations, contracts, and settlements, and is the official reference in invoicing and institutional operations.
• It remains fixed until the next business day, so it is not updated in real time, and tends to be more stable.

Market Price (spot exchange rate, banking, at the window):

• It is the value at which dollars are actually bought and sold in banks, exchange houses, or financial platforms, and may differ between institutions.
• This price varies constantly during the day according to supply and demand, economic expectations, monetary policy, news, and international factors.
• It is usually slightly higher for the public due to including commissions, profit margins, operating costs, and risk, which is why it is higher at the window than the FIX, and each bank offers different buying and selling prices.

when you check a bank price, there is usually a difference of cents (sometimes more) compared to the FIX value. The FIX helps to provide order and transparency to the Mexican market, but does not determine the final price of each individual transaction.

How Does Inflation in the U.S. Affect the Peso Exchange Rate Today?

U.S. Inflation directly influences the trend of the Mexican peso today, Sunday, March 8, 2026, by modifying market expectations about the Federal Reserve’s (Fed) monetary policy and the behavior of the dollar:

• U.S. Inflation directly affects the exchange rate of the Mexican peso, especially on days like today. If U.S. Inflation is lower than expected, as it was today, it generates the expectation that the Federal Reserve (Fed) may cut interest rates or not raise them soon. This weakens the dollar against other currencies and generally strengthens the Mexican peso.
• low inflation in the U.S. Today boosts the strength of the Mexican peso, as it reduces global demand for dollars and puts pressure on U.S. Authorities to avoid tightening their monetary policy. This causes the dollar exchange rate to have a downward trend against the Mexican peso during the day.

Currency Converter: Mexican Peso to U.S. Dollar and Vice Versa

ABOUT THE AUTHOR

Piero Hatto is a journalist and SEO analyst for Diario El Comercio, with more than 8 years of experience in media such as Depor, Deporte Total, and Willax TV. Specialized in creating content in Spanish and English on sports, politics, science, technology and current affairs, for audiences such as Mexico, the United States, and Spain.