Mexican Peso Ends Two Sessions with Declines as Dollar Strengthens

Web Editor

September 19, 2025

a pile of money sitting on top of a pile of coins on top of a table next to a pile of coins, Aquirax

Background on the Mexican Peso and its Recent Performance

The Mexican peso has experienced marginal declines against the US dollar over the past two sessions, weakening by just 0.04% or 0.73 cents, according to data from Banco de México (Banxico). This trend has continued for two weeks, with the peso losing 0.33% against the dollar.

Factors Influencing Peso’s Decline

Analysts from Monex attribute the peso’s decline to the strengthening of the US dollar, influenced by recent economic data and expectations that the Federal Reserve (Fed) may not continue its accommodative monetary policy.

Gabriela Siller, director of financial analysis at Grupo Base, notes that the dollar’s strength is partly due to a correction following previous session losses. She also highlights increased market volatility during the “triple witching” – the simultaneous expiration of stock options, index futures, and index put options.

Market Volatility and Dollar Strength

The “triple witching” event contributes to greater market volatility, causing the dollar to strengthen and the peso to weaken. According to Grupo Financiero Banorte, upward pressure on the peso has surpassed the 18.35-peso support level, with the next significant resistance level located at 18.50 pesos.

Economic Data and Fed Expectations

The recent economic data and expectations surrounding the Fed’s monetary policy decisions have played crucial roles in shaping market sentiment. As investors anticipate potential changes in the Fed’s accommodative stance, the dollar has gained strength, putting downward pressure on the Mexican peso.

Impact on the Mexican Economy

The peso’s recent decline against the dollar can have various implications for Mexico’s economy. A weaker peso may make Mexican exports more competitive internationally, potentially boosting the country’s export sector. However, it can also lead to higher import prices, increasing inflationary pressures.

Moreover, a depreciating peso can affect investor confidence and capital inflows. Investors may perceive the currency’s decline as a sign of economic instability, potentially leading to reduced foreign investment in Mexico.

Key Questions and Answers

  • What is the recent trend of the Mexican peso against the US dollar? The Mexican peso has weakened by 0.04% or 0.73 cents against the US dollar over two sessions, continuing a two-week decline of 0.33%.
  • What factors are contributing to the peso’s decline? The strengthening of the US dollar, influenced by recent economic data and expectations that the Federal Reserve may not maintain its accommodative monetary policy, are key factors.
  • How does the “triple witching” event affect market volatility and the peso-dollar exchange rate? The simultaneous expiration of stock options, index futures, and index put options during “triple witching” contributes to increased market volatility, causing the dollar to strengthen and the peso to weaken.
  • What are the potential implications of a weaker peso for Mexico’s economy? A weaker peso may make Mexican exports more competitive internationally, potentially boosting the export sector. However, it can also lead to higher import prices and increased inflationary pressures. Additionally, investor confidence and capital inflows may be affected, potentially reducing foreign investment in Mexico.