Peso Falls for a Sixth Week as Mexico's IPC Index Gains 4.36%
Mexico's currency hit its weakest level in eleven months this week, yet the Mexican stock exchange had its best run since April.
The Mexican peso closed Friday, Oct. 16, 2026, at 18.48 per U.S. dollar, according to a Reuters dispatch published by Milenio at 15:59 Mexico City time. It lost 0.51% on the day and 0.54% on the week. That is the sixth straight weekly decline, according to the agency.
During the week the currency traded as weak as 18.60 per dollar, its lowest level against the dollar since November 2025. It had ended the previous Friday, Oct. 9, at 18.41, according to El Financiero.
The S&P/BMV IPC, the index that tracks the largest companies on the Mexican Stock Exchange (BMV), rose 1.87% on Friday and ended at 68 929.72 points. It gained 4.36% on the week, its best weekly performance since early April, Reuters reported. FEMSA, the beverage and retail group, rose 5.35% after JP Morgan upgraded its recommendation.
| Source | Pesos per dollar | Cutoff |
|---|---|---|
| Reuters, via Milenio | 18.48 | Published at 15:59 |
| Infobae, with Dow Jones data | 18.49 | Not specified |
| El Financiero | 18.50 | 16:13 |
The differences come from each outlet's cutoff time. None of the figures is Banxico's FIX exchange rate, the official benchmark published in the federal gazette, which was not checked for this report.
James Salazar of Kapital Grupo Financiero told Reuters that "it seems the pressure on the peso is here to stay." One factor is the gap between Mexican and U.S. interest rates. The Federal Reserve raised its rate in September for the first time since 2023, and the market is debating whether another increase is coming. Banxico, Mexico's central bank, holds its benchmark rate at 6.50%, according to Reuters.
A weaker peso makes imports and dollar-priced inputs more expensive, a cost that can feed into the prices that inflation measures. Mexico's statistics agency, INEGI, will publish inflation for the first half of October next week.
