Expats & Nomads Latin America

Mexico’s Peso Slides to 17.68: What Expats Need to Know

By Lachlan Williams · September 27, 2026 · 5 min read

MEXICO · MONEY

Updated 1 times · Latest: 29 September 2026

Key Facts

The country Mexico has about 132 million people and an economy of about US$1.83 trillion in 2025 (World Bank), slightly smaller than Spain’s. It is tied to the US and Canada by the USMCA trade pact.
The level The peso closed Friday at 17.6760 per US dollar (MXN 10,000 ≈ US$566), down from around 16.87 in early September. It traded near 17.90 overnight (market estimate); Tuesday’s FIX is certified around midday Mexico City time.
The drivers The Federal Reserve’s rate hike on 16 September narrowed the US–Mexico rate gap, dulling the carry trade that had supported the peso.
The policy Banxico held its rate at 6.50 percent on 24 September, where it has sat since May.
The catalyst ahead A fourth US–Mexico trade round in Washington was reported for Monday and Tuesday, though the Economy Ministry says the date was never confirmed; tariff headlines tend to move the peso by a percent or two a day.
The reference Banxico certifies no FIX on weekends; Friday’s FIX was not verified at publication, so this piece uses the Friday market close, labeled as such.
What it means for you A cheaper peso means dollars go further: at Friday’s close, US$1,000 buys MXN 17,676, about 5 percent more pesos than at the start of September.

Three weeks ago a dollar bought 16.87 pesos. On Friday it bought 17.68, and overnight it touched 17.90. For expats paid in dollars, that is a quiet raise; for anyone holding pesos, it is a 5 percent haircut.

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Mexican peso coins: the currency has weakened about 5 percent against the dollar since early September. (The Rio Times archive)

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What Changed Since Early September

The peso entered September as one of the region’s star currencies, with Banxico’s FIX near 16.87. The slide began early in the month as the carry trade repriced, and accelerated after the US Federal Reserve raised rates on 16 September, its first hike since 2023, narrowing the interest-rate gap that powers the carry trade, in which investors borrow dollars to hold higher-yielding pesos. The repricing has been choppy: the peso slid 1.37 percent in a single session on 23 September, its sharpest one-day move in months, according to El Financiero, before firming to Friday’s close of 17.6760.

The Rate Backdrop

Banxico held its policy rate at 6.50 percent on 24 September, where it has been since May — a decision our Banxico standalone covered in full. With the Fed hiking and Banxico holding, the carry math that supported the peso has thinned, and the currency now trades more on trade headlines than on rate expectations. Banxico certifies no FIX on weekends; the relevant reference for Monday’s obligations is the FIX certified that afternoon.

What It Means for Your Budget

If your income is in dollars: the slide works for you. US$1,000 bought about MXN 16,870 in early September; at Friday’s close it buys MXN 17,676 — roughly MXN 800 more, a gain of about 5 percent in purchasing power. Rents and services priced in pesos are correspondingly cheaper in dollar terms. If your income is in pesos: the same move raises the peso cost of anything dollar-linked, imported goods, US subscriptions, travel, by about 5 percent. If you are moving a large sum: the trade talks on 28–29 September are a live volatility event; the peso can move a percent or two on a headline, in either direction.

What Comes Next

The immediate catalysts are dated: a Washington trade round reported for Monday and Tuesday, the Economy Ministry says the date was never confirmed, then the first round of Brazil’s election on 4 October, which tends to move the whole region’s currency complex. None of that makes the peso’s direction predictable — a tariff deal could snap it back toward 17, a failed round could extend the slide. What is knowable today: the carry-trade tailwind is gone, the trade headlines are the driver, and Friday’s 17.6760 close, with an overnight drift toward 17.90, is the honest reference until Tuesday’s FIX is certified around midday. The daily guide for Tuesday 29 September carries the region-wide rate table.

Is the peso weak or strong right now?

Both, depending on the window. At 17.6760 per dollar it is far stronger than its 2024 levels, but about 5 percent weaker than its early-September FIX near 16.87. The recent trend is down for the peso, driven by the Fed’s September hike thinning the carry trade, with the trade talks the next big test.

I get paid in dollars and live in Mexico. Should I convert now?

Friday’s close of 17.6760 already buys you about 5 percent more pesos than at the start of September. Whether to convert more depends on your horizon: the trade talks on 28–29 September can move the rate sharply in either direction, so splitting a large conversion across the week is a reasonable middle path. No one can promise the direction.

What is the difference between the FIX and the market rate?

The FIX is Banxico’s official reference rate, certified on banking days and used for settling many obligations, including some contracts and card transactions. The market rate is what you actually get when you exchange. The two normally sit close together, but on weekends no FIX is certified, so converters price off the last market close — which is why this piece uses Friday’s close of 17.6760, labeled as such, rather than an unverified FIX print.

Sources

Yahoo Finance (USD/MXN Friday close 17.6760, 25 September 2026)
Banco de México (policy decision, 24 September 2026; FIX certification calendar)
El Financiero (peso carry-trade repricing, 23 September 2026)
Politico and Al Jazeera (US–Mexico trade agenda, 17–18 September 2026)
The Rio Times desk reporting, 27 September 2026

More: Mexico news in English, every day from The Rio Times. See also our daily guide for Tuesday 29 September.

In depth

Mexico's economy in 2026

This article was produced by The Rio Times’ automated AI newsroom. Editorial responsibility: Matthias Camenzind, Publisher and Editor-in-Chief. The Rio Times also runs Ask Rio Times, which answers from 100,000+ of our own articles, the daily Latin America Power Map, and prediction-market odds on elections and markets.. How we use AI · Report an error

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