Mexican Peso Falls 9 Centavos to 18.50

MEXICO · MARKETS

The Mexican peso ended the week at 18.5045 per dollar on Friday 16 October, 9 centavos weaker than last Friday’s close of 18.4111, Banxico data cited by El Economista show. For US readers, a softer peso makes Mexican trips and bills cheaper in dollars, yet it also signals nervous investors in a top US trading partner.

Mexico’s central bank, Banxico, publishes the official numbers behind this move, and the picture is more nuanced than one headline figure. Below is what the closing rate, the FIX reference rate and the market drivers each say.

How the Mexican Peso Lost 9 Centavos This Week

The peso fell 0.49% on Friday, or 9.03 centavos, from Thursday’s close of 18.4142, El Economista reported. Over the full week the loss was 9.34 centavos, or 0.51%, against the 18.4111 close of Friday 9 October.

During the week the dollar reached 18.6090, a level El Economista says Mexico had not seen since November 2025. On Friday itself the rate moved between 18.3425 and 18.5157.

El CEO counts this as the sixth weekly loss in a row, the longest run since the weeks from 19 July to 30 August 2019. A centavo is one hundredth of a peso, so nine centavos is about half a US cent (US$0.005) at the Friday rate.

What the Banxico FIX Rate Shows

Banxico also sets a daily reference rate called the FIX, which the Official Gazette (DOF) publishes on the next business day for settling dollar obligations in Mexico. Banxico’s statistics database puts the FIX determined on Friday 16 October at 18.4930 pesos per dollar, against 18.4163 in the Gazette listing of Monday 12 October, which carries the FIX of 9 October, a rise of 7.67 centavos or 0.42%.

The FIX is set during the trading day rather than at the close, so it can differ from the final quote, as it did on Friday (18.4930 against a close of 18.5045). The Gazette listing dated 16 October, 18.4250, is Thursday’s FIX, and Friday’s will appear in the listing of Monday 19 October.

FIX readings of 18.4888 on Wednesday, 18.4250 on Thursday and 18.4930 on Friday show that the slide was uneven rather than a straight line. The weekly FIX gain of 0.42% for the dollar is a little smaller than the 0.51% rise in the closing rate.

Why the Dollar Is Winning

US inflation set the tone on Wednesday 14 October, when September consumer prices rose 3.7% from a year earlier, with the monthly pace of 0.6% the fastest in five months, MéxFin chief executive Juan Carlos Cruz told El Economista. The peso lost 0.61% that day and traded as high as 18.60 per dollar, its weakest level since November 2025, El Economista reported.

Traders now bet on a Federal Reserve rate rise, with the CME FedWatch tool giving 71.7% to a 25 basis-point increase at the 8-9 December meeting, El Economista reported. Fed Chair Kevin Warsh declined on Friday at the IMF meetings in Bangkok to signal any decision, El Financiero reported, ahead of a meeting on 27-28 October listed in the Fed’s calendar.

Higher US rates narrow the gap with Mexican rates, which weakens the carry trade, where investors hold higher-yielding pesos funded with cheaper dollars. Banxico’s own target rate has stood at 6.50% since its 24 September decision, the central bank’s website shows.

Minutes of that meeting indicate that part of the board would cut the rate if inflation improves, El Economista reported. El Economista says Mexico’s inflation data for the first half of October are due next week and may shape that debate.

Felipe Mendoza of EBC Financial Group also pointed to HR Ratings cutting Mexico’s long-term sovereign rating to BBB, with a stable outlook, El CEO reported. That downgrade is explained in HR Ratings Mexico Downgrade Reasons Explained, and its Pemex fallout in Pemex Rating Cut Follows Mexico’s Downgrade.

Earlier moves in this slide are tracked in Mexican Peso Falls Past 18.40 on Central Bank Minutes. Friday’s stock-market side is in Mexico Stocks Rise 1.87% on Broad Rally | Mexico Market Report, Oct 16.

What It Means for You

A rent of MXN 20,000 (about US$1,081 at Friday’s Banxico close) costs about US$5 less than a week ago, when the same rent was about US$1,086. Travellers and remote workers paid in dollars gain a little purchasing power, but the gain is small.

Banamex quoted its counter rates on Friday at 17.93 pesos per dollar to buy and 18.95 to sell, El Financiero reported. A visitor who sold US$100 at 17.93 would receive MXN 1,793 (about US$97 at the Banxico close), so the bank spread costs more than the weekly move.

US companies that pay Mexican staff, suppliers or rent in pesos see those costs ease in dollars. Mexican households and firms with dollar debts or imported inputs face the opposite pressure.

The move is small, about half of one percent in a week, and far from a currency crisis. Banxico’s 6.50% rate still pays investors more than US rates do, which is the main cushion for the peso.

What Is Not Known

The Federal Reserve meets on 27-28 October and 8-9 December, and the 71.7% odds quoted apply to December, so what traders expect for October is not known. Nor is it known how much of the weekly slide came from US data and how much from Mexico’s rating cut.

The explanations quoted here come from market analysts, who are opinions rather than official findings. The first-half October inflation figure next week is unknown, as is Banxico’s next move.

What Prediction Markets Say

Polymarket’s market on Banxico’s November decision priced no change at 76%, a 25-basis-point cut at 20.1% and a 25-basis-point rise at 2.6% on Saturday 17 October (2:50 a.m. ET). The market has traded about US$68,300 in total, and these are real-money bets, not polls.

The question concerns Banxico’s rate rather than the exchange rate, so it shows what traders expect from policy. Thin volume means prices can swing on small orders.

Why we show this: prediction markets turn real-money bets into a live probability that moves within minutes of the news, which is why investors, campaigns and newsrooms in the United States now follow them closely. We show them next to polls and official results, never instead of them.

Frequently Asked Questions

How much did the Mexican peso fall this week?

The peso closed at 18.5045 per dollar on Friday 16 October, 9.34 centavos or 0.51% weaker than the 18.4111 close of 9 October. It touched 18.6090 during the week, its weakest level since November 2025.

What is the Banxico FIX rate?

The FIX is a daily reference rate set by Banxico and published in the Official Gazette (DOF) for settling dollar obligations in Mexico. The Banxico database shows 18.4930 pesos per dollar for Friday 16 October.

Why is the Mexican peso weaker?

Analysts quoted by Mexican outlets point to hot US inflation, bets on a Federal Reserve rate rise and a cut to Mexico’s sovereign rating by HR Ratings. These are explanations from analysts, not official findings.

Is Mexico cheaper for US visitors now?

A weaker peso gives dollar holders slightly more pesos, so hotels, meals and rent cost a little less in dollars. Bank counter rates can cost more than the weekly move, so compare exchange spreads.

When is the next Mexican inflation reading?

El Economista says the first-half October inflation figures are due next week. They will shape expectations for Banxico, whose target rate is 6.50%.

Will Banxico cut interest rates in November?

Polymarket traders give 20.1% to a 25-basis-point cut and 76% to no change at the November decision. Those are bets, not forecasts from Banxico, and the market is thinly traded.

Sources: El Economista, 16 October 2026; El Economista, 14 October 2026; El CEO, 16 October 2026; El Financiero, 16 October 2026; Diario Oficial de la Federación, exchange-rate listing, 16 October 2026; Banco de México, exchange-rate statistics (FIX), 16 October 2026; Federal Reserve, FOMC calendar; US Bureau of Labor Statistics, consumer price index; Banco de México, monetary policy announcements. Prediction-market prices from Polymarket public data, 17 October 2026, 2:50 a.m. ET.

This article was produced by The Rio Times’ automated newsroom system. How we use AI · Report an error · Editorial responsibility: Matthias Camenzind, Editor-in-Chief