Opinion

The Peso Is Moving More Trade Than the Tariff Is

The whole debate fixates on a duty rate printed in a schedule. Meanwhile the exchange rate reprices every cross-border quote daily, and over a contract's life a sustained currency move routinely moves more money than the tariff. One gets a press conference. The other just moves the money.

Opinion | By Lena Fournier, Trade & Policy. The argument here is the columnist's own; every figure links to the live series behind it, and opinion is not measurement.

Trade policy is argued in press conferences and decided in exchange rates, and the gap between those two facts is where a lot of sourcing money quietly moves. Everyone can quote the tariff rate; it is a number in a schedule with a date attached. Far fewer buyers can tell you where the peso closed, even though it repriced their landed cost overnight. As of Aug 7, 2026, the peso trades at 17.1357 per dollar (with no prior-year reading archived yet), the yuan at 6.7474 (with no prior-year reading archived yet), and the Canadian dollar at 1.3933 (with no prior-year reading archived yet). Those three lines are the real trade policy, and nobody holds a briefing when they move.

A step change versus a daily drift

Here is why currency wins the long game. A tariff is a one-time step: it lands, you know its size, and you plan around a fixed number. A currency move is continuous and cumulative, a fraction of a percent at a time, compounding across every unit over the life of a contract. If a sourcing currency strengthens even modestly against the dollar over two years, every unit costs more in dollar terms, silently, with no policy trigger to prompt a review. That slow compounding can easily exceed the effect of a tariff that looked far more dramatic the day it was announced. The drama and the money are in different places.

The size of the swing, measured

This is not a theoretical worry, and the multi-year archive puts a number on it. Over the last five-year stretch the peso has traded anywhere from 16.3250 in April 8, 2024 to 21.8530 in November 26, 2021 per dollar, a peak-to-trough band of about 34%. Sit with that figure next to the duty rate on your product. A 34% currency swing, applied to the entire landed value of everything you source from Mexico, quietly dwarfs the typical tariff line, which lands on a base and is often partly reclaimed through exclusions. Today the peso is the lowest since May 31, 2024, which happens to raise the dollar cost of Mexican sourcing, and not one buyer in ten has repriced a 2024 contract to reflect it.

Four years, three reversals, no press conferences

Here is the part that should end the argument. Watch what the peso did to a Mexican sourcing program over the last four years, in order. From the close of 2021 into 2023 the peso moved down 18% against the dollar, and because a stronger peso means more dollars per unit, that leg was a straight cost increase on everything sourced south of the border. Then in a single year, 2023 into 2024, it went up 23%, handing the whole thing back and then some. Since 2024 it has moved down 18%. Three reversals in four years, each one large enough to swamp a duty line, and not one of them came with an announcement, a comment period, or a headline.

Now put a number on what that means. A sourcing program running at even modest volume, exposed to the 34% peak-to-trough band in this archive would have seen its landed cost move by more, in dollar terms, than almost any tariff line applied to the same goods over the same period. And unlike the tariff, none of it triggered a review, because nothing happened. There was no event. The rate just drifted, every day, in the direction of somebody's margin.

The tariff is not nothing, but it is legible

I am not arguing tariffs do not matter. A duty schedule can erase a unit-cost advantage in a single line, and the effective rate a company actually pays, after exclusions and reclassifications, is a real cost worth tracking. But the tariff has one merciful quality: it is legible. You can read it, model it, and plan around it, because it sits still. The currency does not sit still, and that is exactly why it is more dangerous to a buyer who treats it as a constant. The tariff is the risk you can see. The exchange rate is the risk that moves while you are looking at the tariff.

A tariff announces itself. A currency move just shows up in the numbers, quarter after quarter, until someone finally checks the rate they assumed two years ago.

The move I would actually make

Before signing any cross-border supply agreement, price the landed cost at today's exchange rate and then again at plus and minus ten percent on the sourcing currency. If a ten percent adverse move erases the deal's advantage, the sourcing decision is really a currency bet wearing a procurement costume, and it should be hedged, given a currency-adjustment clause, or reconsidered in favor of a source in your own currency. Watch the effective tariff rate too, it is a genuine cost, but do not let the number that holds still distract you from the one that does not.

Use the nearshoring landed cost calculator to rerun a sourcing decision at today's rates and a plus-or-minus currency band. Stress-test the currency

Published 2026-08-06.