Sunita Somvanshi
The peso-to-dollar rate has shifted materially since our September exchange-rate coverage. The Mexican peso weakened to approximately 18.41 per US dollar following publication of Banco de México‘s October 8 meeting minutes, trading near a one-year low. The specific trigger this time is not general dollar strength — it is Banco de México’s internal policy minutes, which showed most board members see room to continue easing interest rates, narrowing the yield gap with the US dollar.
Banco de México’s five-member board unanimously held the benchmark rate at 6.5% at the September 24 meeting. Minutes from that meeting, published on October 8, showed most board members see room to continue the easing cycle — a signal the market read as narrowing the yield advantage that makes peso-denominated assets attractive to carry-trade investors. The peso weakened to approximately 18.41 per USD following publication of the minutes, near a one-year low. Banco de México’s official daily FIX rate — published in its Economic Information System (SIE) — is the authoritative benchmark; rates at banks and border exchange houses carry a wider spread and will differ from any headline figure.
A rate cut narrows the yield advantage that attracts dollar-to-peso carry trades. When investors can earn less on Mexican assets relative to US Treasuries, some reallocate to dollars — putting downward pressure on the peso. For Mexican households receiving dollar remittances from the US, a weaker peso means each dollar sent from the US converts to more local currency right now, though fees and conversion spreads affect the actual amount received. For businesses in Mexico importing goods priced in dollars — machinery, consumer products, raw materials — the same exchange rate raises costs and feeds into retail prices.
Why did the Mexican peso weaken after the Banxico minutes? Banxico’s minutes showed most board members see room to continue easing interest rates. Reducing the rate differential between Mexican and US assets lowers the yield advantage that attracts carry-trade capital into pesos, reducing demand for the currency and putting downward pressure on the exchange rate.
The minutes showed consensus that easing could continue, but Banco de México has signaled caution about the pace. A faster easing cycle would further narrow the yield gap with US assets, reducing the carry-trade attraction of peso-denominated investments. That means further peso-dollar movement is possible before the next formal rate decision.
To get the current official rate, check Banco de México’s SIE at banxico.org.mx — not social media snapshots or aggregator sites, which may lag by hours. Banxico’s next formal monetary policy decision will be the clearest indicator of whether the board proceeds with a further cut. Check back for updates on that announcement.
