About the USD to MXN rate
The Mexican peso is unusually liquid for an emerging-market currency, largely because of how deeply integrated the US and Mexican economies are through manufacturing supply chains and cross-border trade.
USD/MXN reacts to US trade policy news more directly than most currency pairs, given how much of Mexico's exports go to the United States — tariff announcements or trade agreement news can move this pair within minutes.
Remittances from Mexican workers in the US are a major part of Mexico's economy, so this rate matters directly to millions of families — comparing the live mid-market rate against a transfer provider's quote is worth doing on this corridor specifically, since it's one of the most competitive remittance markets in the world.