The Banco de Mexico hiked interest rates by 50 basis points to 5.75 percent.
About 14,000 tractor-trailers cross the border daily in Laredo, the nation's busiest inland port.
"We have estimated that if NAFTA were eliminated in its totality the GDP fall could be around 2.7 percent," said U.N. executive secretary Alicia Barcena.
Citibank is expected to invest over 1.2 billion dollars in Mexico over the next four years, regardless of Trump's policies.
Mexico wants to reduce its economic dependency on the U.S., and a recent auction of deep-water oil fields was notable for the pledges made by investors from China, Australia, Malaysia and elsewhere.
Overall new car sales in Mexico are up 18.5% between January and November compared to the same period last year.
Slim said Trump's potential success would also be Mexico's, arguing that a 4 percent U.S. growth rate and the creation of millions of jobs would benefit Latin America's second biggest economy
The Brazilian real tumbled 8 percent in the four days following the vote, the second-worst performing currency in Latin America behind the Mexican peso. But the real has since stabilized to around 3.40 to the dollar as the initial shock faded
14.6% of companies say they've stopped investing in Mexico's private sector as a result of crime.
Gross domestic product grew by 1.0 percent in the third quarter compared with the prior quarter, according to seasonally adjusted data from Mexico's statistics agency