Economists have long said that when the when the United States catches a cold, Mexico gets pneumonia. But analysts said Monday that Hillary Clinton's pneumonia has given Mexico's peso something worse.
Banamex, one of Mexico's largest banks, listed the Mexican peso at 19.96, and other banks and exchange houses listed it even higher. The Mexican currency reached the psychological barrier of 20 pesos per dollar, and analysts and commentators cited the role of the U.S. presidential campaign.
A Banco Base analysis said the strength of Republican candidate Donald Trump influenced the peso's decline.
"The possibility that Donald Trump could win the Nov. 8 elections has made financial markets nervous and that has been especially reflected in the Mexican peso," the bank said.
Trump has been critical of Mexico and the trade agreements that give it access to the U.S. market. The U.S. has an outsize influence on Mexico's economy, buying about 80 percent of Mexico's exports.
Newspaper columnist Carlos Loret de Mola said Clinton's health problems are key.
Clinton had to leave a September 11 memorial ceremony early, and later revealed she had pneumonia.
Mexico's Treasury Department declined to comment on whether the U.S. campaign has affected the country's currency. The department attributed the peso's decline mainly to concerns about a possible interest rate hike in the United States and the drop in oil prices.
Oil prices were cited in the peso's decline in previous months, but they have risen somewhat from this year's earlier lows.
The peso has dropped almost 17 percent in value in the last year.