Meanwhile, the Brazilian government authorized a nearly $2.6 billion credit package for the rural sector, which would be hit by Washington's latest 25% tariffs. It is also considering other retaliatory measures, including suspending patent protections for U.S. pharmaceutical products and agricultural seeds.
The tariffs come ahead of Brazil's October election, for which the latest opinion polls show President Luiz Inacio Lula da Silva outpacing conservative Senator Flavio Bolsonaro.
Equities in Brazil .BVSP gained 0.1%, while the Brazilian real BRL= weakened 0.2%. Separately, data showed economic activity in the region's largest economy grew slightly more than expected in May, reinforcing expectations of further rate cuts.
Most equities in the region were hit by the risk-off momentum. Equities in Chile .SPIPSA dropped 1.3%, tracking falling prices of copper.
Argentine stocks .MERV lost 1.1%, while equities in Colombia .COLCAP and Peru .MXNUAMPESCPGPE slipped 0.2% and 0.5%, respectively. Mexican stocks .MXX bucked the trend to gain 0.1%, and were also the only stocks among peers to log weekly gains.
However, Czerwonko of UBS Global Wealth Management said equity markets in the region were still attractively valued and continued to be supported by earnings growth in several countries.