Mexico's benchmark S&P/BMV IPC index closed the final trading day of June below the 67,000 mark, settling at 66,967 points.
The 1.0% decline reflects growing investor anxiety ahead of a critical July 1 decision regarding the North American trade agreement.
62% to 67,641, buoyed by a broad-based relief rally across Latin American markets following a sudden de-escalation in regional tensions.
The sell-off marks a reversal of earlier momentum in the quarter.
Just days prior, the index had climbed 0.62% to 67,641, buoyed by a broad-based relief rally across Latin American markets following a sudden de-escalation in regional tensions.
However, that optimism has faded as the focus shifts squarely to the upcoming trade policy resolution.
The recent volatility underscores the market's sensitivity to geopolitical and trade uncertainties.