Financial markets react strongly to new information about government policy direction and resolve.

Market Sensitivity: This study argues that tweets from U.S. President Donald J. Trump regarding Mexico significantly affected financial markets, specifically increasing Mexican peso volatility.

The Tweet Effect: The analysis focuses on特朗普's Mexico-related tweets during his presidency, demonstrating how these communications influenced investor behavior by signaling policy resolve.

Social Media Signal: Using data on Trump_tweets and the U.S.-Mexico exchange rate, researchers find that social media allows investors to quickly assess both a president's likely policy direction and their commitment level.

This research highlights an important function of digital communication in modern finance: providing real-time insights into presidential resolve.