Former U.S. President Donald Trump has warned that the United States could impose tariffs on countries that oppose U.S. efforts to acquire Greenland, according to .
Why this matters:
Signals rising geopolitical and trade tensions
Could impact global markets, commodities, and risk assets
Adds uncertainty to international relations and trade policy
Geopolitics is back in focus.
Any escalation in trade threats can increase market volatility, so investors should stay alert.