Group 1 - Vale, a global iron ore and nickel producer, closed at $15.57, up 4.29%, with trading volume reaching 57.9 million shares, 74% above its three-month average [1] - The S&P 500 gained 1.16% and the Nasdaq Composite added 1.18%, indicating a positive market trend, particularly in the materials and mining sector [2] - Material and mining stocks, including Vale, surged as tensions eased regarding a U.S. takeover of Greenland, following President Trump's speech at the World Economic Forum [3][4] Group 2 - Investors reacted positively to the removal of recently threatened new tariffs, contributing to the rebound in mining stocks [4] - Vale has experienced significant growth of 592% since its IPO in 2002, highlighting its long-term performance potential [1]