The Nikkei 225 index closed at 50,051.11 on Monday, marking the first time it has surpassed the 50,000 threshold. The index rose by 1.52%, or 751.46 points, driven by positive developments in U.S.-China trade relations and robust performance in U.S. markets. This surge in investor confidence also lifted other Asian markets, with South Korea's Kospi climbing 1.83% and Japan's Topix index increasing by 1.61%.