U.S. financial markets experienced notable movements on December 4 as investors awaited key economic data and Federal Reserve Chair Jerome Powell's comments. The S&P 500 and Nasdaq reached record closing highs, supported by strong earnings and optimism about the U.S. economy. Treasury yields ticked higher, reflecting caution ahead of labor market updates and Powell's remarks. The Dow Jones approached the 45,000-point mark, driven by gains in technology stocks. Meanwhile, the U.S. dollar showed mixed performance, with fluctuations influenced by copper prices and expectations of economic stimulus in China, closing at a level of $975.