整理：每日美股市场要闻速递（4月21日，周一）

Important News - Spot gold has surpassed $3420 per ounce, reaching a new historical high, with an increase of over 30% year-to-date [1] - Citigroup forecasts that the Federal Reserve will implement the next interest rate cut in June, previously predicted for May, while maintaining the expectation of a 125 basis point cut by 2025 [1] Individual Stock News - NVIDIA (NVDA.O) CEO Jensen Huang discussed AI robotics and AI energy demand with the Japanese Prime Minister [2] - Volvo plans to lay off up to 800 employees in the U.S. to address the impact of tariffs [2] - Tesla (TSLA.O) has delayed plans to produce a more economical Model Y in the U.S. [2] - Novo Nordisk (NVO.N) updated the Chinese label for its weight loss drug semaglutide to include cardiovascular benefit results [2] - MicroStrategy (MSTR.O) acquired 6,556 bitcoins for $555.8 million between April 14 and April 20, 2025 [2] - AstraZeneca (AZN.O) and Daiichi Sankyo's breast cancer drug Enhertu combination showed high-level results in a late-stage trial for metastatic HER2-positive breast cancer [2]