新浪财经隔夜要闻大事汇总：2025年12月19日

Market - US stock market closed higher on December 19, with the S&P 500 ending a four-day losing streak, driven by strong earnings from Micron Technology and lower-than-expected CPI data for November, which rose 2.7% year-on-year [1] - Micron Technology's stock surged 10.2% after reporting better-than-expected revenue and profit, indicating strong demand for storage chips, with the high bandwidth storage chip market projected to reach $100 billion [2] - The Philadelphia Fed manufacturing index showed poor performance, while initial jobless claims decreased, and real average weekly earnings rose 0.8% year-on-year in November [1] Company - Micron Technology reported strong demand for storage chips, with its first-quarter revenue and profit exceeding expectations, leading to a stock price increase of over 10% [15] - CarMax's second-hand car sales declined, with same-store sales down 9% year-on-year, as the company anticipates further reductions in gross margins to boost sales [12] - GE Vernova's stock rose 4.3% after Jefferies upgraded its rating to "Buy," citing optimism about its power business and electrification prospects [26] - The Federal Trade Commission (FTC) is investigating Instacart's AI-based pricing tool, which has led to a slight decline in its stock price [22] - ChatGPT mobile app user spending surpassed $3 billion since its launch in May 2023, with projections indicating a significant increase in spending in the coming years [23]