The U.S. stock market experienced a mixed performance today, with the S&P 500 index declining by 0.35%. Over the past week, the index has seen a slight decrease of 0.05%, although it remains up by 1.75% over the last 30 days. In the large-cap sector, Carvana Co. emerged as the top performer, boasting a return of 12.06%, while Air Products & Chemicals, Inc. struggled, recording a loss of 9.45%. Mid-cap stocks also showed variability, with Flex Ltd. gaining 8.22%, contrasted by Dollar General Corp., which fell by 6.12%. Small-cap stocks displayed significant volatility, highlighted by Wave Life Sciences Ltd., which surged by an impressive 147.26%. Conversely, Acadia Healthcare Co., Inc. faced challenges, declining by 9.5%. The overall advance-decline ratio across the market indicated that 1,814 stocks advanced compared to 2,424 that declined, resulting in a ratio of 0.75. In the large-cap category, only 76 stocks advanced against 158 that declined, yielding a ratio of 0.48. Mid-cap stocks had 88 advancing and 173 declining, while small-cap stocks saw 523 advancing versus 934 declining.