The U.S. stock market experienced a mixed performance today, with the S&P 500 index declining by 0.99%. Despite this daily drop, the index has shown resilience over the past month, gaining 2.0%.
In the large-cap sector, Bristol Myers Squibb Co. emerged as the top performer, delivering a return of 7.09%. Conversely, Chipotle Mexican Grill, Inc. struggled significantly, posting a return of -18.18%.

Mid-cap stocks also displayed volatility, with Insmed, Inc. leading the pack with a return of 16.33%, while EMCOR Group, Inc. faced challenges, returning -16.6%.

Small-cap stocks saw Guardant Health, Inc. shine with an impressive return of 27.87%, while FMC Corp. faced a steep decline of 46.52%.

Overall, the advance-decline ratio across the market indicated a challenging environment, with 1,651 stocks advancing compared to 2,815 declining, resulting in a ratio of 0.59. Large-cap stocks had 107 advancing against 125 declining, mid-caps showed 124 advancing versus 139 declining, and small caps reported 511 advancing against 962 declining, highlighting a trend of more stocks losing ground than gaining.